Alloy Steel Gr B7 Washers are robust, precision-crafted components designed to evenly distribute loads, prevent loosening, and safeguard surfaces in bolted assemblies. Crafted from high-quality alloy steel that includes elements like chromium and molybdenum, these washers boast impressive tensile strength, hardness, and resistance to wear, corrosion, and extreme temperatures. With their tight dimensional tolerances and smooth finishes, Gr B7 Washers deliver dependable performance in tough industrial, mechanical, and structural settings, ensuring secure and long-lasting fastening solutions.
Alloy Steel Gr B7 washers are of chromium-molybdenum steel, i.e., contain iron (Fe) with the addition of carbon (C), manganese (Mn), phosphorus (P), sulfur (S), silicon (Si), chromium (Cr), and molybdenum (Mo). The mechanical properties of such washers are very good and possess high tensile strength of 125 ksi min, yield strength of 105 ksi min, and a hardness of Rockwell C35 max. They provide better wear resistance, hardness, and strength, which qualify them for heavy-duty applications under high pressure and temperature in building, automotive, and heavy machine industries. Their corrosion resistance may be improved using coatings such as zinc or galvanization.
| Specifications | : | ASTM A 194 ASME SA 194 |
| Standard | : | IS, ASTM, BS and all International Standards |
| Length | : | 3 mm to 200 mm |
| Size | : | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
| Type | : | Flat Washer, Lock Washer, Sealing Washer, Split Washer, Slot Washer, Machine Washer, Star Washer SPRINGS – Wire Spring & Flat Spring. |
| Alloy Steel GR 7 | C | Mn | P | S | Si | Mo | Cr |
| 0.37-0.49% | 0.65-1.10% | 0.04% | 0.04% | 0.15-0.035% | 0.15-0.25% | 0.75-1.20% |
| Grade | Size | Tensile ksi, min | Yield, ksi, min | Elong, %, min | RA % min |
|---|---|---|---|---|---|
| B7 | 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.
You’ll often find Alloy Steel Gr B7 Washers in pipelines, flanged joints, pressure vessels, heavy machinery, and structural assemblies. They excel at distributing bolt loads in various industries, including oil and gas, power generation, and petrochemicals. Thanks to their strength, corrosion resistance, and long-term reliability, Alloy Steel Gr B7 Washers are the go-to choice for critical fastening solutions that demand secure, durable, and high-performance components.
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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