Page 550 - Shigley's Mechanical Engineering Design

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524 Mechanical Engineering Design
Table 10–3 Name of Similar

High-Carbon and Alloy Material Specifications Description
Spring Steels Music wire, UNS G10850 This is the best, toughest, and most
0.80–0.95C AISI 1085 widely used of all spring materials for
Source: From Harold C. R. ASTM A228-51 small springs. It has the highest tensile
Carlson, “Selection and
Application of Spring strength and can withstand higher
Materials,” Mechanical stresses under repeated loading than
Engineering, vol. 78, 1956, any other spring material.Available in
pp. 331–334. diameters 0.12 to 3 mm (0.005 to
0.125 in). Do not use above 120°C
(250°F) or at subzero temperatures.
Oil-tempered wire, UNS G10650 This general-purpose spring steel is
0.60–0.70C AISI 1065 used for many types of coil springs
ASTM 229-41 where the cost of music wire is
prohibitive and in sizes larger than
available in music wire. Not for shock
or impact loading. Available in
diameters 3 to 12 mm (0.125 to
0.5000 in), but larger and smaller sizes
may be obtained. Not for use above
180°C (350°F) or at subzero
temperatures.
Hard-drawn wire, UNS G10660 This is the cheapest general-purpose
0.60–0.70C AISI 1066 spring steel and should be used only
ASTM A227-47 where life, accuracy, and deflection
are not too important. Available in
diameters 0.8 to 12 mm (0.031 to
0.500 in). Not for use above
120°C (250°F) or at subzero
temperatures.
Chrome-vanadium UNS G61500 This is the most popular alloy spring
AISI 6150 steel for conditions involving higher
ASTM 231-41 stresses than can be used with the
high-carbon steels and for use where
fatigue resistance and long endurance
are needed. Also good for shock
and impact loads. Widely used for
aircraft-engine valve springs and for
temperatures to 220°C (425°F).
Available in annealed or pretempered
sizes 0.8 to 12 mm (0.031 to 0.500 in)
in diameter.
Chrome-silicon UNS G92540 This alloy is an excellent material for
AISI 9254 highly stressed springs that require
long life and are subjected to shock
loading. Rockwell hardnesses of C50
to C53 are quite common, and the
material may be used up to 250°C
(475°F). Available from 0.8 to 12 mm
(0.031 to 0.500 in) in diameter.