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 max. 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
Normalized 885 – 926°C. Austenized/ hardened 857 – 885°C. Tempered 650 – 704°C.
Weldability
Good.
Chemical Composition (Specific for Bars)
| Weight % | C | Mn | P | S | Si | Cr | Ni | Mo | Cu | V | Al |
| Min. | 0,28 | 0,80 | 0,20 | 0,85 | 0,15 | ||||||
| Max. | 0,33 | 1,20 | 0,020 | 0,025 | 0,35 | 1,20 | 0,50 | 0,25 | 0,35 | 0,10 | 0,035 |
Reference Standards
General:
-
NACE MR0175/ ISO 15156-3 and NACE MR0103/ ISO 17945
Bars:
-
ASTM A29 (for chemical only), type 75 ksi
Mechanical Properties (Specific for Bars – 75 ksi)
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HRC] |
Impact, Charpy-V, -30ºC [J] |
Impact, Charpy-V, -46ºC [J] |
|
| 75 ksi | ≥ 517 | ≥ 655 | ≥ 18 | ≤ 22 | ≥ 42 | ≥ 27 |
Round Bar Stock
| DIA |
| 3″ |
| 4″ |
| 130 mm |
| 6″ |
| 165 mm |
| 180 mm |
| 8″ |
| 8,5″ |
| 10″ |
| 12″ |
| 14″ |
| 16″ |
| 20″ |
Bored Bar Stock
| DIA |
| 130 mm OD x 3″ ID |
| 180 mm OD x 2.25″ ID |
| 180 mm 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