ISO/TR 15608 Material Group 6.2: Cr-Mo-V such 13CrMoV9-10
Steels with 0,75 % ≤ Cr < 3,5 %, 0,7 < Mo ≤ 1,2 % and V ≤ 0,35 %
Features of low alloyed Cr-Mo-V steel (2.25Cr-1Mo-0.25V)
CrMo (V) steels with 0.25 % V offer better performance for petrochemical reactors compared to 10CrMo9-10 steels that means the specified yield strength and creep properties for this material is better compared to 10CrMo9-10 steel.
Applications for low alloyed Cr-Mo-V (13CrMoV9-10) steel
This material may be used in all applications requiring service conditions under high temperature and high pressure of hydrogen.
Is particularly suitable for pressure equipment in high temperature hydrogen service (e.g. hydrotreating reactors, exchangers, hydrotreating reactors, hydrodesulfurizers, hydrocrackers)
Welding conditions for 13CrMoV9-10 steel
Welding needs precautions, in particular: tight control of preheat, interpass temperature intermediate stress relieving and post weld heating to avoid cold cracking;
However, the risk of cold cracking is known to occur in the weld metal more frequently than in the HAZ. Therefore, a preheat and minimum interpass temperature of 200°C is recommended for thickness higher than 30 mm. After welding a Dehydrogenation Heat Treatment ≥ 140 °C is recommended. After welding, these steels generally have to be PWHT e.g. 680 °C.
Typical materials in group 6.2
| Name/Type | Number | Standard | Product | Remark |
|---|---|---|---|---|
| 7CrMoVTiB10-10+NT | 1.7378 | EN 10216-2 | Smls. tube | EN 13445-2 |
| 7CrWVMoNb9-6+NT | 1.8201 | EN 10216-2 | Smls. tube | EN 13445-2 |
| F3V F3V 3V 3V C, Cl. 1 C, Cl. 2 C, Cl. 3 C, Cl. 4 C, Cl. 4a 21V | K31830 K31830 K31830 K31830 K31830 K31830 K31830 K31830 K31830 K31830 | ASTM A-182 ASTM A-336 ASTM A-508 ASTM A-541 ASTM A-542 ASTM A-542 ASTM A-542 ASTM A-542 ASTM A-542 ASTM A-832 | Forging Forging Forging Forging Plate Plate Plate Plate Plate Plate | ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| 13CrMoV9-10+NT 13CrMoV9-10+QT F22V F22V 22V D, Cl. 4A 22V | 1.7703 1.7703 K31835 K31835 K31835 K31835 K31835 | EN 10028-2 EN 10028-2 ASTM A-182 ASTM A-336 ASTM A-541 ASTM A-542 ASTM A-832 | Plate Plate Forging Forging Forging Plate Plate | EN 13445-2 & EN 13480-2 EN 13445-2 & EN 13480-2 ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| 12CrMoV12-10+NT 12CrMoV12-10+QT F3VCb 3VCb F3VCb 3VCb E, Cl. 4a | 1.7767 1.7767 K31390 K31390 K31390 K31390 K31390 | EN 10028-2 EN 10028-2 ASTM A-182 ASTM A-336 ASTM A-508 ASTM A-541 ASTM A-542 | Plate Plate Forging Forging Forging Forging Plate | EN 13445-2 & EN 13480-2 EN 13445-2 & EN 13480-2 ASME BPVC ASME BPVC ASME BPVC ASME BPVC ASME BPVC |
| G17CrMoV5-10 | 1.7706 | EN 10213 | Casting | EN 13445-2 |
| 23V | – | ASTM A-832 | Plate | ASME BPVC |
| 8 | J11697 | ASTM A-356 | Casting | ASME BPVC |
| 9 | J21610 | ASTM A-356 | Casting | ASME BPVC |