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Home » Product » JIS spring steel » HOT ROLLED JIS SUP9 SPRING STEEL FLAT BAR-Japanese Steel Material Grade

HOT ROLLED JIS SUP9 SPRING STEEL FLAT BAR-Japanese Steel Material Grade

JIS SUP9 SPRING STEEL FLAT BAR

JIS SUP9 SPRING STEEL FLAT BAR is usually produced by LF /EAF /IFF /VD followed by electroslag refining (ESR) if necessary for special purpose.Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers’ requirements.Bars are usually supplied black/bright in the annealed condition.

JIS SUP9 SPRING STEEL FLAT BAR is usually produced by LF /EAF /IFF /VD followed by electroslag refining (ESR) if necessary for special purpose.Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers’ requirements.Bars are usually supplied black/bright in the annealed condition.

 

Chemical composition

Standard Grade Chemical composition (%)
C Si Mn P S

 

Cr Ni
JIS SUP9 0.52-0.60 0.15-0.35 0.65-0.95 ≤0.030 ≤0.030 0.65-0.95

 

Available Size

Thickness: 5mm-115mm

width 50mm-250mm

 

Available Heat Treatment

Annealing/Normalizing/Hardening/Tempering/Quenching

Quenching temperature: 830℃-860℃, oil cooling

Tempering temperature: 460℃-510℃

JIS SUP9 SPRING STEEL FLAT BAR

 

Characteristics

  1. High strength.
  2. High hardenability.
  3. High plasticity and toughness.

JIS SUP9 SPRING STEEL FLAT BAR

 

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 SUP9 SPRING STEEL FLAT BAR

 

Delivery Condition

Hot rolled, black surface

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