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Tensile strength of SUP-9 spring wires

keyword
springmaterials
tensilestrength
SUP9

Question Spring Newbie 2017/3/16(Thu) 16:15

Is there data about the tensile strength of each wire diameter of SUP-9 spring wire?

Answer Tokai Spring 2017/3/16(Thu) 17:28

Spring Newbie, thank you for posting!

JIS G 4801: 2011 stated that the tensile strength of SUP9 is 1230 MPa or more, and there is no description of the tensile strength by wire diameter. However, if the wire diameter is large, sufficient strength may not be obtained by quenching, and the allowable stress may be specified according to the wire diameter! Please leave the design of spring steel such as SUP to Tokai Spring!!!

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