ISO 9001:2008 | OHSAS 18001:2007 | ISO 14000:2004
Alloy Steel Fasteners Manufacturers in India, ASTM A193 Alloy Steel Fasteners Suppliers in India, ASTM A194 Alloy Steel Fasteners, ASTM A563 grade a Nut, ASTM A194 grade b7 Nuts, ASTM A490 Bolts, ASTM A490 Threaded Rod, ASTM A354 grade bd Bolts, ASTM A320 grade b8m Bolts, ASTM A193 gr b7 Stud Bolt.
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Alloy Steel Fasteners Suppliers, Supplier of Alloy Steel Fasteners, ASTM A320 L7M Alloy Steel Bolts, ASTM F568 Grade 8.8 Fasteners, Alloy Steel Nuts, Alloy Steel Bolts, Alloy Steel Screws, Alloy Steel Washers, Alloy Steel Bolts and Screws, Alloy Steel Heavy Hex Bolts, Alloy Steel Finished Hex Bolts, ASTM A194 Suppliers, A194 Suppliers, ASTM A193 Suppliers, A193 Suppliers, ASTM A490 Bolts, Stud Bolt ASTM A193 b7m, ASTM A194 grade b16 Bolts, ASTM A194 grade b16 Fasteners, ASTM A490 Threaded Rod, A490 Bolts, A490 Galvanized Bolts, A490 Anchor Bolts, ASTM A194 grade 2h Nuts, ASTM A194 grade 6 Nuts, ASTM A194 Bolts, ASTM A563 Jam Nut, ASTM A563 grade a Nut, ASTM A563 grade a Washer, ASTM A563 grade dh Nuts, ASTM A563 Heavy Hex Nuts, ASTM F568 Grade 8.8 Fasteners, ASTM F568 Grade 8.8.3 A Fasteners Suppliers in Nigeria, Australia, Egypt, Iran , Iraq.
MICROTECH STAINLESS STEEL CO. is specialized in manufacturing and supplying of Alloy Steel Fasteners , Pipe Fitting, Forged Fittings, Butt weld fittings, Flanges in Stainless steel, alloy Steel & carbon Steel since 1991, we manufacture wide range of Alloy Steel Fasteners such as Alloy Steel nuts, Alloy Steel bolts, Alloy Steel screws, Alloy Steel washers, Alloy Steel bolts and screws, Alloy Steel heavy hex bolts, Alloy Steel finished hex bolts, Alloy Steel oval neck track bolts, Alloy Steel bent bolts, Alloy Steel hex cap screws, Alloy Steel heavy hex screws, Alloy Steel 12-point screws, Alloy Steel socket head cap screws etc. as per International standard like ASME/ASTM/API, we are supplying & exporting Alloy Steel Fasteners in seamless & welded both forms to more than 60 countries for over 2 decades, we have our dealers & distributors in Nigeria, Australia, Malaysia, Egypt, South Africa, Tanzania, Kenya, Mozambique, Angola, Gabon Germany, Turkey, France, United Kingdom, Italy, Netherlands, Iran , Iraq , Saudi Arabia, United Arab Emirates , Iisrael, Jordan, Oman, Kuwait, Qatar, Bahrain, Bangladesh, China, Indonesia, South Korea, Pakistan, Philippines, Singapore, Sri Lanka, Thailand, Vietnam, Brazil, Colombia, Argentina & United States of America, MICROTECH STAINLESS STEEL CO. is the only company in INDIA which is approved Manufacturer & supplier of Alloy Steel Fasteners in 300 top companies worldwide. Few of them are ORPIC, NIORDC, Saudi Aramco, SABIC, PIDMCO, GASCO, KNPC, Indian Oil, BPCL, HPCL, NTPC, BARC & Indian Navy, MICROTECH STAINLESS STEEL CO. is ISO 9001:2008, ISO 14001, OHSAS 18001 Certified Company since 2010.
MICROTECH STAINLESS STEEL CO. is manufacturing & exporting pipe flange from 1/2" thru 200", 150 lbs to 3000 lbs including Alloy Steel Fasteners , Stainless Steel Fasteners and Carbon Steel Fasteners according to ANSI , API , MSS , DIN for the world market. We are experienced & specialized in manufacturing special ring Fasteners and other forgings as per drawing provided by our clients.
We supply ASME Code and Non Code Industrial Fasteners for the Petrochemical, Chemical & Waterworks industries. check our price before buying Fasteners in Carbon Steel Fasteners , Stainless Steel Fasteners , Alloy Steel Fasteners .
Alloy Steel Fasteners Specification
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Material
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Size
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Length
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Specification
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Alloy Steel Fasteners
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M02 to M33 |
Upto 5 Meters |
IS BS ASTM |
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Material:
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Alloy Steel
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Standard :
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ASTM A193 / A194 , ASME SA193 / SA194 |
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Grade:
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B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M |
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Type of Fasteners:
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Bolts : Bolts stud bolts, hex head bolts, socket hexagon head screw anchor bolts, u-bolts, J bolts, mushroom head square neck bolts, t- head bolts, wing screw, eye bolt, eye bolt, foundation bolts and structural bolts Washer : Plain washer , plain big & small OD washer , spring lock washer , spring washer heavy duty , tooth washer , star washer , tab washer with one & two tab Nuts : Hexagon nuts, hexagon coupling nuts, hexagon thin nut, square nut, hexagon castle nuts, self locking nut, hexagon domed cap nuts Screw : Pan head slotted screws, cheese head slotted screws, countersunk head slotted screws, countersunk raised head slotted screws, pan phillipse head screw, countersunk Phillipse raised head screws, slotted cheese trim head machine screws, socket head allen cap screws, allen countersunk socket head cap screws, socket head shoulder screws, socket head cap screw low head, hexagon socket set screw with flat point, hexagon socket set screws with cone point, hexagon socket set screw with dog point, hexagon socket set screws with dog point, hexagon socket set screws with cup point, imprial socket cap screws. Other : Threaded rod, as per drawing and customers spec. coating, hot dipped galvanizing, phosphate, Teflon, xylon, zinc, cadmium.
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In Form of:
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Hex, Square, Round , Threading as per Gauge Etc. |
Alloy Steel Fasteners Dimensions as per A194
Full Range of Fasteners Products both Imperial & Metric. Dimensions range from M3 to M72 and quantities from 1 to 10,000.
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Hexagon Bolts / Set Screws
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Stud Bolts
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Hexagon Nuts
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Socket Capscrews
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|---|---|---|---|
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DIN 931
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BS4882
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DIN 934
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DIN 912
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DIN 933
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DIN 976
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BS 1768
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DIN 6912
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BS 1768
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BS 1769
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DIN 7984
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UNI 5731
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BS 1083
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ANSI B18.3
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UNI 5739
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BS 3692
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ISO 4762
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ISO 4014
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ISO 4032
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UNI 5931
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ISO 4017
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ISO 4033
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BS 2470
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BS 1769
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ANSI B18.2.2
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BS 4168
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BS 3692
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|||
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ANSI B18.2.1
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| Socket & Slotted Set Screws | Socket & Slotted Countersunk Screws | Studs | Washers |
|---|---|---|---|
| DIN 913 | DIN 963 | DIN 938 | DIN 125 |
| DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
| DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
| DIN 916 | BS 1981 | BS 4439 | BS 3410 |
| DIN 551 | BS 483 | BS 2693 | |
| DIN 553 | BS 2470 | Spring Washers | |
| DIN 438 | DIN 127 | ||
| BS 4168 | BS 4464 | ||
| BS 1802 |
Alloy Steel Fasteners Useful Info
| Standard / Material grade | C | Mn | P | S | Si | Cr | Mo | Al | V |
|---|---|---|---|---|---|---|---|---|---|
| ASTM A193 B7 (Cr- Mo AISI 4140,4142,4145 ) | 0.37-0.49 | 0.65-1.10 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.75-1.20 | 0.15-0.25 | – | – |
| ASTM A1193 B7M (Cr- Mo AISI 4140,4142,4145 ) | 0.37-0.49 | 0.65-1.10 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.75-1.20 | 0.15-0.25 | – | – |
| ASTM A193 B16 (Cr- Mo -V ) | 0.36-0.47 | 0.45-0.70 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.80-1.15 | 0.50-0.65 | 0.015Max | 0.25-0.35 |
| ASTM A193 B5 (5% Cr AISI 501) | 0.10 max | 1.00 max | 0.040 max | 0.030 Max | 1.00 Max | 0.40 -6.00 | 0.40 -0.65 | – | – |
| ASTM A320-L7 (Cr- Mo AISI 4140,4142,4145 ) | 0.38-0.48 | 0.75-1.00 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | – | – |
| ASTM A 320 L7M | 0.38-0.48 | 0.75-1.00 | 0.035 Max | 0.04 Max | 0.15-0.35 | 0.80-1.10 | 0.15-0.25 | – | – |
| ASTM A194 Gr.2H | 0.40 Min | 1.00 Max | 0.040 Max | 0.050 Max | 0.40 Max | – | – | – | – |
| ASTM A194 Gr.2HM | 0.40 Min | 1.00 Max | 0.040 Max | 0.050 Max | 0.40 Max | – | – | – | – |
| ASTM A194 Gr.4 | 0.40-0.50 | 0.70-0.90 | 0.035 Max | 0.04 Max | 0.15 – 0.35 | 0.20 – 0.30 | – | – | – |
We manufactures and exports the entire range stud bolts, alloy steel bolts, alloy steel bolting, alloy steel stud bolts, stud bolts oil and gas, B-7 stud bolts the popular grades of Alloys steel are from ASTM A 193 / SA 194 and A 194 / SA 194 grades like B7, B7M, L7 and L7M grades.
ASTM A193
This specification covers alloy steel and stainless steel bolting material for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. Ferritic steels shall be properly heat treated as best suits the high temperature characteristics of each grade. Immediately after rolling or forging, the bolting material shall be allowed to cool to a temperature below the cooling transformation range. The chemical composition requirements for each alloy are presented in details.
| B7 | Alloy steel, AISI 4140/4142 quenched and tempered |
|---|---|
| B16 | A heat-treated chromium-molybdenum-vanadium steel for high-pressure, high-temperature service. |
Four Properties of Alloy Steel Fasteners
Alloy steel fasteners use Alloy steel as raw materials. Alloy steel fasteners has four properties.
1. High temperature resistance. For high hardness, the fasteners has strong oxidation resistance. It cannot work under high temperature and cannot be interfered by high temperature. If the fasteners is passivated after being made out, the temperature resistance will be better.
2. Physical properties. Alloy steel fasteners has higher specific resistance. The specific resistance of Alloy steel is higher than that of carbon steel by five times. Standard parts have an expansion factor. Through experiment, if the temperature is higher, the expansion factor of Alloy steel fasteners will be improved definitely.
3. Stress capacity. Alloy steel fasteners can endure moderate stress. Although it cannot be compared favorably with high strength bolt, the fasteners can still meet the common requirements.
4. Mechanical properties. High rust resistance and corrosion resistance have close relationship with the features of Alloy steel. For standard parts developing constantly, mechanical properties of Alloy steel fasteners will be enhanced further.
Mechanical Properties - Alloy Steel Fasteners
Bolts -Grade Identification Markings
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Grade
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Size
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Tensile ksi, min
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Yield, ksi, min
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Elong, %, min
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RA % min
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|---|---|---|---|---|---|
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B7
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Up to 2-1/2
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125
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105
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16
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50
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2-5/8 - 4
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115
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95
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16
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50
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|
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4-1/8 - 7
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100
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75
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18
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50
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|
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B8 Class 1
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All
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75
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30
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30
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50
|
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B8M Class 1
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All
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75
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30
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30
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50
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B8 Class 2
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Up to 3/4
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125
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100
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12
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35
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7/8 - 1
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115
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80
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15
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35
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|
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1-1/8 - 1-1/4
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105
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65
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20
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35
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|
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1-3/8 - 1-1/2
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100
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50
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28
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45
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|
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B8M Class 2
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Up to 3/4
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110
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95
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15
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45
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7/8 - 1
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100
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80
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20
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45
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|
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1-1/8 - 1-1/4
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95
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65
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25
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45
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1-3/8 - 1-1/2
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90
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50
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30
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45
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Material Chemical Composition
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Element
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B7 (AISI 4140)
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B8 (AISI 304)
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B8M (AISI 316)
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|---|---|---|---|
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Carbon
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0.37 - 0.49%
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0.08% max
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0.08% max
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Manganese
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0.65 - 1.10%
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2.00% max
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2.00% max
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Phosphorus, max
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0.035%
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0.045%
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0.045%
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Sulfur, max
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0.040%
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0.030%
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0.030%
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Silicon
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0.15 - 0.35%
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1.00% max
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1.00% max
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Chromium
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0.75 - 1.20%
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18.0 - 20.0%
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16.0 - 18.0%
|
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Nickel
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8.0 - 11.0%
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10.0 - 14.0%
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|
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Molybdenum
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0.15 - 0.25%
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2.00 - 3.00%
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Recommended Nuts,Bolts & Washers
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Bolt Grade
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Nuts
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Washers
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|---|---|---|
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B7
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A194 Grade 2H
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F436
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B8 Class 1
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A194 Grade 8
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SS304
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B8M Class 1
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A194 Grade 8M
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SS316
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B8 Class 2
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A194 Grade 8
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SS304
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B8M Class 2
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A194 Grade 8M
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SS316
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ASTM A194
The ASTM A194 specification covers carbon, alloy and stainless steel nuts intended for use in high-pressure and/or high-temperature service. Unless otherwise specified, the American National Standard Heavy Hex Series (ANSI B 18.2.2) shall be used. Nuts up to and including 1 inch nominal size shall be UNC Series Class 2B fit. Nuts over 1 inch nominal size shall be either UNC Series Class 2B fit or 8 UN Series Class 2B fit. High strength ASTM A194 grade 2H nuts are common in the marketplace and are often substituted for ASTM A563 grade DH nuts due to the limited availability of DH nuts in certain diameters and finishes.
Each alloy shall conform to the chemical composition requirements prescribed. Hardness tests, proof of load tests, and cone proof load tests shall be made to all nuts to meet the requirements specified.
Grades Covered Under Astm A194
| 7 | Quenched & tempered alloy steel heavy hex nuts |
|---|---|
| 7M | Quenched & tempered alloy steel heavy hex nuts |
A194 Mechanical Properties - Alloy Steel Fasteners
| Grade Identification Marking5 | Specification | Material | Nominal Size, In. | Tempering Temp. °F | Proof Load Stress, ksi | Hardness Rockwell | See Note | |
|---|---|---|---|---|---|---|---|---|
| Min | Max | |||||||
| ASTM A194 Grade 4 | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 | 1,2 | |
| ASTM A194 Grade 7 | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1100 | 175 | C24 | C38 | 1,2 | |
| ASTM A194 Grade 7M | Medium Carbon Alloy Steel, Quenched and Tempered | 1/4 - 4 | 1150 | 150 | 159 | 237 | 1,2,3 | |
|
NOTES:
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A194 Chemical Properties - Alloy Steel Fasteners
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Element
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2, 2H, and 2HM
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4
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7 and 7M (AISI 4140)
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8 (AISI 304)
|
8M (AISI 316)
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|---|---|---|---|---|---|
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Carbon
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0.40% min
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0.40 - 0.50%
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0.37 - 0.49%
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0.08% max
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0.08% max
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Manganese
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1.00% max
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0.70 - 0.90%
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0.65 - 1.10%
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2.00% max
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2.00% max
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Phosphorus, max
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0.040%
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0.035%
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0.035%
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0.045%
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0.045%
|
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Sulfur, max
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0.050%
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0.040%
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0.040%
|
0.030%
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0.030%
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Silicon
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0.40% max
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0.15 - 0.35%
|
0.15 - 0.35%
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1.00% max
|
1.00% max
|
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Chromium
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0.75 - 1.20%
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18.0 - 20.0%
|
16.0 - 18.0%
|
||
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Nickel
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8.0 - 11.0%
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10.0 - 14.0%
|
|||
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Molybdenum
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0.20 - 0.30%
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0.15 - 0.25%
|
2.00 - 3.00%
|