PRODUCT NAME :
alloy structure steel
STANDARD:
GB/T3077-1999 EN10083-1 EN10083-3 ISO 683-1
GRADE COMPARISION:
|
GB |
ГОСТ |
ASTM |
BS |
JIS |
NF |
DIN |
|
20Cr |
20X |
5120 |
527A19 |
SCr420H |
18C3 |
20Cr4 |
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
|
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
|
0.18/0.24 |
0.17/0.37 |
0.50/0.80 |
0.035 |
0.035 |
0.70/1.0 |
HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
The first time quenching temperature (℃）：880；coolant : water / oil
The second time quenching temperature （℃）：780～820；coolant ：oil / water
Tempering temperature （℃）：200；coolant : water / air.
Tensile strength :（σb/MPa）：≥835
Yeild strength σs/MPa）：≥540
Elongation （δ5/%）：≥10
Reduction area :（ψ/%）：≥40
Impact （Aku2/J）：≥47
DELIVERY CONDITION :
Heat treatment (normalized / annealed /or tempered ) or no heat treatment . Delivery status 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 |
APPLIED RANGE:
Heat treatment (normalized / annealed /or tempered ) or no heat treatment . Delivery status should be indicated in contract .
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.
