AISI 4130 MODIFIED / UNS G41300
MATERIAL DESCRIPTION
AISI 4130 is a low alloy C-steel containing chromium and molybdenum as strengthening agents. It has low carbon content, and hence it can be welded easily. It is supplied as round bar commonly in the hardened and tempered condition with a hardness of 18-22 HRc.
Applications
AISI 4130 is a low alloyed, hardened and tempered steel used for oil & gas drilling and production equipment – wellhead and christmas tree equipment.
Heat Treatment
Hardened at 860°C followed by water quenching. Tempering at min. 650°C, cooled in air.
Weldability
Good.
Chemical composition
| Weight % | C | Si | Mn | Cr | Mo | S | P |
| Min. | 0,28 | 0,15 | 0,40 | 0,80 | 0,15 | ||
| Max. | 0,33 | 0,35 | 0,60 | 1,10 | 0,25 | 0,035 | 0,025 |
Product Standards: ASTM A29 (4130), UNS G41300.
Approvals: NACE MR0175 when hardness is 22 HRC max., API 6A.
Mechanical Properties: Bar
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HRC] |
Impact, Charpy-V, -32ºC [J] |
|
| 60 ksi | ≥ 414 | ≥ 586 | ≥ 18 | 22 MAX | ≥ 42 |
| 75 ksi | ≥ 517 | ≥ 655 | ≥ 17 | 22 MAX | ≥ 42 |
Round bar stock – MIN YLD 75 KSI
| DIA |
| 3″ |
| 4″ |
| 130 mm |
| 6″ |
| 165 mm |
| 180 mm |
| 8″ |
| 8,5″ |
| 10″ |
| 12″ |
| 14″ |
| 16″ |
| 20″ |
Bored bar stock – MIN YLD 75 KSI
| DIA |
| 130mm OD x 2.25″ ID |
| 130mm OD x 3″ ID |
| 6.5″ OD x 2.25″ ID |
| 180mm OD x 2.25″ ID |
| 180mm OD x 2.13/16″ ID |
| 8″ OD x 2.25″ ID |
| 8″ OD x 3″ ID |
| 10″ OD x 3″ ID |
| 12″ OD x 3″ ID |
Equivalent standards
- EN 1.7220
- UNS G41300
- AISI 4130 Modified