Sandvik Bioline 1RK91 is a precipitation hardening stainless steel specifically designed for applications requiring high strength combined with good ductility in the final product and high formability in the as-delivered condition. The strength is increased after ageing of the final product.
The characteristics in general can be said to be a combination of properties of ordinary austenitic stainless and low alloyed ferritic steels. For example, elastic modulus, mechanical properties and thermal expansion are comparable to ferritic steels (such as low alloyed carbon steels or chromium steels) while corrosion resistance is more comparable to austenitic stainless steels.
Excellent mechanical properties; very high tensile strength and hardness levels can be achieved
Corrosion resistance comparable to ASTM 304L or ASTM 316L depending on condition
Retained mechanical properties at temperatures up to at least 400°C (750°F)
Very good relaxation properties
Good weldability
Standards
ASTM A693
UNS S46910
Product standards
ASTM F899
ISO 16061
Chemical composition (nominal) %
C Si Mn P S Cr Ni Mo Cu Ti Al
≤0.02 ≤0.5 ≤0.5 ≤0.020 ≤0.005 12 9 4 2.0 0.9 0.4
Forms of supply
The following range of strip thicknesses and widths can be supplied as standard. Other dimensions can be offered on request.
Thickness Width Thickness Width
mm mm in. in.
0.015 - 4.00* 2 - 330 0.0006 - 0.158 0.079 - 13
* Depending on requested tensile strength.
The cold-rolled strip can be supplied in coils, bundles, on spools or in cut lengths.
Sandvik Bioline 1RK91 can also be delivered as wire/bar.
Mechanical properties
The possible ranges for the mechanical properties both in the cold-rolled and aged condition are indicated below.
The strength level after ageing depends on the amount of cold deformation and therefore also on the final dimension.
At 20°C (68°F)
Condition Tensile strength, Rm Proof strength, Rp0.2a)
