1.4841 Stainless Steel – High Temperature Alloy for Demanding Industrial Applications
The 1.4841 material, also known as AISI 314 or X15CrNiSi25-21, is an austenitic, heat-resistant chromium-nickel stainless steel. Its excellent oxidation resistance at elevated temperatures makes it well-suited for applications in heat treatment equipment, furnaces, and process industries.
Heat-resistant Stainless Steel
1.4841 || AISI 314
Temperature Resistance of 1.4841 Material
1.4841 stainless steel performs reliably within a temperature range of 900 °C to 1120 °C. In air, it remains scale-resistant up to 1150 °C, making it suitable for continuous high-temperature exposure in industrial environments.
Corrosion Resistance of 1.4841 Stainless Steel
The material offers very good resistance in oxidizing atmospheres. In reducing, sulfur-containing gases, however, resistance is limited and recommended only up to 650 °C. Under carburizing or low-oxygen conditions above 900 °C, the material’s durability is moderate and may require consideration of alternatives.
Magnetic Properties of 1.4841 Material
Due to its austenitic microstructure, 1.4841 stainless steel is non-magnetic. Even after cold deformation, magnetic permeability remains low.
- Density: 7.9 kg/dm³
- Electrical resistivity: 0.90 Ω·mm²/m
- Thermal conductivity: 15 W/m·K
- Specific heat capacity: 500 J/kg·K
Typical Applications of 1.4841 Stainless Steel
1.4841 material is used in various high temperature applications, including:- Heat resistant equipment in industrial plants
- Components in the chemical and petrochemical industry
- Chains, furnace parts, and kiln equipment
- Automotive and construction industry
- Screens, grates, and thermally stressed structural elements
- Hot forming: 1150 – 800 °C, followed by air cooling
- Solution annealing: 1050 – 1150 °C, quenching in air or water
- Forging: 1175 – 1000 °C, followed by rapid cooling
- Can 1.4841 be welded?
- Yes, the material is weldable using all standard welding methods. Preheating or post-weld heat treatment is generally not required. However, due to its tendency toward hot cracking, welding energy input should be kept as low as possible.
- Machinability of 1.4841 Stainless Steel
- Similar to 1.4828, 1.4841 tends to form carbides, which can accelerate tool wear. High-performance cutting tools and intensive cooling are essential. The material’s work-hardening behavior requires reduced cutting speeds during machining.
Chemical Composition of 1.4841 (AISI 314)
This alloy is based on a stable chromium-nickel structure with increased silicon content:
| Chromium (Cr): | 24.0 – 26.0 % |
| Nickel (Ni): | 19.0 – 22.0 % |
| Silicon (Si): | 1.5 – 2.5 % |
| Carbon (C): | max. 0.20 % |
| Manganese (Mn): | max. 2.00 % |
| Phosphorus (P): | max. 0.045 % |
| Sulfur (S): | max. 0.015 % |
| Nitrogen (N): | max. 0.11 % |
Mechanical Properties at Room Temperature
| Hardness HB | ≤ 223 |
| Yield strength Rp 0.2 | ≥ 230 N/mm2 |
| Tensile strength Rm | 550 – 750 N/mm2 |
| Elongation A5 | ≥ 30 % |
| Modulus of elasticity: | approx. 196 kN/mm² |
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: 170 N/mm2 | 10 000 h: 130 N/mm2 | 100 000 h: 80 N/mm2 |
| Temperature: 700 ° C | 1 000 h: 90 N/mm2 | 10 000 h: 40 N/mm2 | 100 000 h: 18 N/mm2 |
| Temperature: 800 °C | 1 000 h: 40 N/mm2 | 10 000 h: 20 N/mm2 | 100 000 h: 7 N/mm2 |
| Temperature: 900 °C | 1 000 h: 20 N/mm2 | 10 000 h: 10 N/mm2 | 100 000 h: 3 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: 105 N/mm2 | 10 000 h: 95 N/mm2 |
| Temperature: 700 °C | 1 % Creep limit for 1,000 h: 50 N/mm2 | 10 000 h: 35 N/mm2 |
| Temperature: 800 °C | 1 % Creep limit for 1,000 h: 23 N/mm2 | 10 000 h: 10 N/mm2 |
| Temperature: 900 °C | 1 % Creep limit for 1,000 h: 10 N/mm2 | 10 000 h: 4 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: 15,5 |
| Temperature: 400 °C | Coefficient of thermal expansion: 17,0 |
| Temperature: 600 °C | Coefficient of thermal expansion: 17,5 |
| Temperature: 800 °C | Coefficient of thermal expansion: 18,0 |
| Temperature: 1 000 °C | Coefficient of thermal expansion: 19,0 |
Standards for seamless pipes
- EN 10216-5
- 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
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