HOT ROLLED JIS SUP9A SPRING STEEL FLAT BAR-Japanese Steel Material Grade

JIS SUP9A SPRING STEEL FLAT BAR is Japanese Industrial Standard for spring steel, mainly used for the hot formed springs such as the laminated springs, coiled springs and torsion bar springs.
JIS SUP9A SPRING STEEL FLAT BAR is Japanese Industrial Standard for spring steel, mainly used for the hot formed springs such as the laminated springs, coiled springs and torsion bar springs.
Chemical composition
Standard | Grade | Chemical composition (%) | ||||||
C | Si | Mn | P | S
|
Cr | Ni | ||
JIS | SUP9A | 0.56-0.64 | 0.15-0.35 | 0.70-1.00 | ≤0.030 | ≤0.030 | 0.70-1.00 | — |
Available Size
Thickness: 5mm-115mm,
width50mm-250mm
JIS SUP9A SPRING STEEL FLAT BAR
Available Heat Treatment
Annealing/Normalizing/Hardening/Tempering/Quenching
Quenching temperature: 830℃-860℃, oil cooling
Tempering temperature: 460℃-520℃
Characteristics
- High strength.
- High hardenability.
- High plasticity and toughness.
Application
Large spring under heavy load and high stress condition, like large-section leaf spring and large- diameter sprial spring of automobile and tractors.
JIS SUP9A SPRING STEEL FLAT BAR
Delivery Condition
Hot rolled, black surface
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