SUPER 13CR / UNS S41425 / UNS S41426
MATERIAL DESCRIPTION
The grade is developed from the standard 13Cr grade and offer enhanced mechanical properties and corrosion resistance. The low carbon improves weldability whilst maintaining the martensitic microstructure.
BGH s13Cr-110 ksi has been qualified according to NACE 0175-3 annex B and NORSOK M650. General hardness requirement is 32 HRC. From surface to 3mm below surface 33 HRC is qualified and approved.
Applications
Commonly used in the same area as AISI 4130, 4140 and 4145 but often in environment, which have a high content of sulfur.
Heat Treatment
Hardened and tempered.
Weldability
Moderate.
Chemical composition
| Weight % | C | Si | Mn | Cr | Ni | Mo | Cu | N | Ti | V | S | P | |
| Min. | S41425 | 0,50 | 12,00 | 4,00 | 1,50 | 0,06 | |||||||
| Max. | 0,05 | 0,50 | 1,00 | 15,00 | 7,00 | 2,00 | 0,30 | 0,12 | 0,005 | 0,020 | |||
| Min. | S41426 | 11,50 | 4,50 | 1,50 | 0,01 | ||||||||
| Max. | 0,03 | 0,50 | 1,00 | 13,50 | 6,50 | 3,00 | 0,50 | 0,50 | 0,005 | 0,020 |
Product Standards: 95ksi or 110ksi yield strength, mid radial material.
Approvals: NACE MR 0175 for 95ksi type.
Mechanical properties
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HRC] |
Impact, Charpy-V, -10ºC [J] |
||
| S41425 | Min. | 750 (110 ksi) | 862 (125 ksi) | ≥ 16 | ≥ 60 | |
| Max. | 862 (125 ksi) | ≤ 32/33 | ||||
| S41426 | Min. | 655 (95 ksi) | 724 (105 ksi) | ≥ 18 | ≥ 60 | |
| Max. | 724 (105 ksi) | ≤ 27 |
Round bar stock – MIN YLD 95 KSI
| DIA |
| 3″ |
| 4″ |
| 5″ |
| 6″ |
| 7″ |
| 8″ |
| 8.5″ |
Round bar stock – MIN YLD 110 KSI
| DIA |
| 3″ |
| 4″ |
| 5″ |
| 6″ |
| 7″ |
| 8″ |
| 8.5″ |
| 9″ |
| 10″ |
Equivalent standards
- EN 1.4415
- UNS S41425
- UNS S41426
- DIN X2CrNiMoV13-5-2