Product Description
High temperature strength steel hollow bar 4140 / 1.7225 / 709M40 / SCM440 / 42CrMo
1. Forged steel bar sizes we can offer;
Round bar: 200-1000mm
Square bar:150×150-600×600mm
Hollow bar OD:100-1200mm
Other forged parts: as per drawing
2.Supply condition for Forged steel bars:
Forged from vacuum degassed ingots.
Black /Rough Machined /Rough turned
3.Processing of forged steel hollow bar
EAF + LF + VD + Forged +Normalized+Rough Turned+ Heat Treatment (optional)
4. Forged Steel bar tolerance:
| Forged Bars | Forged sizes | Tolerance |
| Black | up to 500mm | (-0/+5mm) |
| above 500mm | (-0/+8mm) | |
| Rough Turned | all sizes | (-0/+3mm) |
5.The main grade we supply:
SAE 4140, SAE 4130, SAE 1045, SAE 1020, SAE 4340, SAE 8620,SAE 4145H
S20C,S45C,SCM440,C45,CK45, SCM435, H13,17CRNIMO6,AND SO ON
6.Quality control:
1. Melting Process: EAF/BOF+LF+VD resulting in ingots
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per SEP1921 Class C/c or D/d
7.MOQ: one piece per size/grade
8.Payment term: FOB CIF CFR EXW and so on
9.Delivery time : 7 to 30 days after deposit received.
