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PRODUCT NAME :spring steel round bar ( forged ,rolled )
STANDARD:
GB/T1222-2007 ISO 683-14
GRADE COMPARISION:
GB |
|
ASTM |
BS |
JIS |
NF |
DIN |
60Si2MnA |
60C2 A |
9260 |
250A61 |
SUP7 |
61S7 |
65Si7 |
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
C |
Si |
Mn |
P≤ |
S≤ |
0.56/0.64 |
1.50/2.00 |
0.60/0.90 |
0.035 |
0.035 |
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.
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