254 SMO®, X1CrNiMoCuN20-18-7, 1.4547 high-alloyed austenitic steels resistant to intergranular corrosion according to PN-EN 10088-1.

 

StandardSteel Grade
Chemical Composition (%)
C:Mn:Si:P:S:Cr:Mo:Ni:Cu:N:
PN-ENX1CrNiMoCuN20-18-7 - 1.4547 - 4547
<0.02<1.00<0.70<0.03<0.0119.50 - 20.506.00 - 7.0017.50 - 18.500.50 - 1.000.18 - 0.25
UNSS31254
<0.02<1.00<0.80<0.03<0.0119.50 - 20.506.00 - 6.5017.50 - 18.500.50 - 1.000.18 - 0.25
GB/T00Cr20Ni18Mo6CuN
<0.02<1.00<0.80<0.03<0.0119.50 - 20.508.00 - 8.5017.50 - 18.500.50 - 1.000.18 - 0.22
AFNORZ2CNDU20-18-7Az - Z 2 CNDU 20-18-7 Az - DMV 420 - DMV 4335 - DMV 954
<0.02<1.00<0.70<0.03<0.0119.50 - 20.506.00 - 7.0017.50 - 18.500.50 - 1.000.18 - 0.25
AFNORZ1CNDU20.18.06AZ - Z 1 CNDU 20.18.06Az
<0.02<1.00<0.03-<0.0120.006.1018.000.700.20
SANDVIK254SMO® - 254 SMO ® - SMO 254 - SMO254
<0.02<1.00<0.03-<0.0120.006.1018.000.700.20
ENGX2CrNiMoCuN20-18-6 - GX 2 CrNiMoCuN 20-18-6 - 1.4557
<0.025<1.00<0.03<0.03<0.0119.50 - 20.506.00 - 7.0017.50 - 19.500.50 - 1.000.18 - 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 Rm650 - 850 MPa
Yield point Rp0.2≥ 300 MPa
Hardness≤ 260 HB
ElongationA≥ 35%
Modulus of elasticity, E195 GPa
Thermal conductivity λ14  W ⋅ m⁻¹ K⁻¹
Heat capacity cp20℃500 J ⋅ ​kg⁻¹ K⁻¹
Densityρ8.10 kg/dm³
Annealing1050 - 1150℃

 


Properties of X1CrNiMoCuN20-18-7, 1.4547 steel at various temperatures

Properties of X1CrNiMoCuN20-18-7 at elevated temperatures
temperatures100200300400500
Modulus of elasticity E190182174166158
Linear Expansion Factor α20℃16.5 ⋅ 10⁻⁶ K⁻¹17.0 ⋅ 10⁻⁶ K⁻¹17.5 ⋅ 10⁻⁶ K⁻¹18.0 ⋅ 10⁻⁶ K⁻¹18.0 ⋅ 10⁻⁶ K⁻¹
Yield point Rp0.2≥ 230≥ 190≥ 170≥ 160≥ 148

 


In the X1CrNiMoCuN20-18-7 grade the company supplies:

 


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


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