PRODUCT NAME :spring steel round bar ( forged ,rolled )
STANDARD:
GB/T1222-2007 ISO 683-14
GRADE COMPARISION:

ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:

HEAT TREATMENT SPECIFICATION:

Hot rolled coil rod annealed or not .cold drawn wire annealed.

Quenching :850℃±20℃,oil cooling , tempering 500℃±50℃

Tensile strength:σb (MPa):≥1274(130)

Yield strength:σs (MPa):≥1127(115)

Elongation:δ5 (%):≥10

Reduction of area :ψ (%):≥40

Hardness :≤321HB

MECHANICAL PROPERTIES:
DELIVERY CONDITION :
normalized ,annealed, black surface ,rough machined or quenched & tempered , should be indicated in contract .
DIMENSION : mm
length : forged bar free length 4-5.8M,rolled bar 5.8M. for customers special requirment, the bar length can do 20 meters long.
APPLIED RANGE:

Our products are widely used in the manufacture of railway locomotives, automobiles, construction machinery, etc.

REMARK:
Above listed parameters and sepcification only for reference . Specific parameters according to standard. Requirments beyond standard will be negotiate by both sides .
Delivery state:annealed, spheroidal annealed, quenched & tempered ,bright bar, cold-drawn, etc.
Listed specifications are only typical grades; products of required specifications can be developed/produced per international, Chinese or industry standards, or based
on agreements with customers.

forged round bar :dia80-500mm
rolled round bar :dia16-250mm
coild rod : dia 5.5-20mm
wire :dia 0.2-13mm
rolled flat bar :thickness 5-90× width 44-300mm
forged flat bar:thickness 120-800×width 120-800

Packing :
Forged bar , rolled bar and coil packing in loose . Rolled wire packing in plastic woven cloth or wooden case.