PRODUCT NAME :
alloy structure steel
STANDARD:
GB/T3077-1999 EN10083-1 EN10083-3 ISO 683-1
GRADE COMPARISION:
|
GB |
ASTM |
BS |
DIN |
|
40MnBH |
1541 |
39MnCrB6-2 |
39MnCrB6-2 |
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
|
C |
Si |
Mn |
P≤ |
S≤ |
B |
|
0.37/0.44 |
0.17/0.37 |
1.0/1.4 |
0.03 |
0.03 |
0.0005/0.0035 |
HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
Normalizing 880～900℃, air cooling . Quenching 850±20℃, oil cooling . Tempering 510±30℃ water cooling.
Notched bar impact strength :αkv (J/cm2)：≥69(7)
Hardness (annealed or tempering )≤207HB,impression diameter≥4.2mm
DELIVERY CONDITION :
normalized ,annealed, black surface ,rough machined or quenched & tempered , should be indicated in contract .
DIMENSION : mm
|
ROUND STEEL BAR |
COIL ROD |
WIRE |
SQUARE/ FLAT |
|
FORGED BAR |
ROLLED BAR |
HOT ROLLED |
COLD DRAW |
FORGED |
ROLLED |
|
80-650 |
16-250 |
∮5.5-20 |
∮0.2-13 |
120-800×120-800 |
5-38×44-150 10-90×60-305 |
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 negotiated 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 as per international, Chinese or i
ndustry standards,or based on agreements with customers.
