KS STS31 Tool Steel is a high-carbon and high-chromium alloy tool steel that is used for making long-life high-precision cold-work dies. It has good wear resistance and size ability after heat treatment. Otai special steel is KS STS31 tool steel china supplier and stockholders.

Related Specifications A681-1999  | KS G4404(2000) | GB /T1299

Chemical composition of SKS 31 steel
C(％) 0.95～1.05 Si(％) ≤0.35 Mn(％) 0.90～1.20
P(％) ≤0.030 S(％) ≤0.030 Cr(％) 0.80～1.20
Equivalent Of KS STS 31 cold work alloy tool steel
USA Germany China Japan France England Italy Poland Czechia Austria Sweden Spain
– DIN,WNr GB JIS AFNOR BS UNI PN CSN ONORM SS UNE
L3 105WCr6/ 1.24194 CrWMn SKs31 105WCr5 / 10WCr6  2140 105WCR5
Form of Supply

STS31 tool steel, we can supply the round bar, flat bar, plate and square block. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to tight tolerances.

Applications

STS31 Tool Steel is used in the making of Manufacture cutting edge in the job without intense heat tools and quenching deformation requirement when measuring tool and cutting tool, such as knife, long long tap, reamer, milling cutter, die and other types of special tools, and soft cutting non-metallic materials of cutting tool.

steel tool

Regular size and Tolerance

Hot rolled STS 31 steel Round bar: Ø2mm~150mm

Hot Forging STS31 Steel Round bar:Ø5mm~3000mm

Hot rolled Steel plate STS31 Material:       Thickness 5mm to 210mm x Width 210-1250mm

Forged Steel plate SKD31 material: Thickness 130mm to 810mm x Width 210-1250mm

Others have not specified size, pls contact our experienced sales team.

Physical properties of STS31 Tool Steel

Density of STS31 Cold work Alloy Tool Steel: 7.85KG/CM3

Forged Ratio: 5:1 Min

Melting point: 1427 °C

Mechanical properties of STS31 Tool Steel

Tensile strength: 1350 – 2220 MPa

Poisson’s ratio: 0.27-0.30

Processing for STS31 steel

STS31 tool steel round bar and flat sections can be cut to your required sizes. STS31 ground steel bar can also be supplied, providing a high quality tool steel precision ground tool steel bar to your required tolerances. STS31 tool steel is also available as Ground Flat Stock / Gauge Plate, in standard and nonstandard sizes.

Contact our experienced sales team to help you with your STS31 tool steel questions by email or telphone. The questions will be reply in 24 hours.

OTAI SPECIAL STEEL CO., LTD

Email: jack@otaisteel.com   TEL: 0086-769-33232622   FAX: 0086-769-88705839