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High heat-resistant materials
Quality 1.4903
Grade
1.4903
AISI/UNS + Alloy
UNS K90901
Material Specifications
EN 10302, VdTÜV W.BL511/3, ASTM A182, ASME SA 182, TLV 9242 02
Treatment
quenched and tempered
Mechanical Specifications
620 - 850 N/mm²
Shape
Round
20 mm - 250 mm
Chemical Analysis
| C: | 0,08 - 0,12 % |
| Cr: | 8,0 - 9,5 % |
| Mn: | 0,3 - 0,6 % |
| Mo: | 0,85 - 1,05 % |
| Ni: | max. 0,4 % |
| P: | max. 0,025 % |
| S: | max. 0,015 % |
| Si: | max. 0,5 % |
| V: | 0,18 - 0,25 % |
| N: | 0,03 - 0,07 % |
| Al: | max. 0,04 % |
Application
The material 1.4903 is a martensitic high-temperature steel. This grade is characterized by good mechanical behavior (creep yield strength and creep rupture strength) under long-term conditions at temperatures ≥ 500°C. Applications: power plant construction, mechanical engineering, power generation, fittings and accessories in boiler construction, piping.