Optimum Spring manufactures extension, torsion and compression springs with AISI 302/304 Stainless Steel - Spring Wire Properties
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AISI 302/304 Stainless Steel - Spring Wire Properties

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

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AISI 302/304
ASTM A 313
Nominal Chemistry
Cr17.0-19.0%
Ni8.0-10.0%
Minimum Tensile Strength
psi x 103
125-325
E - Modulus of Elasticity
psi x 106
28
Design Stress % Minimum Tensile 35
G - Modulus in Torsion
psi x 106
10.0
Maximum Operating Temperature
°F
550
Rockwell Hardness C35-45
Density
lb/in3
0.286
Shear Modulus
c GPa
11600 80.0
Method of Manufacture
Chief Uses
Special Properties
Cold drawn, general purpose, corrosion and heat resistant. Magnetic in spring temper.
Equivalent or Common Trade Names ASTM A313
AISI 302
QQ-W-423
UNS S30200
AMS 5688
AMS 5697
SAE J2300
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