Yousef Steel, a leading manufacturer and supplier located in Riyadh, Saudi Arabia, proudly offers high-quality **Alloy Steel Grade 10.9 bolts**. These bolts are specifically designed for **high-strength fastening solutions** in critical applications across various sectors, including **automotive, heavy machinery, construction, oil & gas**, and **industrial manufacturing**. Built to endure **extreme mechanical stress, dynamic loads, and vibrations**, they ensure reliable and secure connections.
Crafted from **medium carbon alloy steel**, Grade 10.9 bolts undergo a **quenching and tempering** process to achieve exceptional mechanical properties, boasting a **minimum tensile strength of 1040 MPa** and a **yield strength of 940 MPa**, all in line with **ISO 898-1 standards**. This impressive strength makes them perfect for **high-load bearing and safety-critical assemblies**.
| Grades | Grade 10.9 Bolt |
|---|---|
| Standard | ASTM A324, ASME SA324 |
| Size | Dia M 20 to 100 mm Inch 3/4“Â to 3.1/2″ |
| finish | Zinc plated / Plain / Hot dip galvanised |
| Carbon Steel 10.9 | C | P | S | B |
|---|---|---|---|---|
| 0.20-0.55 | 0.025 | 0.025 | 0.003 |
| Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
|---|---|---|---|---|---|
| Class 10.9 | 5–100 | 830 | 940 | 1040 | C33–39 |
| Class and Material | Nominal Size Range (mm) | Mechanical Properties | ||
|---|---|---|---|---|
| Proof Load (MPa) | Min. Yield Strength (MPa) | Min. Tensile Strength (MPa) | ||
| Class 10.9 Alloy steel, quenched and tempered | 5mm – 100mm | 830 | 940 | 1040 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Yousef Steel provides these bolts in a variety of types, including **hex head bolts, socket head cap screws, and heavy hex bolts**, available in both **metric and imperial sizes**. We also offer multiple surface finishes such as **zinc plating, black oxide, hot-dip galvanizing**, and **PTFE coatings** to enhance corrosion resistance and extend service life.
AS Gr 10.9 Bolts are high-strength fasteners used in applications where higher tensile strength and durability are required. They are widely used in automotive, construction, aerospace, heavy machinery, railway and oil & gas industries. They provide secure fastening of structural components, engine assemblies and heavy-duty machinery. Their resistance to wear, stress and vibration makes them ideal for demanding environments. Delivering consistent performance in high-pressure and high-load applications across various industrial applications.
Yousef 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 Riyadh, Saudi Arabia.
Copyright 2025 Yousef Steel. All rights reserved
