254 SMO®, X1CrNiMoCuN20-18-7, 1.4547 high-alloyed austenitic steels resistant to intergranular corrosion according to PN-EN 10088-1.
| Standard | Steel Grade | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition (%) | ||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Mo: | Ni: | Cu: | N: | |
| PN-EN | X1CrNiMoCuN20-18-7 - 1.4547 - 4547 | |||||||||
| <0.02 | <1.00 | <0.70 | <0.03 | <0.01 | 19.50 - 20.50 | 6.00 - 7.00 | 17.50 - 18.50 | 0.50 - 1.00 | 0.18 - 0.25 | |
| UNS | S31254 | |||||||||
| <0.02 | <1.00 | <0.80 | <0.03 | <0.01 | 19.50 - 20.50 | 6.00 - 6.50 | 17.50 - 18.50 | 0.50 - 1.00 | 0.18 - 0.25 | |
| GB/T | 00Cr20Ni18Mo6CuN | |||||||||
| <0.02 | <1.00 | <0.80 | <0.03 | <0.01 | 19.50 - 20.50 | 8.00 - 8.50 | 17.50 - 18.50 | 0.50 - 1.00 | 0.18 - 0.22 | |
| AFNOR | Z2CNDU20-18-7Az - Z 2 CNDU 20-18-7 Az - DMV 420 - DMV 4335 - DMV 954 | |||||||||
| <0.02 | <1.00 | <0.70 | <0.03 | <0.01 | 19.50 - 20.50 | 6.00 - 7.00 | 17.50 - 18.50 | 0.50 - 1.00 | 0.18 - 0.25 | |
| AFNOR | Z1CNDU20.18.06AZ - Z 1 CNDU 20.18.06Az | |||||||||
| <0.02 | <1.00 | <0.03 | - | <0.01 | 20.00 | 6.10 | 18.00 | 0.70 | 0.20 | |
| SANDVIK | 254SMO® - 254 SMO ® - SMO 254 - SMO254 | |||||||||
| <0.02 | <1.00 | <0.03 | - | <0.01 | 20.00 | 6.10 | 18.00 | 0.70 | 0.20 | |
| EN | GX2CrNiMoCuN20-18-6 - GX 2 CrNiMoCuN 20-18-6 - 1.4557 | |||||||||
| <0.025 | <1.00 | <0.03 | <0.03 | <0.01 | 19.50 - 20.50 | 6.00 - 7.00 | 17.50 - 19.50 | 0.50 - 1.00 | 0.18 - 0.24 | |
254SMO, 1.4547, X1CrNiMoCuN20-18-7 steel - application
Stainless steel used in cryogenic, paper, chemical, petrochemical and refining industries, in power plants for heat exchangers, radiators, in aviation construction as aviation steel, screws, valves, heat exchangers, coolers, special tanks, pumps and pipelines.
Steel resistant to intergranular corrosion in the sensitized and in the delivery conditions. Non-magnetic steel.
Mechanical properties - X1CrNiMoCuN20-18-7 / 1.4547
| Mechanical and physical properties, thermal treatment | |
|---|---|
| Tensile strength Rm | 650 - 850 MPa |
| Yield point Rp0.2 | ≥ 300 MPa |
| Hardness | ≤ 260 HB |
| ElongationA | ≥ 35% |
| Modulus of elasticity, E | 195 GPa |
| Thermal conductivity λ | 14 W ⋅ m⁻¹ K⁻¹ |
| Heat capacity cp20℃ | 500 J ⋅ kg⁻¹ K⁻¹ |
| Densityρ | 8.10 kg/dm³ |
| Annealing | 1050 - 1150℃ |
Properties of X1CrNiMoCuN20-18-7, 1.4547 steel at various temperatures
| Properties of X1CrNiMoCuN20-18-7 at elevated temperatures | |||||
|---|---|---|---|---|---|
| temperatures | 100℃ | 200℃ | 300℃ | 400℃ | 500℃ |
| Modulus of elasticity E | 190 | 182 | 174 | 166 | 158 |
| Linear Expansion Factor α20℃ | 16.5 ⋅ 10⁻⁶ K⁻¹ | 17.0 ⋅ 10⁻⁶ K⁻¹ | 17.5 ⋅ 10⁻⁶ K⁻¹ | 18.0 ⋅ 10⁻⁶ K⁻¹ | 18.0 ⋅ 10⁻⁶ K⁻¹ |
| Yield point Rp0.2 | ≥ 230 | ≥ 190 | ≥ 170 | ≥ 160 | ≥ 148 |
In the X1CrNiMoCuN20-18-7 grade the company supplies:
- Round bars 1.4547, 254SMO, X1CrNiMoCuN20-18-7
- Forgings, forged rings and bars 1.4547, 254SMO, X1CrNiMoCuN20-18-7
- Seamless and welded tubes 1.4547, 254SMO
- Cold-rolled and hot-rolled sheets, plates coils 1.4547, 254SMO, X1CrNiMoCuN20-18-7
List of equivalents and other determinations of X1CrNiMoCuN20-18-7 steel:
X1CrNiMoCuN20-18-7, 1.4547, 4547, S31254, 00Cr20Ni18Mo6CuN, Z2CNDU20-18-7Az, Z 2 CNDU 20-18-7 Az, DMV 420, DMV 4335, DMV 954, Z1CNDU20.18.06AZ, Z 1 CNDU 20.18.06Az, 254SMO®, 254 SMO ®, GX2CrNiMoCuN20-18-6, GX 2 CrNiMoCuN 20-18-6, 1.4557, SMO254, SMO 254