Low-temperature structural steels
Low-temperature structural steels are structural steels designed to retain toughness and reliable load-bearing performance in cold service. Their resistance to brittle fracture at low temperatures makes them suitable for structures, pressure-containing equipment and other components exposed to severe cold.
| Grade | Material no. | C | Si | P | S | Mn | Mo |
|---|---|---|---|---|---|---|---|
| 13MnNi6-3 | 1.6217 | ≤0,16 | ≤0,50 | 0,025 | 0,015 | 0,85-1,70 | — |
| 15NiMn6 | 1.6228 | ≤0,18 | ≤0,35 | 0,025 | 0,015 | 0,80-1,50 | — |
| X7NiMo6 | 1.6349 | ≤0,10 | ≤0,35 | 0,025 | 0,02 | 0,60-1,40 | 0,20-0,35 |
| 30CrMo4 | 1.7216 | 0,27-0,34 | ≤0,35 | 0,035 | 0,035 | 0,35-0,60 | 0,15-0,30 |
| 26CrMo4-2 | 1.7219 | 0,22-0,29 | ≤0,35 | 0,03 | 0,025 | 0,50-0,80 | 0,15-0,30 |
Standards covering this category
17Property ranges
10| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| ReH | N/mm² | 265 | 750 | 8 |
| Rm | N/mm² | 380 | 1800 | 39 |
| A80 | % | 13 | 13 | 1 |
| Re | N/mm² | 205 | 590 | 29 |
| A | % | 10 | 35 | 34 |
| Z | % | 30 | 38 | 3 |
| HB | — | 179 | 223 | 2 |
| HRB | — | 85 | 90 | 2 |
| HV | — | 210 | 210 | 1 |
| rho | g/cm³ | 7.85 | 7.85 | 26 |
Derived from 39 grades in this category with a recorded value.
Composition range
12| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| C | % | 0.06 | 0.78 | 55 |
| Al | % | 0.02 | 0.3 | 3 |
| Si | % | 0.1 | 0.6 | 55 |
| P | % | 0.015 | 0.035 | 55 |
| S | % | 0.005 | 0.035 | 55 |
| V | % | 0.01 | 0.05 | 11 |
| Cr | % | 0.15 | 1.2 | 8 |
| Mn | % | 0.3 | 1.7 | 55 |
| Ni | % | 0.3 | 10 | 37 |
| Cu | % | 0.3 | 0.3 | 2 |
| Nb | % | 0.05 | 0.05 | 2 |
| Mo | % | 0.1 | 0.35 | 9 |
Derived from 55 grades in this category with a recorded value.