EN 10088-1 Grade X8CrNiMoAl15-7-2: High-Strength Precipitation-Hardened Steel (P1550)

The material X8CrNiMoAl15-7-2 is comparable to X 7 CrNiMoAl 15 7 acc. to Key to steel 1995 resp. Register of European steel 1994. The precipitation hardenable steel with high strength and hardness shows good corrosion resistance. Application for clamps and springs, surface facings, bottoms for fuel tanks, transport chains, piston rings and valve components.

Properties

General

Property	Temperature	Value
Density	20.0 °C	7.8 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20.0 °C	200 GPa
	100.0 °C	195 GPa
	200.0 °C	185 GPa
	300.0 °C	175 GPa
	400.0 °C	170 GPa

Elongation	20.0 °C	2 %
Elongation A80	20.0 °C	2 %
Poisson's ratio	23.0 °C	0.3 [-]	Typical for Austenitic Stainless Steel
Shear modulus	23.0 °C	77 GPa	Typical for Austenitic Stainless Steel
Yield strength Rp0.2	20.0 °C	1380 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	100.0 °C	1.4E-5 1/K
	300.0 °C	1.44E-5 1/K

Melting point		1230 - 1480 °C	Typical for Austenitic Stainless Steel
Specific heat capacity	20.0 °C	500 J/(kg·K)
Thermal conductivity	20.0 °C	16 W/(m·K)

Electrical

Property	Temperature	Value
Electrical resistivity	20.0 °C	8E-7 Ω·m

Chemical properties

Property	Value
Aluminium	0.7 - 1.5 %
Carbon	0.1 %
Chromium	14 - 16 %
Manganese	1.2 %
Molybdenum	2 - 3 %
Nickel	6.5 - 7.8 %
Phosphorus	0.04 %
Silicon	0.7 %
Sulfur	0.015 %

DIN 17744 NiCr22Mo7Cu Solution-Annealed Alloy – High Corrosion Resistance & Excellent Weldability DIN 2394-2 Grade RSt 28: Normalized or Normalized Formed Steel Specifications

Metal