Comparison of Stainless Steels - Spring Wire Properties

The use of stainless steel springs has increased considerably in recent years. Several new compositions are now available to withstand corrosion. The following materials can be used for high temperatures up to 650°F.

convert to metric units

AISI 302/304
ASTM A 313

AISI 316
ASTM A 313

17-7 PH
ASTM A 313 (631)

Nominal Chemistry

Cr	17.0	-	19.0%
Ni	8.0	-	10.0%

Cr	16.0	-	18.0%
Ni	10.0	-	14.0%
Mo	2.0	-	3.0%

Cr	16.0	-	18.0%
Ni	6.5	-	7.5%
Al	0.75	-	1.5%

Minimum Tensile Strength
psi x 10³

125-325

110-245

Cond CH
235-335

E - Modulus of Elasticity
psi x 10⁶

29.5

Design Stress % Minimum Tensile

G - Modulus in Torsion
psi x 10⁶

10.0

11.0

Maximum Operating Temperature
°F

550

650

Rockwell Hardness

C35-45

C38-57

Density
lb/in³

0.286

Shear Modulus
c GPa

Method of Manufacture
Chief Uses
Special Properties

Cold drawn, general purpose, corrosion and heat resistant. Magnetic in spring temper.

Cold drawn. Heat resistant and better corrosion resistance than 302. Magnetic in spring temper.

Cold drawn & precipitation hardened after fabrication. High strength and general purpose corrosion resistance. Slightly magnetic in spring temper.

Equivalent or Common Trade Names

ASTM A313
AISI 302
QQ-W-423
UNS S30200
AMS 5688
AMS 5697
SAE J2300

UNS S31600
ASTM A313
AISI 316
AMS 5690
QQ-W-423
SAE 30216

17-7 stainless steel
UNS S17700
ASTM A313
ASTM A613
AISI 631
AMS 5678
AMS 5529
SAE J217

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