SEW 555 Grade X21CrMoV12-1 quenched and tempered (+QT)

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Description

The high temperature alloy steel X21CrMoV12-1 is used for larger preshaped components in the quenched and tempered condition in turbine and generator installations, in particular as shafts and discs. The steel is weldable if the relevant measures required are observed.

Related Standards

SEW 555

Equivalent Materials

This material data has been provided by WIAM.

"Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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Properties

General

Property	Temperature	Value
Density	20.0 °C	7.7 - 7.76 g/cm³ Show Material materials with Density of 7.7 - 7.76 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	217.68 - 218 GPa Show Material materials with Elastic modulus of 217.68 - 218 GPa
	100.0 °C	213 GPa Show Material materials with Elastic modulus of 213 GPa
	200.0 °C	206 GPa Show Material materials with Elastic modulus of 206 GPa
	300.0 °C	198 GPa Show Material materials with Elastic modulus of 198 GPa
	400.0 °C	189 - 190 GPa Show Material materials with Elastic modulus of 189 - 190 GPa
	500.0 °C	179 - 180 GPa Show Material materials with Elastic modulus of 179 - 180 GPa
	600.0 °C	166 - 167 GPa Show Material materials with Elastic modulus of 166 - 167 GPa

Elongation, transverse	20.0 °C	11 % Show Material materials with Elongation, transverse of 11 %
Poisson's ratio	20.0 °C	0.28 [-] Show Material materials with Poisson's ratio of 0.28 [-]
Reduction of area, transverse	20.0 °C	40 % Show Material materials with Reduction of area, transverse of 40 %
Shear modulus	20.0 °C	84.95 GPa Show Material materials with Shear modulus of 84.95 GPa
Tensile strength, transverse	20.0 °C	750 - 900 MPa Show Material materials with Tensile strength, transverse of 750 - 900 MPa
Yield strength Rp0.2	100.0 °C	575 MPa Show Material materials with Yield strength Rp0.2 of 575 MPa
	200.0 °C	530 MPa Show Material materials with Yield strength Rp0.2 of 530 MPa
	250.0 °C	505 MPa Show Material materials with Yield strength Rp0.2 of 505 MPa
	300.0 °C	480 MPa Show Material materials with Yield strength Rp0.2 of 480 MPa
	350.0 °C	450 MPa Show Material materials with Yield strength Rp0.2 of 450 MPa
	400.0 °C	425 MPa Show Material materials with Yield strength Rp0.2 of 425 MPa
	450.0 °C	380 MPa Show Material materials with Yield strength Rp0.2 of 380 MPa
	500.0 °C	345 MPa Show Material materials with Yield strength Rp0.2 of 345 MPa
	550.0 °C	285 MPa Show Material materials with Yield strength Rp0.2 of 285 MPa
	600.0 °C	205 MPa Show Material materials with Yield strength Rp0.2 of 205 MPa
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Yield strength Rp0.2, transverse	20.0 °C	600 MPa Show Material materials with Yield strength Rp0.2, transverse of 600 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	20.0 °C	1.02E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.02E-5 1/K
	100.0 °C	1.05E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.05E-5 1/K
	200.0 °C	1.09E-5 - 1.1E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.09E-5 - 1.1E-5 1/K
	300.0 °C	1.13E-5 - 1.15E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.13E-5 - 1.15E-5 1/K
	400.0 °C	1.16E-5 - 1.2E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.16E-5 - 1.2E-5 1/K
	500.0 °C	1.2E-5 - 1.23E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.2E-5 - 1.23E-5 1/K
	600.0 °C	1.22E-5 - 1.25E-5 1/K Show Material materials with Coefficient of thermal expansion of 1.22E-5 - 1.25E-5 1/K
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Max service temperature, long		0 - 600 °C Show Material materials with Max service temperature, long of 0 - 600 °C
Melting point		1370 - 1530 °C Show Material materials with Melting point of 1370 - 1530 °C	Typical for Martensitic Stainless Steel
Specific heat capacity	20.0 °C	439 J/(kg·K) Show Material materials with Specific heat capacity of 439 J/(kg·K)
	100.0 °C	474 J/(kg·K) Show Material materials with Specific heat capacity of 474 J/(kg·K)
	200.0 °C	498 J/(kg·K) Show Material materials with Specific heat capacity of 498 J/(kg·K)
	300.0 °C	517 J/(kg·K) Show Material materials with Specific heat capacity of 517 J/(kg·K)
	400.0 °C	538 J/(kg·K) Show Material materials with Specific heat capacity of 538 J/(kg·K)
	500.0 °C	564 J/(kg·K) Show Material materials with Specific heat capacity of 564 J/(kg·K)
	600.0 °C	598 J/(kg·K) Show Material materials with Specific heat capacity of 598 J/(kg·K)
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Thermal conductivity	20.0 °C	24 W/(m·K) Show Material materials with Thermal conductivity of 24 W/(m·K)
	100.0 °C	24 - 24.4 W/(m·K) Show Material materials with Thermal conductivity of 24 - 24.4 W/(m·K)
	200.0 °C	24.8 - 25 W/(m·K) Show Material materials with Thermal conductivity of 24.8 - 25 W/(m·K)
	300.0 °C	25 - 25.1 W/(m·K) Show Material materials with Thermal conductivity of 25 - 25.1 W/(m·K)
	400.0 °C	25.6 - 26 W/(m·K) Show Material materials with Thermal conductivity of 25.6 - 26 W/(m·K)
	500.0 °C	26 - 26.1 W/(m·K) Show Material materials with Thermal conductivity of 26 - 26.1 W/(m·K)
	600.0 °C	26 - 26.4 W/(m·K) Show Material materials with Thermal conductivity of 26 - 26.4 W/(m·K)
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Thermal diffusivity	20.0 °C	7.1 mm²/s Show Material materials with Thermal diffusivity of 7.1 mm²/s
	100.0 °C	6.3 mm²/s Show Material materials with Thermal diffusivity of 6.3 mm²/s
	200.0 °C	6 mm²/s Show Material materials with Thermal diffusivity of 6 mm²/s
	300.0 °C	5.7 mm²/s Show Material materials with Thermal diffusivity of 5.7 mm²/s
	400.0 °C	5.4 mm²/s Show Material materials with Thermal diffusivity of 5.4 mm²/s
	500.0 °C	4.9 mm²/s Show Material materials with Thermal diffusivity of 4.9 mm²/s
	600.0 °C	4.1 mm²/s Show Material materials with Thermal diffusivity of 4.1 mm²/s
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Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	6.03E-7 Ω·m Show Material materials with Electrical resistivity of 6.03E-7 Ω·m
	100.0 °C	6.68E-7 Ω·m Show Material materials with Electrical resistivity of 6.68E-7 Ω·m
	200.0 °C	7.43E-7 Ω·m Show Material materials with Electrical resistivity of 7.43E-7 Ω·m
	300.0 °C	8.17E-7 Ω·m Show Material materials with Electrical resistivity of 8.17E-7 Ω·m
	400.0 °C	8.9E-7 Ω·m Show Material materials with Electrical resistivity of 8.9E-7 Ω·m
	500.0 °C	9.62E-7 Ω·m Show Material materials with Electrical resistivity of 9.62E-7 Ω·m
	600.0 °C	1.04E-6 Ω·m Show Material materials with Electrical resistivity of 1.04E-6 Ω·m
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Chemical properties

Property	Value
Carbon	0.2 - 0.26 % Show Material materials with Carbon of 0.2 - 0.26 %
Chromium	11 - 12.5 % Show Material materials with Chromium of 11 - 12.5 %
Manganese	0.3 - 0.8 % Show Material materials with Manganese of 0.3 - 0.8 %
Molybdenum	0.8 - 1.2 % Show Material materials with Molybdenum of 0.8 - 1.2 %
Nickel	0.3 - 0.8 % Show Material materials with Nickel of 0.3 - 0.8 %
Phosphorus	0.02 - 0.03 % Show Material materials with Phosphorus of 0.02 - 0.03 %
Silicon	0.2 - 0.5 % Show Material materials with Silicon of 0.2 - 0.5 %
Sulfur	0.007 - 0.02 % Show Material materials with Sulfur of 0.007 - 0.02 %
Vanadium	0.25 - 0.35 % Show Material materials with Vanadium of 0.25 - 0.35 %

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