4140 Product Guide

Applications | Specifications | Mechanical and Chemical Data | Tolerances

Overview

This alloy has high strength, high fatigue strength, toughness, torsional strength, and impact and abrasion resistance. Additionally, 4140 steel is highly ductile when annealed, though it requires more pressure as it is tougher than most carbon steels. 4140 is easily welded, but if this is done after hardening, it will also require a post weld heat treatment. This material is typically used in aerospace, oil, gas, automotive, agricultural, and defense industries, specifically gears, shafts, spindles, fixtures, and collars.

 

Common Trade Names

UNS G41400, AISI 4140, C4140, Alloy Steel

Other Resources

Weight Calculator | Mill Test Reports

Products

4140 Sheet/Plate | 4140 Round Bar | Round Tube 4140 Metric

Applications

• Aerospace
• Oil & Gas industrial parts
• Automotive
• Agriculture
• Defense Industry
• Gears
• Shafts

Specifications

ASTM
A108