Cold Rolled JIS G 4313 SUS631-CSP-3/4H 0.2-3.0mmt Stainless Steel Strip

Cold Rolled JIS G 4313 SUS631-CSP-3/4H 0.2-3.0mmt Stainless Steel Strip

631 (17-7PH UNS S17700) stainless steel strip is semi-austenitic precipitation hardening stainless steel. It offers high strength and excellent spring performance after aging treatment. Available in thin coil strips with various tempers. Mainly used for aerospace parts, metal springs, diaphragms, bellows and precision elastic components.

631 Stainless Steel Strip (17-7PH / UNS S17700)

Standard: ASTM A693 Product Description 631 (17-7PH, UNS S17700) is precipitation hardening semi-austenitic stainless steel strip. It combines high strength, good elasticity and moderate corrosion resistance. It can achieve greatly improved mechanical properties through precipitation hardening heat treatment. This material is widely produced in thin strip form and can be supplied in different cold rolled tempers. It keeps good toughness after hardening and is commonly used for spring and elastic components.

Chemical Composition (wt%, balance Fe)

C ≤0.09 Mn ≤1.00 Si ≤1.00 P ≤0.040 S ≤0.030 Cr 16.00–18.00 Ni 6.50–7.75 Al 0.75–1.50

Mechanical Properties (Reference, depends on temper & heat treatment)

• Condition A (annealed): Tensile ≥895 MPa, Yield ≥415 MPa, Elongation ≥20%
• Condition TH1050: Tensile ≥1240 MPa, Yield ≥1100 MPa, Elongation ≥9%
• Condition RH950: Tensile ≥1310 MPa, Yield ≥1170 MPa, Elongation ≥6%
• Density: 7.80 g/cm³

Specifications

Thickness: 0.05mm ~ 3.0mm Width: 5mm ~ 600mm Supply form: coils / cut strips Surface: bright annealed, polished, mill finish Temper: A, TH1050, RH950, CH900

Features

1. High strength and good spring property after precipitation hardening
2. Better corrosion resistance than carbon spring steel
3. Can be formed easily in annealed state before heat treatment
4. Thin strip available for precision elastic parts
5. Heat treatment options to adjust final strength

Applications

Springs, pressure diaphragms, aircraft components, aerospace fasteners, bellows, snap rings, precision instrument elastic parts, chemical equipment flexible components, valve springs, electronic spring pieces.