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Home » Product » JIS spring steel » HOT ROLLED JIS SUP7 Spring Steel Flat Bar-Japanese Steel Material Grade

HOT ROLLED JIS SUP7 Spring Steel Flat Bar-Japanese Steel Material Grade

JIS SUP7 Spring Steel Flat Bar

JIS SUP7 Spring Steel Flat Bar is high-silicon grade especially designed for its spring properties.SUP7 spring steel is a high quality Alloy Spring Steel,it belong to the high quality high carbon alloy Spring Steel.

JIS SUP7 Spring Steel Flat Bar is high-silicon grade especially designed for its spring properties.SUP7 spring steel is a high quality Alloy Spring Steel,it belong to the high quality high carbon alloy Spring Steel.

 

Similar Grades

Spring steel: 60Si2Mn ASTM9260/DIN:1.0906 1.5028 1.0961/JIS SUP7

 

Chemical composition

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

 

Cr Ni
JIS SUP7 0.56-0.64 1.80-2.20 0.70-1.10 ≤0.030 ≤0.030

 

Mechanical Properties

Quantity Value Unit
Young’s modulus 200000 – 200000 MPa
Tensile strength 650 – 880 MPa
Elongation 42972 %
Fatigue 275 – 275 MPa
Yield strength 350 – 550 MPa

 

Physical Properties

Quantity Value Unit
Thermal expansion 10-10 e-6/K
Thermal conductivity 25 – 25 W/m.K
Specific heat 460 – 460 J/kg.K
Melting temperature 1450 – 1510 °C
Density 7700 – 7700 kg/m3
Resistivity 0.55 – 0.55 Ohm.mm2/m

JIS SUP7 Spring Steel Flat Bar

Available Size

Hot rolled flat bar:

thickness: 5mm-115mm,

Width:50mm-250mm

 

Available Heat Treatment

Annealing/Normalizing/Hardening/Tempering/Quenching

Quenching temperature: 830℃-860℃, oil cooling

Tempering temperature: 490℃-540℃

 

Characteristics

  1. High strength.
  2. High hardenability.

 

Application

Leaf and truncated conical springs for automotive and general engineering

JIS SUP7 Spring Steel Flat Bar

Delivery Condition

Forged, black surface/ turned surface with customers’ required heat treatment

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