Alloy Steel Gr B7M Fasteners are robust, precision-crafted components tailored for essential industrial and mechanical tasks. Made from top-quality alloy steel that includes chromium and molybdenum, these fasteners deliver outstanding tensile strength, hardness, and resistance to wear, corrosion, and fatigue. With their precise threading, smooth surfaces, and tight dimensional tolerances, Gr B7M Fasteners ensure secure connections, dependable load distribution, and long-lasting performance. They’re widely utilized in industries like oil and gas, petrochemicals, power generation, and heavy engineering, where safety, durability, and mechanical reliability are crucial.
Alloy Steel Grade B7M Fasteners are manufactured using chromium-molybdenum steel, mainly consisting of carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum for added strength and corrosion resistance. These fasteners are tempered at low temperatures to conform to ASTM A193 requirements, providing added toughness and stress corrosion resistance. They possess minimum tensile strength of 860 MPa and yield strength of 720 MPa, hardness limit of 235 HBW (Brinell Hardness) for ductility assurance. They find the best applications in high-pressure and high-temperature conditions and display great performance in oil & gas, petrochemical, and power industries.
Specification : ASTM A 193 ASME SA 193
Standard : DIN, ASTM, BS and all International Standards
Length : 3 mm to B7M mm
Size : M3 – M56 | 3/6″ to 2″ | Custom Sizes
Types : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Socket Head Cap Screw, Washers, Spring Washers, Studs, Anchors
| Alloy Steel B7M | C | Mn | P | S | Si | Cr | Mo |
| 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 |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
|---|---|---|---|---|---|
| B7M | Up to 2-1/2 | 125 | 105 | 16 | 50 |
| 2-5/8 – 4 | 115 | 95 | 16 | 50 | |
| 4-1/8 – 7 | 100 | 75 | 18 | 50 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
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Hexagon Bolts / Set Screws |
Stud Bolts |
Hexagon Nuts |
Socket Capscrews |
|---|---|---|---|
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DIN 931 |
BS4882 |
DIN 934 |
DIN 912 |
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DIN 933 |
DIN 976 |
BS 1768 |
DIN 6912 |
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BS 1768 |
BS 1769 |
DIN 7984 |
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UNI 5731 |
BS 1083 |
ANSI B18.3 |
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UNI 5739 |
BS 3692 |
ISO 4762 |
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ISO 4014 |
ISO 4032 |
UNI 5931 |
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ISO 4017 |
ISO 4033 |
BS 2470 |
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BS 1769 |
ANSI B18.2.2 |
BS 4168 |
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BS 3692 |
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ANSI B18.2.1 |
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Socket & Slotted Set Screws |
Socket & Slotted Countersunk Screws |
Studs |
Washers |
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DIN 913 |
DIN 963 |
DIN 938 |
DIN 125 |
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DIN 914 |
DIN 7991 |
DIN 939 |
DIN 9021 |
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DIN 915 |
BS 4168 |
DIN 2510 |
BS 4320 |
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DIN 916 |
BS 1981 |
BS 4439 |
BS 3410 |
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DIN 551 |
BS 483 |
BS 2693 |
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DIN 553 |
BS 2470 |
Spring Washers |
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DIN 438 |
DIN 127 |
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BS 4168 |
BS 4464 |
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BS 1802 |
You’ll often find Alloy Steel Gr B7M Fasteners in flanged joints, pipelines, pressure vessels, heavy machinery, and structural assemblies. They’re the go-to choice for applications that need secure, durable, and maintenance-free fastening solutions, even in tough industrial conditions. Their impressive combination of strength, corrosion resistance, and long-term reliability makes Alloy Steel Gr B7M Fasteners a top pick for critical engineering and industrial projects.
Chetak Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Hyderabad, India.
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