1.4841 vs 1.4845 stainless steel: High temperature performance
Looking to choose between 1.4841 and 1.4845 stainless steel? These two high-temperature austenitic stainless steels are often compared due to their similar alloy families, but their chemical composition and application performance can significantly impact your decision.
What is 1.4841 Stainless Steel?
1.4841 stainless steel, also known as X15CrNiSi25-21 (EN), is a heat-resistant austenitic stainless steel with high chromium and nickel content. It offers excellent oxidation resistance at elevated temperatures up to 1100–1150°C, making it ideal for furnace parts, heat exchangers, and burner components.
What is 1.4845 Stainless Steel?
1.4845 stainless steel, designated as X8CrNi25-21, is the EN equivalent of AISI 310S. It features lower carbon content (≤0.08%), improving weldability and resistance to intergranular corrosion, while retaining excellent performance at high temperatures.
1.4841 vs 1.4845 stainless steel:Equivalent Grades
| Standard | 1.4841 | 1.4845 |
|---|---|---|
| EN Name | X15CrNiSi25-21 | X8CrNi25-21 |
| UNS | S31400 | S31008 |
| AISI/ASTM | 314 | 310S |
| DIN (Old) | – | – |
| JIS | SUH 310 | SUS 310S |
| ISO | 25-21 | 25-21 |
What is the difference between 1.4841 and 1.4845?
1.4841 vs 1.4845: Chemical Composition Comparison
| Property | 1.4841 (X15CrNiSi25-21) | 1.4845 (X8CrNi25-21) |
|---|---|---|
| Carbon (C) | ≤ 0.20 | ≤ 0.08 |
| Silicon (Si) | 1.5–2.5 | ≤ 1.5 |
| Nickel (Ni) | 19.0–22.0 | 19.0–22.0 |
| Chromium (Cr) | 24.0–26.0 | 24.0–26.0 |
| Weldability | Lower (due to higher C) | Better (low carbon) |
| Sensitization risk | Higher | Lower |
If your application involves welding or requires resistance to intergranular corrosion, 1.4845 is the safer and more reliable option. For maximum high-temp strength and economy in non-welded components, 1.4841 may be acceptable.
1.4841 vs 1.4845 stainless steel:Mechanical Properties (at Room Temperature, Annealed)
| Property | 1.4841 | 1.4845 |
|---|---|---|
| Tensile Strength (Rm, MPa) | 550–750 | 500–750 |
| Yield Strength (Rp0.2, MPa) | ≥ 210 | ≥ 205 |
| Elongation A5 (%) | ≥ 30 | ≥ 40 |
| Hardness (HB) | ≤ 220 | ≤ 192 |
| Impact Toughness (J) | Not typically specified | > 60 (typical, room temp) |
1.4841 vs 1.4845 stainless steel:Physical Properties
| Property | 1.4841 | 1.4845 |
|---|---|---|
| Density (g/cm³) | 7.9 | 7.9 |
| Thermal Conductivity (W/m·K) at 20°C | ~14.2 | ~14.2 |
| Specific Heat (J/kg·K) | ~500 | ~500 |
| Electrical Resistivity (μΩ·cm) | ~100 | ~95 |
| Modulus of Elasticity (GPa) | ~200 | ~200 |
| Magnetic Properties | Non-magnetic | Non-magnetic |
1.4841 vs 1.4845 stainless steel:Heat Treatment & Working Conditions
| Feature | 1.4841 | 1.4845 |
|---|---|---|
| Solution Annealing Temp | 1050–1150°C | 1040–1100°C |
| Cooling Method After Annealing | Rapid air or water quenching | Water or air cooling |
| Max Continuous Service Temp | ~1100°C | ~1050–1100°C |
| Oxidation Resistance | Excellent | Excellent |
| Weldability | Limited (high C = sensitization risk) | Good (low C = less risk) |
| Formability | Moderate | Good |
1.4845 stainless steel weldability
1.4845 stainless steel offers good weldability due to its low carbon content (≤0.08%), which significantly reduces the risk of carbide precipitation and intergranular corrosion during welding.
It can be welded using common methods such as TIG, MIG, and MMA without the need for preheating. Post-weld heat treatment is generally not required, although it may be considered in critical high-temperature applications to restore full corrosion resistance. For best results, using filler metals like ER310 or matching alloy types is recommended.
Looking for Reliable 1.4841 or 1.4845 Stainless Steel Supplier?
At Gnee Steel, we stock both 1.4841 and 1.4845 stainless steel sheets, pipes, and tubes in multiple dimensions with EN 10216, ASTM A312, and ASTM A240 certifications. Our materials undergo 100% PMI testing, ultrasonic inspection, and surface quality control, ensuring compliance and performance.
Fully Compliant:All products meet South American and European export standards and are certified by ASTM, EN and other relevant certifications.
Efficient delivery cycle: 20-25 days for production + 30-35 days for shipping (e.g., an order placed now will arrive in early September).
Logistics support:We provide cubic meter calculations, freight options, and secure packaging (small/large bales, seaworthy boxes).
📩 Contact us today for a free quote or datasheet. Let our team help you choose the best material for your high-temperature application.
