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

1. High strength.
2. High hardenability.
3. 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