Alloy Steel Gr B6 Bolts are tough, high-strength fasteners designed for the toughest industrial, mechanical, and structural tasks. Crafted from top-notch alloy steel that includes chromium and molybdenum, these bolts deliver outstanding tensile strength, hardness, and resistance to wear, fatigue, and corrosion. With their precise threading and smooth finishes, Gr B6 Bolts guarantee secure fastening, dependable load distribution, and long-lasting performance. They’re a go-to choice in industries like oil and gas, petrochemical, power generation, and heavy engineering, where durability, safety, and mechanical reliability are non-negotiable.
Alloy Steel Gr B6 Bolts are strong bolts meant for demanding applications requiring high durability. Generally made of 0.50-0.55% Carbon, 0.60-0.90% Manganese, 0.15-0.30% Silicon, 2.00-3.00% Chromium and 0.15-0.25% Molybdenum. Alloy Steel Gr B6 Bolts are heat-treated for increased tensile strength and corrosion resistance. The alloyed content provides high mechanical properties like pressure and high temperature resistance. Alloy Steel Gr B6 Bolts ensure reliable and long-term fastening in mission-critical and high-performance applications.
| Specifications | : | ASTM A 193 ASME SA 193 |
| Standard | : | DIN, ASTM, BS and all International Standards |
| Length | : | 3 mm to B6 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Hex Head Bolts, Square Bolts, U bolts, Eye bolts, T bolt, Hex Bolt, Lag Bolts, Counter sunk Bolts |
| Alloy Steel B6 | C | Mn | Si | P | S | Co | Cr |
| 0.15 max | 1.00 max | 1.00 max | 0.040 | 0.030 | – | 11.50-13.50 |
| Yield Rp0.2 (MPa) | Tensile Rm (MPa) | Impact KV/Ku (J) | Elongation A (%) | Reduction in cross section on fracture Z (%) | As-Heat-Treated Condition | Brinell hardness (HBW) |
|---|---|---|---|---|---|---|
| 666 (≥) | 997 (≥) | 42 | 14 | 43 | Solution and Aging, Annealing, Ausaging, Q+T,etc | 121 |
| Temperature (°C) | Modulus of elasticity (GPa) | Mean co-eff. of thermal expansion | Thermal conductivity (W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Density (kg/dm³) | Poisson’s coefficient, ν |
|---|---|---|---|---|---|---|---|
| 31 | – | – |  |  | 0.44 | – |  |
| 525 | 957 | – | 42.3 | 411 |  | – |  |
| 951 | – | 21 | 21.2 |  |  | 444 | 444 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
These bolts are mainly made from iron mixed with carbon, chromium, molybdenum, and a few trace elements to boost their mechanical properties. This blend ensures they have high tensile and yield strength, impact resistance, and the capability to handle heavy loads without bending. Heat treatment enhances their hardness, wear resistance, and overall mechanical performance, making them perfect for high-pressure and high-temperature settings.
You’ll often find Alloy Steel Gr B6 Bolts in flanged joints, pipelines, pressure vessels, heavy machinery, and structural assemblies. They shine in applications that demand secure and durable fastening, especially under high-pressure, high-temperature, and chemically harsh conditions. Their strength, corrosion resistance, and long-term reliability make Alloy Steel Gr B6 Bolts the top choice for critical industrial and engineering fastening needs.
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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