4140 Steel Bar
Chromium-molybdenum deep hardening steel.
We stock 4140 steel bars, a deep hardening steel that is tough and fatigue-resistant.
4140 alloy is used in components requiring high hardness, toughness, and fatigue resistance. As a high-tensile steel product, the material is used in applications for industries including aerospace, oil & gas, and automotive. Nitriding of the alloy is possible, resulting in improved fatigue and wear-resistant characteristics.
Fatigue Strength
Alloy 4140 provides high fatigue strength making the product suitable for critically stressed components at normal and elevated temperatures. Good overall strength and impact toughness are also performance benefits. Overall machinability of the alloy is good in the annealed condition. Uniform hardness and high strength are achieved due to the introduction of molybdenum, while chromium provides good hardness characteristics. Alloy 4140 also offers good ductility.
Stock Availability
We stock 4140 steel bars in various sizes and conditions (including annealed, normalised, hardened and tempered conditions).
Ultrasonic Inspection
As part of our commitment to quality, we offer ultrasonic inspection services which accurately test your materials for hidden defects.
Discover
- 1.7725
- 42CRmo4
- 709M40
- AMS 6349, AMS 6382, AMS 6529
- AMS S5626, MIL-S-5626
- ASTM A108
- ASTM A29
- ASTM A331, ASTM A332, ASTM A370
- UNS G41400
- Milling spindles
- Couplings
- Gears
- Crankshafts
- Good impact toughness
- Good machinability
- Fair weldability
- Good ductility
