1.Forged Round Bar (SAE4340)
2.Size: 90mm~800mm
3.Length: 4.0m and up(Or fix length according the customer requirement).

1.Item:Forged Round Bar

2.Standard: E ASTM A370

3.Grade: SAE4340 , Similar grade: 34CrNiMo6, 817M40, SNCM439 

4.Chemical compostion: 
C: 0.38/0.43; Si: 0.15-0.35; Mn: 0.60/0.80; P: Max 0.025; S: 0.020/0.035; 
Cr: 0.70/0.90, Mo: 0.20/0.30; Ni: 1.65/2.00 Al: 0.02/0.05;

5.Delivery condition: Hot forged +Normalizing/Annealing+Rough Turned+ Quenching+ Tempering, . 
Or Only forged of black surface bars.

6.Brinell Hardness: Quenched and tempered: 280HB-320HB

7.Inspecting: UTS according to SEP 1921 C/c, D/d, E/e, A388 or GB/T 6402 

8.Other Steel Grade: 
Carbon Steel: SAE1020, SAE1045, SAE1050, SAE1060; SAE1018 
Alloy Steel: SAE8620, SAE4130, SAE4340, SAE4140, SAE5140; SAE9840, 
Tool Stee; : H13 

9.HS:7304199000

10.High quality and service

11.your any question is welcomed