1.4828 || AISI 309
Heat-resistant stainless steel for thermal plants
1.4828 is a heat-resistant alloy commonly used in high-temperature furnaces, heat exchangers, and thermal plants. Due to its good mechanical properties at higher temperatures, it is often used for steam lines, flue gas ducts, industrial furnaces, drying equipment, and general thermal processes.
Heat-resistant Stainless Steel
General properties in processing:
- Moderately machinable (low cutting depths and speed)
- Good weldability
- Good forgeability
Distinguishing properties:
- Heat-resistant 800 °C – 1.000 °C
- Standard grade in furnace construction
- Good mechanical properties due to high tensile strength at higher temperatures
- Better scale resistance than 1.4878
Corrosion resistance:
- Low: against oxidizing or reducing sulfur-containing gases (up to 650 °C)
- Moderate: against carburizing or nitrogen-containing oxygen-poor gases
Applications:
- Automotive industry
- Chemistry and petrochemistry
- High-temperature apparatus construction
- Furnace construction
- Cement industry
Chemical values – Reference analysis (weight proportion in %)
| Value | Proportion |
|---|---|
| C | ≤ 0,20 |
| Si | 1,5 – 2,0 |
| Mn | ≤ 2,0 |
| P | ≤ 0,045 |
| S | ≤ 0,015 |
| Cr | 19,0 – 21,0 |
| Ni | 11,0 – 13,0 |
| N | ≤ 0,11 |
Mechanical values at room temperature
| Hardness HB | ≤ 223 |
| Yield strength Rp 0.2 | ≥ 230 N/mm2 |
| Tensile strength Rm | 550 – 780 N/mm2 |
| Elongation A5 | ≥ 30% |
Creep strength
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 : 190 N/mm2 | 10 000 h: 120 N/mm2 | 100 000 h: 65 N/mm2 |
| Temperature: 700 °C | 1 000 h : 75 N/mm2 | 10 000 h: 36 N/mm2 | 100 000 h: 16 N/mm2 |
| Temperature: 800 °C | 1 000 h : 35 N/mm2 | 10 000 h: 18 N/mm2 | 100 000 h: 7,5 N/mm2 |
| Temperature: 900 °C | 1 000 h : 15 N/mm2 | 10 000 h: 8,5 N/mm2 | 100 000 h: 3 N/mm2 |
Creep limit
The initial stress that leads to a certain plastic deformation under constant tensile stress at a predetermined temperature and exposure time.
| Temperature | 1 % Creep limit for 1,000 h | 10 000 h |
|---|---|---|
| Temperature: 600 °C | 1 % Creep limit for 1,000 h: 120 N/mm2 | 10 000 h: 80 N/mm2 |
| Temperature: 700 °C | 1 % Creep limit for 1,000 h: 50 N/mm2 | 10 000 h: 25 N/mm2 |
| Temperature: 800 °C | 1 % Creep limit for 1,000 h: 20 N/mm2 | 10 000 h: 10 N/mm2 |
| Temperature: 900 °C | 1 % Creep limit for 1,000 h: 8 N/mm2 | 10 000 h: 4 N/mm2 |
Coefficient of thermal expansion
Heat-resistant alloys have a high coefficient of thermal expansion and low thermal conductivity. These properties lead 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: 16,5 |
| Temperature: 400 °C | Coefficient of thermal expansion: 17,5 |
| Temperature: 600 °C | Coefficient of thermal expansion: 18,0 |
| Temperature: 800 °C | Coefficient of thermal expansion: 18,5 |
| Temperature: 1 000 °C | Coefficient of thermal expansion: 19,5 |
Standards for pipes
- EN 10217-7
- EN 10296-2
- SEW 470
- ASME SA 312
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.
Tables and rates
Delivery Program
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