1. Stainless Steel Grade 441 Summary
Stainless steel grade 441 has very low C and N, adding Ti and Nb to improve the material’s high-temperature strength, corrosion resistance, weldability, and workability.
POSCO specially developed steel grade.
2. Features of 441 Stainless Steel
1) High-temperature corrosion resistance;
2) Weldability;
3) High-temperature strength;
4) Magnetic;
5) Excellent processability.
3. Scope of Application
Exhaust manifold, front pipe, CONVERTER, etc. of the automobile exhaust system.
4. Chemical Composition (wt%)
Chemical composition | C | Si | Mn | P | S | Cr | Nb | Ti |
Standard | ￡0.03 | ￡1.0 | ￡1.0 | ￡0.04 | ￡0.015 | 17.5~18.5 | 3C+0.3~1.0 | 0.1~0.6 |
General | 0.008 | 0.3 | 0.2 | 0.022 | 0.002 | 18.3 | 0.5 | 0.2 |
5. Stainless Steel Grade 441 Performance
Distinguish | Mechanical Properties | |||
Ys (Mpa) | Ts (Mpa) | El (%) | Hv | |
Standard | ≥ 250 | 430~630 | ≥ 25 | ≤ 175 |
| General | 290 | 460 | 32 | 155 |
6. Stainless Steel Grade 441 Physical Properties
Density (g/cm3) | Magnetic | Specific heat250C (J/kg.0C) | Thermal conductivity 1000C(W/m. 0C) | Thermal expansion rate 20~1000C(10-6/0C) |
| 7.60 | Have | 462 | 27.1 | 10.1 |
7. Use Status
1) Cold rolled annealing solution state:
2D, 2B, and other surface treatment states.