In the heart of Kinshasa, Yoane Steel stands as a dedicated partner for the region’s industrial growth, providing essential high-strength components to demanding sectors. We take pride in supplying the Alloy Steel Gr B7M Washer, a critical fastener engineered for projects where failure is not an option. This washer is meticulously manufactured to meet rigorous international standards, offering our clients in the Congo and beyond the reliability required for infrastructure and energy projects that form the backbone of our modern landscape.
What defines the Alloy Steel Gr B7M Washer is its specialized composition and resulting toughness. It’s crafted from a chromium-molybdenum steel alloy, which undergoes a precise quench and tempering heat treatment. This process is key to developing its superior strength and a crucial resistance to sulfide stress corrosion cracking. This specific property ensures it can handle high tensile loads while withstanding the harsh, corrosive environments often encountered in critical applications, providing a steadfast level of security.
| Specifications | : | ASTM A 193 ASME SA 193 |
| 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 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.
The primary use for this robust washer is in high-pressure bolting systems, particularly within the oil and gas industry for flanges, valves, and wellhead equipment where sour service conditions are present. Its high strength and corrosion resistance also make it indispensable for major construction projects, such as bridges and high-rise buildings, and within the power generation sector. Essentially, wherever structural integrity and safety are paramount under challenging conditions, the Alloy Steel Gr B7M Washer plays a vital, often unseen, role.
Yoane 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 Kinshasa, Congo.
Copyright 2025 Yoane Steel. All rights reserved
