1.4335, X1CrNi25-21, S31002 - stainless steel acc. to EN 10088-1.
Table of content:
| Standard | Grade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical composition % | |||||||||||||||
| C: | Si: | Mn: | P: | S: | Cr: | Mo: | N: | Ni: | |||||||
| EN | 1.4335 - X1CrNi25-21 | ||||||||||||||
| <0.02 | <0.25 | <2.0 | <0.025 | <0.01 | 24.0 - 26.0 | <0.2 | <0.11 | 20.0 - 22.0 | |||||||
| AFNOR | Z1CN25-20 | ||||||||||||||
| <0.015 | <0.4 | <2.0 | <0.025 | <0.01 | 24.0 - 26.0 | <0.5 | - | 19.0 - 22.0 | |||||||
| BS | 310S94 | ||||||||||||||
| 0.08 - 0.15 | 0.25 - 0.65 | 1.0 - 2.5 | <0.03 | <0.03 | 25.0 - 28.0 | <0.5 | - | 20.0 - 22.5 | |||||||
| SANDVIK | 2RE10R | ||||||||||||||
| <0.015 | <0.15 | <1.8 | <0.02 | <0.005 | 24.5 | 0.1 | - | 20.5 | |||||||
| ASTM | AISI 310L - UNS S31002 | ||||||||||||||
| <0.02 | <0.15 | <2.0 | <0.02 | <0.015 | 24.0 - 26.0 | <0.1 | <0.1 | 19.0 - 22.0 | |||||||
1.4335, X1CrNi25-21, S31002 – description
The steel is widely used in chemical and nuclear industries, especially when boiling nitric acid concentrated up to 70% is involved. Some applications are absorption towers, heat exchangers, coolers, tanks, pumps and pipelines in nitric acid or ammonium nitrate producing plants. While being highly resistant to halides and many other concentrated acids, resistance to nitric acid remains its key feature. Please note that it should not be used in contact with concentrated nitric acid containing CrVI.
The alloy has only a small amount of coal and silicon while having a very high chromium and nickel content. This results in high corrosion resistance and good mechanical properties in a wide range of temperature - from cryogenic temperature up to 400°C.
The steel is soft and ductile, as are all austenitic steels. Cold forming does nor damage the corrosion resistance nor any heat treatment is required afterwards.
Physical and mechanical properties
1.4335 physical properties:
- In ambient temperature:
- Density: 7.9 g/cm3
- Specific heat capacity: 0.45 kJ/(kg*K)
- Thermal conductivity: 14 W/(m*K)
- Young's modulus E: 195 GPa
- Electrical resistivity: 0.85 µΩ*m
- Linear expansion coefficient: 15.8-17.3 (10-6/K)
- At 100°C:
- Linear expansion coefficient: 15.8 (10-6/K)
- Young's modulus E: 190 GPa
- At 200°C:
- Linear expansion coefficient: 16.1 (10-6/K)
- Young's modulus E: 182 GPa
- At 300°C:
- Linear expansion coefficient: 16.5 (10-6/K)
- Young's modulus E: 174 GPa
- At 400°C:
- Linear expansion coefficient: 16.9 (10-6/K)
- Young's modulus E: 166 GPa
- At 500°C:
- Linear expansion coefficient: 17.3 (10-6/K)
- Young's modulus E: 158 GPa
1.4335 mechanical properties:
- Hot rolled and solution annealed (+AT):
- Longitudial test pieces:
- Yield strength Re: > 180 MPa
- Tensile strength Rm: 470-670 MPa
- Elongation A: > 45 %
- Impact energy KV. 20°С: > 100 J
- Transverse test pieces:
- Yield strength Re: > 180 MPa
- Tensile strength Rm: 470-670 MPa
- Elongation A: > 40 %
- Impact energy KV. 20°С: > 60 J
- Impact energy KV. -196°С: > 60 J
- Longitudial test pieces:
- High temperature test:
- At 50°C:
- Yield strength Re: > 170 MPa
- At 100°C:
- Yield strength Re: > 150 MPa
- At 150°C:
- Yield strength Re: > 140 MPa
- At 200°C:
- Yield strength Re: > 130 MPa
- At 250°C:
- Yield strength Re: > 120 MPa
- At 300°C:
- Yield strength Re: > 115 MPa
- At 350°C:
- Yield strength Re: > 110 MPa
- At 400°C:
- Yield strength Re: > 105 MPa
- At 50°C:
Heat treatment and working
Recommended working and heat treatment parameters for 1.4335 alloy:
- Forging: 1150-800 °C
- Rolling: 1150-800 °C
- Solutioning: 1100-1150 °C
We deliver this steel alloy as:
- Bars
- Sheets
- Tubes and pipes
- Forgings
Replacements, equivalents and other designations:
1.4335, UR65, URANUS 65, Z1CN25-20, 310S94, 2RE10, 2RE10WT, 310L NAG, S31002, alloy 28, X1CrNi25-21,