Mo-alloyed pressure vessel steel for service to 530 C. Standard for superheater headers and boiler drums at elevated temperature.
16Mo3 per EN 10028-2. Mo addition (0.25-0.35%) reduces creep rate and increases elevated temperature strength vs plain carbon grades. Standard boiler steel for superheater headers, drum shells and steam piping where service temperatures exceed capability of plain carbon steels.
| Standard Body | Designation | Country / Region | Note |
|---|---|---|---|
| EN 10028-2 | 16Mo3 / 1.5415 | EU | |
| ASTM | A335 P1 (nearest) | USA | |
| ASME | SA-335 P1 | USA | |
| DIN (obs.) | 15Mo3 / 1.5415 | Germany | |
| JIS | STBA12 | Japan | |
| GOST | 16M | Russia | |
| JUS | C.0454H | Yugoslavia | Mo legirni kotlarski celik; JUS B.B3.010 |
| # | Standard Body | Designation | Country / Region | Note |
|---|---|---|---|---|
| 1 | EN 10028-2 | 16Mo3 / 1.5415 | EU | — |
| 2 | ASTM | A335 P1 (nearest) | USA | — |
| 3 | ASME | SA-335 P1 | USA | — |
| 4 | DIN (obs.) | 15Mo3 / 1.5415 | Germany | — |
| 5 | JIS | STBA12 | Japan | — |
| 6 | GOST | 16M | Russia | — |
| 7 | JUS | C.0454H | Yugoslavia | Mo legirni kotlarski celik; JUS B.B3.010 |
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Carbon | C | 0.1200 | 0.2000 | 0.1600 |
| Manganese | Mn | 0.4000 | 0.9000 | 0.6500 |
| Molybdenum | Mo | 0.2500 | 0.3500 | 0.3000 |
| Condition | Code | Rm min MPa | Rm max MPa |
Re min MPa | Re max MPa |
A₅ min % |
Z % |
KV J |
HB min | HB max | HRC min | HRC max | E GPa |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Normalized t<=16mm | +N | 450 | 600 | 275 | — | 22.0 | — | — | — | — | — | — | 210.0 |
| Coolant | Soluble oil 5-8% |
| Chip Formation | Medium chips |
| Tool Material | Carbide P20 |
| Surface Finish | Ra 1.6-3.2 um |