Aatir Steel, based in Cairo, Egypt, is a well-respected manufacturer and supplier of top-notch Alloy Steel Grade B7 Washers. These washers are celebrated for their impressive strength, durability, and dependable performance, especially in tough industrial settings. Designed to work seamlessly with B7 bolts and studs, they ensure that loads are distributed evenly and help maintain the integrity of fastened assemblies, even under significant stress. Aatir Steel employs cutting-edge production methods and adheres to international quality standards, guaranteeing that their washers meet the high demands of industries like oil and gas, petrochemical, power generation, and heavy construction.
Made from chromium-molybdenum alloy steel, Alloy Steel Gr B7 Washers typically contain 0.37–0.49% carbon, 0.80–1.10% chromium, 0.15–0.25% molybdenum, along with other elements such as manganese and silicon. This specific composition provides the washers with outstanding mechanical strength and the ability to perform well at high temperatures. Grade B7 washers boast a minimum tensile strength of 860 MPa and a yield strength of 725 MPa, along with commendable hardness and toughness. They undergo heat treatment to enhance their mechanical properties and can endure corrosive environments and thermal stress, making them perfect for high-pressure and high-temperature applications.
| 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.
Alloy Steel Grade B7 Washers are commonly used alongside Grade B7 fasteners in flanged joints, pressure vessels, piping systems, and structural assemblies. Their main role is to evenly distribute loads and prevent loosening caused by vibration or thermal expansion. These washers are particularly vital in power plants, oil refineries, chemical plants, and heavy machinery, where reliable joint performance is crucial. Their resistance to oxidation and deformation under stress makes them a go-to choice in environments where safety, strength, and long-lasting durability are essential.
Aatir 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 Cairo, Egypt.
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