alloy steel 4340

Specifications

alloy steel 4340
1)Dia 20-650mm,length 1.6-6m
2)Technique: Hot rolled or forged
3)Surface: Black or machined
4)4340

ALLOY STEEL 4340

1.6582 STEEL

SAE 4340/40CrNiMo Alloy steel round bar

 

1) Delivery condition:

Hot rolled or forging, black surface, and Annealed, Hardness: ≤220HB

 

2) Chemical composition:

C=0.37~0.44,Si=0.17~0.37,Mn=0.50~0.80,Cr=0.60~0.90,Mo=0.15~0.25, Ni=1.25~1.65,P≤0.025,S≤0.025,Cu≤0.25

 

3) Specification:

Diameter: 20/35/40…650mm,Length:2000~5800mm;

or as customers’ request.

 

4) Payment terms:

30% deposit, balance against L/C at sight or T/T.

 

5) Inspection:

Ultrasonic test standard: SEP1921/84 GR.3 CLASS C/C

 

6) Application:

For vane, shaft, bolt of large dia steamer