Thabiso Steel is a reliable manufacturer and supplier of top-notch fasteners, proudly based in Cape Town, South Africa. Known for their precision engineering and durability, Thabiso Steel focuses on Alloy Steel Gr B7 Washers, which are designed to meet the rigorous demands of industrial and structural applications. With a strong commitment to excellence and customer satisfaction, the company offers customized solutions for clients in various sectors, including oil & gas, construction, power generation, and petrochemicals. Their products adhere to international standards and undergo thorough quality control to guarantee reliability and performance, even in high-pressure situations. Thabiso Steel is your go-to partner for high-quality alloy steel components.
Alloy Steel Gr B7 Washers are crafted from AISI 4140/4142 alloy steel, celebrated for its strength and heat resistance. The typical composition features chromium (0.8–1.1%), molybdenum (0.15–0.25%), and carbon (0.37–0.49%). These washers boast impressive mechanical properties, including a minimum tensile strength of 125 ksi (860 MPa) and a yield strength of 105 ksi (725 MPa). They undergo heat treatment to boost hardness and durability, making them perfect for high-stress applications. With excellent resistance to wear, fatigue, and corrosion, these washers ensure long-lasting performance even in tough operating conditions.
| 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 Gr B7 Washers are frequently utilized in high-temperature and high-pressure settings where strength and reliability are essential. Common applications include oil and gas pipelines, chemical processing facilities, power generation plants, and large construction projects. They are perfect for securing flanges, valves, and pressure vessels, providing a tight and secure seal under extreme stress. These washers help evenly distribute loads and prevent bolt loosening, enhancing joint integrity and equipment safety. Their sturdy design and resistance to heat and corrosion make them a top choice in industries that demand long-lasting, high-performance fastening solutions.
ThabisoSteel 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 Cape Town, South Africa.
Copyright 2025 ThabisoSteel. All rights reserved
