1.4878 || AISI 321H
Austenitic heat-resistant chromium-nickel steel
The 1.4878 is an austenitic heat-resistant chromium-nickel steel stabilized with titanium. It is chemically similar to 1.4541. The difference lies in the carbon content.
Heat-resistant Stainless Steel
General properties in processing:
- Good machinability
- Good weldability
Distinguishing properties:
- Scale resistant up to 850 °C
Corrosion resistance:
- In oxidizing media up to 850 °C
- In oxidizing and sulfur-containing media up to 750 °C
Applications:
- Apparatus and container construction
- Automotive industry
- Chemistry and petrochemistry
- Industrial furnace construction
- Pulp and paper industry
Chemical values – Reference analysis (weight proportion in %)
C | 0,04 – 0,10 |
Si | max 1,0 |
Mn | max 2,0 |
P | max 0,045 |
S | max 0,015 |
Cr | 17,0 – 19,0 |
Ni | 9,0 – 12 |
Ti | 5xC – 0,8 |
Mechanical values at room temperature
Hardness HB | ≤ 215 |
Yield strength Rp 0.2 | ≥ 190 N/mm2 |
Tensile strength Rm | 550 – 700 N/mm2 |
Elongation A5 | ≥ 40 % |
Creep strength
Creep strength is the mechanical initial stress that causes a material to break after a certain period of stress duration and at a constant temperature above the transition temperature under constant tensile force.
Temperature | 1 000 h | 10 000 h | 100 000 h |
---|---|---|---|
Temperature: 600 °C | 1 000 h : 200 N/mm2 | 10 000 h: 142 N/mm2 | 100 000 h: 65 N/mm2 |
Temperature: 700 °C | 1 000 h : 88 N/mm2 | 10 000 h: 48 N/mm2 | 100 000 h: 22 N/mm2 |
Temperature: 800 °C | 1 000 h : 30 N/mm2 | 10 000 h: 15 N/mm2 | 100 000 h: 10 N/mm2 |
Creep limit
Creep limit is the initial stress that leads to a specified plastic deformation under constant tensile stress at a predetermined temperature and duration of stress.
Temperature | 1 % Creep limit for 1,000 h | 10 000 h |
---|---|---|
Temperature: 600 °C | 1 % Creep limit for 1,000 h: 110 N/mm2 | 10 000 h: 85 N/mm2 |
Temperature: 700 °C | 1 % Creep limit for 1,000 h: 45 N/mm2 | 10 000 h: 30 N/mm2 |
Temperature: 800 °C | 1 % Creep limit for 1,000 h: 15 N/mm2 | 10 000 h: 10 N/mm2 |
Coefficient of thermal expansion
Coefficient of thermal expansion for heat-resistant alloys, which have a high coefficient of thermal expansion and low thermal conductivity, leading to temperature and stress differences in a component or assembly. The coefficient of thermal expansion is expressed by the proportional length change for each degree of temperature increase, usually as 10 –6 K –1.
Temperature | Coefficient of thermal expansion |
---|---|
Temperature: 200 °C | Coefficient of thermal expansion: 17,0 |
Temperature: 400 °C | Coefficient of thermal expansion: 18,0 |
Temperature: 600 °C | Coefficient of thermal expansion: 18,5 |
Temperature: 800 °C | Coefficient of thermal expansion: 19 |
Standards for pipes
- EN 10216-5
- EN 10297-2
- ASME SA312
The information provided on this page is non-binding. It serves only as orientation.
We cannot guarantee the results in processing and application of the products.
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Tables and rates
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Delivery Program
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