Alloy Steel Grade 10.9 fasteners are robust mechanical components crafted from quenched and tempered alloy steel, specifically designed to comply with ISO 898-1 standards for both structural and industrial uses. The designation “10.9” signifies a fastener that boasts a minimum tensile strength of 1040 MPa and a yield strength of 940 MPa, making it ideal for high-stress situations. These fasteners find their place in various sectors, including automotive, construction, machinery, and engineering, where strength, durability, and resistance to mechanical stress are paramount. You can find Grade 10.9 fasteners in several forms, such as bolts, screws, studs, and threaded rods.
When it comes to their chemical makeup, Alloy Steel Grade 10.9 fasteners typically feature a medium carbon content (ranging from 0.25% to 0.55%) along with alloying elements like manganese, chromium, and molybdenum. These components enhance the fastener’s hardenability, strength, and toughness. Through a quenching and tempering process, their mechanical properties are significantly improved, including fatigue resistance, shear strength, and hardness, which usually falls between 32 and 39 HRC. Depending on the specific application and performance needs, these fasteners may also receive coatings, such as zinc plating or black oxide, to boost corrosion resistance.
Standard : DIN EN ISO 4014 & 4017 DIN 931 / 933 & IS 1364 / IS 1363
Size : Dia M 20 to 100 mm / Inch 3/4″to 3.1/2″
Finish : Plain / Zinc plated / Hot dip galvanised
Types : Nuts, Bolts, Screws, Sockets, Studs, Screw, Hex Set Screw, Socket Screw, Cap Screw, Pan Head Screw, Socket Head Cap Screw, Washers, Spring Washers, Studs, Anchors
| Alloy Steel 10.9 | C | Mn | Si | P | S | Mo | Cr |
| 0.08-0.15 | 1.00 max | 1.00 max | 0.040 | 0.030 | 0.15-0.25 | 11.50-13.50 |
| Grades | Size Range | PS [MPa] | YS (min) [MPa] | TS (min) [MPa] | Hardness [Rockwell] |
| Class 10.9 | 5–100 | 830 | 940 | 1040 | C33–39 |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Hexagon Bolts / Set Screws | Stud Bolts | Hexagon Nuts | Socket Capscrews |
|---|---|---|---|
DIN 931 | BS4882 | DIN 934 | DIN 912 |
DIN 933 | DIN 976 | BS 1768 | DIN 6912 |
BS 1768 | BS 1769 | DIN 7984 | |
UNI 5731 | BS 1083 | ANSI B18.3 | |
UNI 5739 | BS 3692 | ISO 4762 | |
ISO 4014 | ISO 4032 | UNI 5931 | |
ISO 4017 | ISO 4033 | BS 2470 | |
BS 1769 | ANSI B18.2.2 | BS 4168 | |
BS 3692 | |||
ANSI B18.2.1 | |||
Socket & Slotted Set Screws | Socket & Slotted Countersunk Screws | Studs | Washers |
DIN 913 | DIN 963 | DIN 938 | DIN 125 |
DIN 914 | DIN 7991 | DIN 939 | DIN 9021 |
DIN 915 | BS 4168 | DIN 2510 | BS 4320 |
DIN 916 | BS 1981 | BS 4439 | BS 3410 |
DIN 551 | BS 483 | BS 2693 | |
DIN 553 | BS 2470 | Spring Washers | |
DIN 438 | DIN 127 | ||
BS 4168 | BS 4464 | ||
BS 1802 |
In practical terms, Alloy Steel Grade 10.9 fasteners are frequently utilized in scenarios that demand secure, load-bearing joints capable of enduring vibration, torque, and dynamic loads. In the automotive sector, they play a crucial role in essential components like engine mounts, suspension systems, and chassis assemblies. In structural and industrial contexts, you’ll find them in steel constructions, machinery setups, wind turbines, and equipment where reliability under stress is a must. Their impressive strength-to-weight ratio, precision, and performance in extreme conditions make them a go-to choice for engineers and manufacturers alike.
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.
Copyright 2025 Filiz Steel. All rights reserved
