Alloy Steel Grade 10.9 washers are robust components specifically engineered to ensure effective load distribution and resist vibrations in crucial bolted connections. According to ISO 898-2 standards, Gr 10.9 signifies that these washers are constructed from quenched and tempered alloy steel, which provides impressive tensile strength and outstanding mechanical performance. You’ll often find them paired with Grade 10.9 bolts in demanding applications across sectors like automotive, construction, heavy equipment, and industrial machinery. These washers play a vital role in preventing loosening from dynamic loads, boosting clamping force, and safeguarding the joint surface from damage in high-stress situations.
The chemical makeup of Alloy Steel Gr 10.9 washers generally consists of medium carbon steel, enhanced with alloying elements like manganese, chromium, and molybdenum, all of which contribute to increased hardness and tensile strength. To meet the mechanical properties outlined by ISO standards, these washers undergo heat treatment, achieving a minimum tensile strength of 1040 MPa and a yield strength of 940 MPa. They also exhibit good hardness, typically falling within the range of 32–39 HRC. The meticulous manufacturing and heat treatment processes ensure that these washers maintain high dimensional accuracy, consistent hardness, and durability, even when faced with ongoing mechanical and thermal stress.
| 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 10.9 | 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 |
|---|---|---|---|---|---|
| 10.9 | 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 10.9 washers find extensive use in applications that require high preload and resistance to loosening, such as engine assemblies, suspension systems, structural steel joints, wind turbines, and high-load machinery. In the automotive industry, they are crucial for wheel assemblies, drivetrain components, and brake systems. In industrial and construction settings, they are employed in bolted connections that endure vibrations, shear forces, or fluctuating loads. Their remarkable mechanical properties make them a go-to choice where safety and performance are paramount.
Filiz 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 Istanbul, Turkey.
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