4130-75K PX Forged Alloy Steel Round Square Bar
H2S Service Min 75K Yield, Hardness 18-22 HRC Refer EM-QC-03 Latest Edition
Delivery condition : Forged + Normalized + Rough Turned + Q/T. Temperature class P+X
1. 4130 Forged steel bar sizes we can offer;
| Round bar: | 200-1000mm |
| Square bar: | 150×150-600×600mm |
| Other forged part | as per drawing |
2.Supply condition for AISI 4130 Forged steel bars:
Forged from vacuum degassed ingots.
Black /Rough Machined /Rough turned
3.Processing of 4130 forged steel
EAF + LF + VD + Forged +Normalized+Rough Turned+ Heat Treatment (optional)
4. Forged Steel round bar tolerance:
| Forged Bars | Forged sizes | Tolerance |
| Black | up to 500mm | (-0/+5mm) |
| above 500mm | (-0/+8mm) | |
| Rough Turned | all sizes | (-0/+3mm) |
5. ASME SA479 AISI 4130 Round Bar Equivalent Standards
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | EN |
| AISI 4130 | 1.7218 | G41300 | JIS G4105 | BS 970 | 25CrMo4 |
6. Chemical Composition of AISI 4130 Bars / Rods
| Grade | C | Mn | Si | S | N | Ni | Cr | Fe | Mo | P |
| AISI 4130 | 0.28-0.33 | 0.40-0.60 | 0.15-0.35 | 0.025 Max | - | 0.50 Max | 0.80-1.10 | 97.3-98.22 | 0.15-0.25 | 0.035 Max |
Mechanical Properties of ASTM A479 AISI 4130 UNS G41300 Round Bar
| Element | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| AISI 4130 | 0.28 | 2580 | 560 MPa | 460 MPa | 20 % |
7. Application
This low-alloy steel finds many applications as forgings in the aerospace and oil and gas industries - as forged valve bodies and pumps -, as well as in the automotive, agricultural and defense industries.
8.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
9.Heat treatment of SCM430 / AISI 4130
