AISI 420 MOD / UNS S42000
MATERIAL DESCRIPTION
AISI 420 Mod is a martensitic 13Cr modified stainless steel with increased strength and hardness compared to standard 13Cr versions. It is used in the quenched and tempered condition.
Applications
AISI 420 Mod is a widely used in the manufacture of oil industry completion equipment such as packers, valves and pressure containing parts. Is suitable for constructional and fastener applications where moderate corrosion resistance is required.
Heat Treatment
Hardened and tempered.
Weldability
Moderate.
Chemical composition
| Weight % | C | Si | Mn | Cr | Mo | Ni | S | P |
| Min. | 0,18 | 0,25 | 0,25 | 12,50 | ||||
| Max. | 0,22 | 1,00 | 1,00 | 14,00 | 0,30 | 0,20 | 0,005 | 0,02 |
Approvals: NACE 0175/ ISO 15156/1, 18- 22HRC, QDT 217/235 BHN
Mechanical properties
| Yield strength Rp0.2, MPa |
Tensile strength Rm, MPa |
Elongation [%] |
Hardness [HRC] |
Impact, Charpy-V, -10ºC [J] |
|
| Min. | 550 (80 ksi) | 689 (100 ksi) | 20 | 20 | |
| Max. | 655 | ≤ 22 |
Round bar stock – MIN YLD 80 KSI
| DIA |
| 2″ |
| 3″ |
| 90 mm |
| 4″ |
| 4″ |
| 4.75″ |
| 5″ |
| 5.25″ |
| 5.5″ |
| 6″ |
| 6.5″ |
| 7″ |
| 7.25″ |
| 7.5″ |
| 8″ |
| 8.5″ |
| 9″ |
| 9.5″ |
| 10″ |
| 11″ |
| 12″ |
Hollow bored bar stock – MIN YLD 80 KSI
| MEASUREMENTS |
| 6″ OD x 3″ ID |
| 6″ OD x 4″ ID |
| 6.25″ OD x 3.5″ ID |
| 6.5″ OD x 2.5″ ID |
| 7″ OD x 4″ ID |
| 8″ OD x 3″ ID |
| 8″ OD x 4″ ID |
| 8″ OD x 5.75″ ID |
| 8.5″ OD x 4″ ID |
| 8.5″ OD x 5.5″ ID |
| 10″ OD x 3″ ID |
| 10″ OD x 150mm ID |
Equivalent standards
- EN 1.4021
- UNS S42000
- AISI 420 Mod