Forged Square Bar SNCM439

Hot forged flat bars

Grade:SNCM439

Similar grade:SAE4340,34CrNiMo6,718M40

Steel Ingot:EAF+LF+VD

Chemical compostion:

C:0.36/0.43; Si:0.15-0.35; Mn:0.60/0.90;P:Max 0.025;S:0.020/0.035;

Cr:0.60/1.00,Mo:0.15/0.30;Ni:1.60/2.00; Al:0.02/0.05;

Standard:  JIS

Grain Size:6-8

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

Delivery condition: Hot forged +Normalizing/Annealing+Rough Turned+ Quenching+ Tempering,.

Or Only forged of black surface bars.

Size: 150x150-650x650

Size tolerance:-0/+10mm;

Deviation : Max.2%, Corner " R" : 3-5mm, Max ( Aiming Shape Corner )
Length: 4.0m and up(Or fix length according the customer requirement).
Ultrasonic test: according to SEP 1921 C/c,D/d,E/e,A388 or GB/T 6402

Cut both ends

Other Steel Grade:

Carbon Steel:S20C,S26C,S35C,S45C,S50C,S55C,S60C;

Alloy Steel:SCM440,SCM420,SCM435,SCM415,SNCM220,SNCM439,SACM 645;

Tool Steel:SKD61.

Manufacturer:Jiangsu Zhuhong Forging Co.,Ltd