Coil, sheet, strip, plate 1.4568 X7CrNiAl17-7 SUS631, 17-7PH Stainless Steel For Springs

Material EN 1.4568, DIN X7CrNiAl17-7, 17-7PH, SUS631, UNS S17700

composition – 17% Cr, 7% Ni, 0.05% C, 1.0% Al

a precipitation-hardenable austenitic stainless steel combining high strength, toughness

and excellent corrosion resistance.

Its heat treatment capability allows tailoring the mechanical properties to specific requirements,

making it a versatile choice for demanding applications.

Stainless steel 17-7PH achieves its highest strength through a combination of cold working

(producing martensite) followed by an ageing treatment at approximately 480°C, CH900 condition.
this 17-7PH stainless grade is primarily used for thin sheet and wire.

1.4568 is widely used in aerospace, medical technology, mechanical engineering and automotive industries,

especially for highly stressed springs, clips, clamps, diaphragms, valve components and precision parts.

Typical chemical composition %

Specification

• ASTM F899 AISI 631, UNS S17700, 17-7PH
• ASTM A693
• AMS 5529, sheet, strip, cold rolled
• AMS 5528 sheet, strip and plate
• DIN EN 10151 EN 1.4568 DIN X7CrNiAl17-7

Mechanical properties

Solution annealed

Heat Treatment: 1900-2050°F (1038-1121°C)
Tensile Strength: 150 ksi max (1034 MPa)
Suggested Operating Conditions: up to 900°F (482°C)

Spring Temper, condition C, 3/4H

Tensile Strength: 200 ksi min (1380 MPa)

Spring + Aged (CH 900)

Heat Treatment: 900°F (482°C) for 60 mins
Tensile Strength: 240 ksi min (1650 MPa)

Applications

• Springs
• rings
• washers
• tubing
• clips, clamps

Form of supply

17-7PH stainless steel strip, coil, cut lengths sheet, plate

For Details, please Contact

Wuxi Guanglu Special Steel Co., Ltd. – your productivity partner for precision strip steel.

We are looking forward to your enquiries.
Please call +86 510-8181-2873
or send an email to export@guanglusteel.com