PRODUCT NAME :
alloy structure steel
STANDARD:
GB/T3077-1999 EN10083-1 EN10083-3 ISO 683-1
GRADE COMPARISION:
|
GB |
ASTM |
BS |
NF |
DIN |
|
25CrMo |
4125 |
En20A |
25CD4 |
25CrMo4 |
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
|
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Mo |
|
0.22/0.29 |
0.10/0.40 |
0.60/0.90 |
0.035 |
0.035 |
0.90/1.20 |
0.15/0.25 |
HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
quenching temperature （℃）：900
Tensile strength σb (MPa)：≥885(90)
Yeild strength σs (MPa)：≥685(70)
elongation δ5 (%)：≥12
Reduction area ψ (%)：≥50
Impact Akv (J)：≥35
Hardness ：≤212
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 industry standards,or
based on agreements with customers.
