Luke Steel is a trusted manufacturer and supplier of Alloy Steel Grade B7M fasteners, based in Houston, USA. They focus on providing high-strength fastener solutions for critical applications, offering a range of products including bolts, nuts, studs, and washers that comply with ASTM A193 Grade B7M standards. These fasteners are specifically engineered for use in corrosive and high-pressure settings, where safety and durability are essential. Catering to industries like oil & gas, chemical processing, petrochemical, and power generation, Luke Steel merges cutting-edge manufacturing techniques with rigorous quality control to ensure reliable fastening products for extreme service conditions.
Alloy Steel Grade B7M fasteners are crafted from a chromium-molybdenum (Cr-Mo) steel alloy, which undergoes a quenching and tempering process followed by strain aging to reduce hardness. This adjustment minimizes the chances of stress corrosion cracking and hydrogen embrittlement in tough environments. The typical chemical makeup includes 0.40–0.49% carbon, 0.75–1.00% chromium, and 0.40–0.65% molybdenum. In terms of mechanical properties, these fasteners boast a minimum tensile strength of 100 ksi, a minimum yield strength of 80 ksi, and a maximum hardness of 235 HB. These features make B7M fasteners ideal for sour gas and high-pressure applications.
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 |
Alloy Steel Grade B7M fasteners are essential in critical applications where strength needs to be balanced with improved corrosion resistance and lower hardness. They are commonly used in bolted connections for pressure vessels, reactors, heat exchangers, valves, and flanged joints within the oil & gas and petrochemical sectors. Their design is particularly advantageous for sour gas (H₂S) service, as the reduced hardness helps prevent sulfide stress cracking. With outstanding mechanical stability and chemical resistance, B7M fasteners guarantee long-lasting performance and safety in aggressive, high-pressure, and high-temperature environments.
Luke 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 Houstan, USA.
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