This data sheet applies to 321H / 1.4878 hot and cold rolled sheet, strip and bars, semi-finished products, rods and sections.
Application
For construction parts which should be resistant to scaling up to about 850°C and extensively inured to the effect of sulphurous gases. Inclination to carbonisation in reduced gases is very low.
Chemical Compositions
| Element | % Present (in product form) |
Carbon (C) | 0.10 |
Silicon (Si) | 1.00 |
Manganese (Mn) | 2.00 |
Phosphorous (P) | 0.045 |
Sulfur (S) | 0.015 |
Chromium (Cr) | 17.00 - 19.00 |
Nickel (Ni) | 9.00 - 12.00 |
Nitrogen (N) | 5xC ≤ 0.80 |
Iron (Fe) | Balance |
Mechanical properties (at room temperature in annealed condition)
| Product Form | |||
C, H, P | L | ||
Thickness a or diamter d (mm) | a ≤ 12 | d ≤ 25 | |
Hardness HB max. | 215 | ||
Proof Strength | Rp0.2 N/mm2 | 190 | |
Rp1.0 N/mm2 | 230 | ||
Tensile Strength | Rm N/mm2 | 500 - 720 | |
Elongation min. in % | Long Products | 40 | |
| Flat Products | 0.5 ≤ a/d < 3 | 40 | |
| 3 ≤ a/d | 40 | ||
Creep Properties (estimated average values about the long-term behaviour at elevated temperature*)
| 1% Elongation for | Rupture for | ||||
Temperature °C | 1,000 h N/mm2 | 10,000 h N/mm2 | 1,000 h N/mm2 | 10,000 h N/mm2 | 100,000 h N/mm2 |
600 | 110 | 85 | 200 | 142 | 65 |
700 | 45 | 30 | 88 | 48 | 22 |
800 | 15 | 10 | 30 | 15 | 10 |
