Sandvik 1RK95 Stainless Steel – Annealed Condition & Key Properties

Sandvik 1RK95 is a precipitation hardening stainless steel. In the annealed condition the formability is good and by an aging heat treatment the material obtains extensive precipitation hardening.

Properties

General

Property	Temperature	Value
Density	23.0 °C	7.75 - 7.9 g/cm³

Dimension

Property	Value
Thickness	1 - 3.5 mm
Width	10 - 330 mm

Mechanical

Property	Temperature	Value	Comment
Charpy impact energy	23.0 °C	18 J	For a thickness of 2.5mm
Charpy impact energy, transverse	23.0 °C	14 J	For a thickness of 2.5mm
Elastic modulus	23.0 °C	180 - 210 GPa
Elongation	23.0 °C	3.5 - 10 %	For a thickness of 2.5mm
Flexural strength	23.0 °C	1050 MPa	SS-EN ISO 7438:2005
Poisson's ratio	23.0 °C	0.3 [-]	Typical for Steel
Shear modulus	23.0 °C	75 GPa
Tensile strength	23.0 °C	1050 - 1390 MPa	For a thickness of 2.5mm
Yield strength	23.0 °C	1270 MPa
Yield strength Rp0.2	23.0 °C	800 MPa	For a thickness of 2.5mm

Thermal

Property	Temperature	Value
Coefficient of thermal expansion	23.0 °C	1.3E-5 1/K
Specific heat capacity	23.0 °C	450 J/(kg·K)

Chemical properties

Property	Value	Comment
Carbon	0 - 0.05 %
Chromium	11 - 12.5 %
Copper	1.5 - 2.5 %
Iron	71.5 - 79.2 %	Balance
Manganese	0 - 0.5 %	Maximum
Molybdenum	0 - 0.5 %
Nickel	7.5 - 9.5 %
Niobium	0 - 0.5 %
Phosphorus	0 - 0.04 %	Maximum
Silicon	0 - 0.5 %	Maximum
Sulfur	0 - 0.03 %	Maximum
Tantalum	0 - 0.5 %
Titanium	0.8 - 1.4 %

Technological properties

Property
Application areas	Golf clubs
Corrosion properties	The corrosion resistance of Sandvik 1RK95 is between that of the stainless 13% chromium steels and the austenitic stainless steels of the ASTM 304 type. Sandvik 1RK95 has showed good resistance to corrosion attack in the annealed and precipitation hardened condition during salt spray testing according to standard ISO 9227:2006 at 35°C (95°F) in 5% NaCl.
Welding	Due to the low carbon content Sandvik 1RK95 is readily weldable using common welding methods. If welding is performed following tempering, a softer heat affected zone (HAZ) is to be expected adjacent to the weld metal. It is possible to temper the welded material, but in order to get the best material properties it is recommended to perform a solution annealing prior to tempering.

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