PRODUCT NAME :
spring steel round bar / rod / wire
STANDARD:
GB/T1222-2007 ISO 683-14
GRADE COMPARISION:
|
GB |
ГОСТ |
ASTM |
BS |
JIS |
NF |
DIN |
|
60Si2MnA |
60C2ГA |
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:
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
DELIVERY CONDITION :
annealed
DIMENSION : mm
|
ROUND STEEL BAR |
COIL ROD |
WIRE |
SQUARE/ FLAT |
|
FORGED BAR |
ROLLED BAR |
HOT ROLLED |
COLD DRAW |
FORGED |
ROLLED |
|
100-700 |
16-250 |
∮5.5-20 |
∮0.2-13 |
120-800×120-800 |
5-38×44-150 10-90×60-305 |
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.
