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Quality 1.4903
General Product Description
Material number 1.4903
Short name according to EN 1.4903
AISI / UNS / Alloy UNS K90901
Applicable standards EN 10302, VdTÜV W.BL511/3, ASTM A182, ASME SA 182, TLV 9242 02
Treatment quenched and tempered
Variations
| Quality | Treatment | Shape | Dimension (mm) |
|---|---|---|---|
| 1.4903 | quenched and tempered |  Round | 20 - 250 |
Description
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.
Chemical composition (in %)
| C | Cr | Ni | Mo | Al | Mn | Si | P | S | V | N | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | 0,08 | 8,00 | - | 0,85 | - | 0,30 | - | - | - | 0,18 | 0,03 |
| Max | 0,12 | 9,50 | 0,40 | 1,05 | 0,04 | 0,60 | 0,50 | 0,025 | 0,015 | 0,25 | 0,07 |
| Element | Min | Max |
|---|---|---|
| C | 0,08 | 0,12 |
| Cr | 8,00 | 9,50 |
| Ni | - | 0,40 |
| Mo | 0,85 | 1,05 |
| Al | - | 0,04 |
| Mn | 0,30 | 0,60 |
| Si | - | 0,50 |
| P | - | 0,025 |
| S | - | 0,015 |
| V | 0,18 | 0,25 |
| N | 0,03 | 0,07 |
Mechanical properties (quenched and tempered)
Tensile strength Rm 620-850 N/mm2
0.2% proof stress Rp0.2 400–650 N/mm2
Elongation at break A5 ≥ 12 %
Notched impact energy (ISO-V) ≥ 35 J
Hardness 220–280 HB/HRC
Magnetizability Yes
Typical areas of application
power plant construction
Boiler Fittings and Accessories
power generation
Piping Systems
Mechanical engineering
General properties (quenched and tempered)
Corrosion Resistance
Weldability
Forgeability
Tensionability
Note
All information in this data sheet has been compiled to the best of our knowledge and belief. It is for information purposes only and does not constitute a assured property or guarantee. For the suitability of the material in specific applications, we recommend carrying out appropriate inspections and tests. Any liability for damage or errors is excluded.