1.Standard
Material specification: NationalStandard:GB/T 1220 S30403
Size specification: NationalStandard: YB/T 5309
2. Chemical Composition
S30403 Chemical Composition %
| Elements | C | Mn | P | S | Si | Cr | Ni | N |
| Min | 18.00 | 8.00 | ||||||
| Max | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 20.00 | 12.00 | 0.1 |
| Actual value | 0.015 | 1.12 | 0.018 | 0.004 | 0.52 | 18.68 | 10.32 | 0.03 |
3. Mechanical Properties
S30403 Mechanical Properties
| Mechanical properties |
Tensile strength MPa |
Yield
strength
MPa |
Hardness HBW |
Elongation（longitudinal） % | Grain Size |
| Min（Mechanical properties） | 480 | 175 | 40 | ||
| Max（Mechanical properties） | 187 | ||||
| Actual value | 508 | 323 | 166 | 48 | 7.5 |
4. Typical Size
| Size | Size tolerance | ||
| A | A | t | |
| 50*50*5 | 50±2 | 50±2.0 | 5±0.6 |
5. Typical Application Environment
It is mainly used in the emergency residual heat removal cooler of nuclear power plant.