1,Size of 4340 Alloy Steel
Round bar Diameter(mm) Length (mm)
20~800 3000~9000

Plate Thickness(mm) Width (mm) Length (mm)
Max:800 Max:2200 Max:9000
The specification can be customized.
2,Chemical Compositons
C Si Mn P S Cr Mo Ni
0.38-0.43 0.15-0.35 0.60-0.80 â?¤0.035 â?¤0.040 0.70-0.90 0.20-0.30 1.65-2.00
3,Features of 4340 alloy steel
1, Chromium molybdenum alloy steel;
2, High strength and toughness;
3, Good stability of hardenability and anti-overheating;
4, Good high tensile strength with shock resistance.

4,Typical Applications
1, Heavy machinery and high-load of shaft;
2, Rotor shaft and blades;
3, Special performance requirements of the vital parts after nitriding treatment.

Songshun Company Introduction
Located in Chang'an Town - the famous town of mould in Pearl River Delta;
Providing complete services from manufacturing and marketing to distributing;
Steel exported all over the world;
Service like peeling,milling,grinding,cutting and heat treatment etc...
All steel must pass high quality detection;
24/7 hours online service with quick response !