1.4878 Stainless Steel Chemical Composition
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What is 1.4878 material?
1.4878 is the European Standard (EN) designation for a titanium-stabilized high-carbon austenitic stainless steel, also known as AISI 321H or UNS S32109. It is a heat-resistant steel with excellent high-temperature strength and creep resistance, designed for applications requiring prolonged exposure to high temperatures (e.g., 800-1500°F or 427-816°C).
What is 1.4878 SS equivalent to?
The material number 1.4878 (also known as X8CrNiTi18-10) is a titanium-stabilized, heat-resistant stainless steel, most commonly equivalent to AISI 321H or simply 321/321H, offering good corrosion resistance and superior performance in high-temperature applications (up to ~850°C) compared to standard 304 grades.
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USA - |
Japan JIS |
France AFNOR |
England BS |
Italy UNI |
Sweden SS |
GOST | Inter ISO |
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What material is X8CrNiTi18-10 equivalent to?
X8CrNiTi18-10 is equivalent to the European (EN) grade 1.4878, the American (AISI) grade 321H, and the Japanese (JIS) grade SUS321. This austenitic stainless steel contains titanium, which improves high-temperature strength and creep resistance, making it suitable for applications up to 850°C (1560°F).
What is the composition of 1.4878 SS?
1.4878 SS (AISI 321H) composition is primarily Iron (balance), with key elements including Chromium (17-19%), Nickel (9-12%), Titanium (stabilizer), Manganese (max 2%), Silicon (max 1%), Carbon (max 0.10%), Phosphorus (max 0.045%), and Sulfur (max 0.03%), offering excellent high-temperature strength and corrosion resistance.
| 1.4878 321H steel chemical element | % present |
|---|---|
| Carbon (C) [Max] | 0.010% |
| Silicon (Si) [Max] | 1.00% |
| Manganese (Mn) | 2.00% |
| Phosphorus (P) [Max] | 0.045% |
| Sulphur (S) [Max] | 0.015% |
| Chromium (Cr) [Max | 17.0 to 19.0% |
| Nickel (Ni) [Max] | 9.00 to 12.00% |
| Titanium (Ti) [Max] | 5Xc to 0.80% |
1.4878 Stainless Sheet Mechanical Properties
| SS | Elongation in % (50mm) | Yield Strength 0.2% | Tensile Strength | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 321H | 40% | 205 MPa | 515 MPa | 95 HR B | 217 HB |
SS 321H stainless steel Creep Properties
1% Elongation1) for |
Rupture2) for | ||||
|---|---|---|---|---|---|
| 1,000 h N/mm2 | Temperature °C | 100,000 h N/mm2 | 1,000 h N/mm2 | 10,000 h N/mm2 | 10,000 h N/mm2 |
| 45 | 700 | 22 | 88 | 30 | 48 |
| 110 | 600 | 65 | 200 | 85 | 142 |
| 15 | 800 | 10 | 30 | 10 | 15 |
Are 1.4878 and 1.4541 stainless steel magnetic?
No, 1.4878 (AISI 321H) and 1.4541 (AISI 321) stainless steels are generally non-magnetic in their annealed (heat-treated) state because they are austenitic steels, though they can become slightly magnetic or weakly magnetic after cold working, welding, or quenching, due to changes in their crystal structure.
Differences between 1.4878 and 1.4541 stainless steel
The main difference is that 1.4878 (AISI 321H) has a higher carbon content than 1.4541 (AISI 321), resulting in higher creep strength and better high-temperature performance, making it more suitable for high-temperature structural applications. Both are titanium-stabilized austenitic stainless steels with similar corrosion resistance, but 1.4878 is specifically designed for long-term use at temperatures above 500°C.
Differences between 1.4878 and 1.4961 stainless steel
The main difference is that 1.4878 (321H) is a higher-carbon, higher-strength version of 321 (1.4541), while 1.4961 (347H) is an austenite stainless steel stabilized with niobium (columbium), designed for higher-temperature service. Therefore, 1.4878 is optimized for improved creep strength and thermal stability, whereas 1.4961 uses niobium to provide superior resistance to intergranular corrosion, especially after welding at high temperatures.
If you have a project need for 321 stainless steel plate, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We offer a variety of practical product forms, including hot-rolled and cold-rolled. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service. Email: info@gneestainless.com
