1.4521, X2CrMoTi18-2, AISI 444 - stainless steel according to EN 10028-7.
Table of content:
| Standard | Steel Grade | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||||||
| C: | Si: | Mn: | P: | S: | Cr: | Mo: | Ti: | N: | |||||||
| EN | 1.4521 - X2CrMoTi18-2 | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,015 | 17,0-20,0 | 1,8-2,5 | 0,15-0,80 | <0,03 | |||||||
| ASTM | AISI 444 - UNS S44401 | ||||||||||||||
| <0,03 | <1,0 | <0,5 | <0,04 | <0,03 | 17,5-19,5 | 1,75-2,50 | - | <0,035 | |||||||
| EN | 1.4605 - X2CrAlTi18-2 | ||||||||||||||
| <0,03 | <1,0 | <1,0 | <0,04 | <0,015 | 17,0-18,0 | - | <0,8 | - | |||||||
| EN | 1.4523 - X2CrMoTiS18 | ||||||||||||||
| <0,03 | <1,0 | <0,5 | <0,04 | 0,15-0,35 | 17,5-19,0 | 2,0-2,5 | 0,3-0,8 | - | |||||||
| NF | Z3CAT18 | ||||||||||||||
| <0,03 | <1,0 | <1,0 | <0,04 | <0,015 | 17,0-18,0 | - | <0,8 | - | |||||||
| NF | Z3CDFT18-02 | ||||||||||||||
| <0,03 | <0,75 | <0,8 | <0,03 | <0,015 | 17,5-20,0 | 2,0-2,5 | - | <0,025 | |||||||
| NF | Z3CDT18-02 | ||||||||||||||
| <0,03 | <0,75 | <0,8 | <0,03 | <0,015 | 17,5-20,0 | 2,0-2,5 | - | <0,025 | |||||||
| DIN | 1.4321 - X2NiCr18 | ||||||||||||||
| <0,03 | 0,3-0,5 | 0,6-0,9 | <0,045 | <0,03 | 15,5-16,5 | - | - | - | |||||||
| JIS | SUS444 | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,03 | 17,0-20,0 | 1,75-2,50 | - | <0,025 | |||||||
| STAS | 2TiMoCr180 | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,03 | 17,0-20,0 | 1,8-2,5 | <0,8 | - | |||||||
| UNE | F3123 | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,03 | 17,5-19,5 | 1,75-2,50 | - | <0,035 | |||||||
| SS | 2326 | ||||||||||||||
| <0,025 | <1,0 | <0,5 | <0,04 | <0,025 | 17,0-19,0 | 2,0-2,5 | 0,2-0,8 | <0,025 | |||||||
| GB/T | 00Cr18Mo2 | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,03 | 17,5-19,5 | 1,75-2,50 | 0,2-0,8 | <0,035 | |||||||
| GB/T | 019Cr19Mo2NbTi | ||||||||||||||
| <0,025 | <1,0 | <1,0 | <0,04 | <0,03 | 17,5-19,5 | 1,75-2,50 | 0,2-0,8 | <0,035 | |||||||
1.4521, X2CrMoTi18-2, AISI 444 – description
1.4521 steel is used for parts produced by cold forming, such as bolts, nuts, hot water tanks, chimney ducts and heat exchangers.
The steel is suitable for underwater applications, provided that the concentration of Cl-chlorides does not exceed 200 ppm. For hot water or more conservative design requirements, the limit is lowered.
The steel belongs to welding group 7.1 according to ISO. Weldability good for small cross-sections, limited for larger ones. Prior to welding, heating is recommended.
Physical and mechanical properties
1.4521 physical properties and general mechanical properties:
- In ambient temperature:
- Density: 7.73 g/cm3
- Specific heat capacity: 0.43 kJ/(kg*K)
- Electrical resistivity: 0.8 Ω*cm
- Thermal conductivity: 23 W/(m*K)
- Linear expansion coefficient: 10.4 * 10-6/K
- Young's modulus E: 220 GPa
- Hardness HB: < 185
- At 100°C:
- Linear expansion coefficient: 10.4 * 10-6/K
- Young's modulus E: 215 GPa
- At 200°C:
- Linear expansion coefficient: 10.8 * 10-6/K
- Young's modulus E: 210 GPa
- At 300°C:
- Linear expansion coefficient: 11.2 * 10-6/K
- Young's modulus E: 205 GPa
- At 400°C:
- Linear expansion coefficient: 11.6 * 10-6/K
- Young's modulus E: 195 GPa
- At 500°C:
- Linear expansion coefficient: 11.9 * 10-6/K
1.4521 mechanical properties:
- Annealed (+A):
- Cold rolled strip:
- Longitudial test pieces:
- Yield strength Re: > 300 MPa
- Tensile strength Rm: 420-640 MPa
- Elongation A: > 20 %
- Transverse test pieces:
- Yield strength Re: > 320 MPa
- Tensile strength Rm: 420-640 MPa
- Elongation A: > 20 %
- Longitudial test pieces:
- Hot rolled strip:
- Longitudial test pieces:
- Yield strength Re: > 280 MPa
- Tensile strength Rm: 400-600 MPa
- Elongation A: > 20 %
- Transverse test pieces:
- Yield strength Re: > 300 MPa
- Tensile strength Rm: 400-600 MPa
- Elongation A: > 20 %
- Longitudial test pieces:
- Hot rolled plate:
- Longitudial test pieces:
- Yield strength Re: > 280 MPa
- Tensile strength Rm: 420-620 MPa
- Elongation A: > 20 %
- Transverse test pieces:
- Yield strength Re: > 300 MPa
- Tensile strength Rm: 420-640 MPa
- Elongation A: > 20 %
- Longitudial test pieces:
- Generally:
- At 50°C:
- Yield strength Re: > 294 MPa
- At 100°C:
- Yield strength Re: > 250 MPa
- At 150°C:
- Yield strength Re: > 240 MPa
- At 200°C:
- Yield strength Re: > 230 MPa
- At 250°C:
- Yield strength Re: > 220 MPa
- At 300°C:
- Yield strength Re: > 210 MPa
- At 350°C:
- Yield strength Re: > 205 MPa
- At 400°C:
- Yield strength Re: > 200 MPa
- At 50°C:
- Cold rolled strip:
Drawability of 1.4521 steel (tested 0.8 mm thick sheet):
- Erichsen Value IE: 8.6 mm
Pitting corrosion resistance:
- Pitting Resistance Equivalent Number. PREN: 25
- Critical Pitting Temperature. CPT: < 10 °C
Heat treatment and working
Recommended working and heat treatment parameters for 1.4521 alloy:
- Forging: 1050-750 °C; Water, air or gas cooling.
- Rolling: 1050-750 °C; Water, air or gas cooling.
- Annealing: 750-900 °C; Air or gas cooling. Furnance cooling in special cases.
We deliver this steel alloy as:
Replacements, equivalents and other designations:
1.4521, 444, 00Cr18Mo2, 019Cr19Mo2NbTi, 1.4523, 1.46055, X2CrAlTi18-2, X2CrMoTi18-2, X2CrMoTiS18-2, Z3CAT, Z3CDFT, Z3DCT 18-02,1.4321, 1.4741, X2NiCr1816, Fm20B, Fm20C, SUS444, 2TiMoCr180, F-3123, 2326, S44400, S44401