9255 spring steel bar/rod


Standards:ASTM A29

Steel mill: SHOUGANG

Size: Out diameter: 1.0-200mm

Length: 2500-6000mm

Delivery condition: Hot Rolled

ASTM 9255 is a type of C-Mn steel used for spring applications. Silicon and manganese in steel can significantly improve elasticity, strength and flexion ratio, hardenability, tempering stability and relaxation stability. ASTM9255 steel bar can be used as a damper plate spring, coil spring, cylinder relief valve spring, and can be used as a heat resisting spring under 250℃.


9255 Equivalent Material

9255 SUP6 55Si7(1.0904) 250A53 55S6,


55C2 55Si2Mn


9255 Chemical Composition

C Mn Si P S
0.51-0.59 0.70-0.95 1.80-2.20 0.035 0.04


9255 Mechanical Property

Tensile Strength, Mpa Yield Strength, Mpa Elongation Hardness,HB
≥1274(130) ≥1176(120) ≥6 ≤302(Hot rolled)

≤321(Cold drawing + heat treatment)


Wiho Steel is a fully stocked and leading metal manufacturer, supplier, exporters, distributors of steel mill-product forms such as  pipe, tubing, bar and rod. The steel products provide by us shall be fabricated from prime quality raw materials and is fully certifiable to industrial specifications like ASTM and ASME or other relevant standards. Wiho Steel can supply and stock a large inventory of ASTM 9255, AISI 9255, SAE 9255(SUP6/55Si7(1.0904)/ 250A53/ 55S6/ 56S7/ 55C2/ 55Si2Mn) round bar for spring. For more information on our extensive steel alloys inventory, please contact us or fill in the form below.

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