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:

Heat treatment specification::

quenching 860℃±20℃, oil cooling;  tempering :460℃±50℃

AC1-755,Ac3-770,Ms-300~305,

Annealing:750C furnace cooling -HBS≤222

Nromalizing : 830~860C air cooling -

MECHANICAL PROPERTIES:

Yield strength: ≥1225(125) (MPa) reduction of area ≥30 (%) elongation ≥5 (%) hardness:
Hot rolled ≤321HB
Our products are widely used in the manufacture of railway locomotives, automobiles, construction machinery, etc.

DELIVERY CONDITION :
normalized ,annealed, black surface ,rough machined or quenched & tempered , should be indicated in contract .
DIMENSION : mm

forged round bar :dia 80-500mm
rolled round bar :dia 16-250mm
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

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:

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.