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This chromium-molybdenum alloy is one of the most widely used aircraft steels because of its combination of weldability, ease of fabrication, and mild hardenability. In relatively thin sections it will respond to heat treatment to high strength levels and yet in the normalized condition it has adequate strength for many applications. When resistance to wear and abrasion is required, it may be nitrided.
This grade is a quality product melted under the best steelmaking practices for aircraft quality steels. It is vacuum degassed to meet the magnetic particle inspection standards of AMS 2301.

UNS G41300, MIL-S-6758 - AMS 6370 - AMS 2301

Physical Conditions F
Surface Condition 4

Stock Lengths 12' and 20'
Unit of Measure
Items Squares
1/4
4130 Aircraft Heat Treated, Cold Finished & Stress Relieved Alloy Bars - Squares
Squares
5/16
4130 Aircraft Heat Treated, Cold Finished & Stress Relieved Alloy Bars - Squares
Squares
3/8
4130 Aircraft Heat Treated, Cold Finished & Stress Relieved Alloy Bars - Squares
Squares
7/16
4130 Aircraft Heat Treated, Cold Finished & Stress Relieved Alloy Bars - Squares
Squares
1/2
4130 Aircraft Heat Treated, Cold Finished & Stress Relieved Alloy Bars - Squares
Estimated Weight per Foot N/A .2127 lb N/A .3323 lb N/A .4786 lb N/A .6514 lb N/A .8508 lb
Estimated Weight 12-Ft. Bar N/A 2.552 lb N/A 3.988 lb N/A 5.743 lb N/A 7.817 lb N/A 10.21 lb