PRODUCT NAME :
alloy structure steel
STANDARD:
GB/T3077-1999 EN10083-1 EN10083-3 ISO 683-1
GRADE COMPARISION:
|
GB |
ASTM |
BS |
JIS |
DIN |
|
20CrNiMo |
8620 |
805M20 |
SNCM220 |
20NiCrMo2 |
ULTRASONIC STANDARD:
GB/T6402-2008 / SEP921-84. ASTM A388
CHEMICAL COMPOSITION:
|
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Mo |
Ni |
|
0.17/0.23 |
0.17/0.37 |
0.65/0.95 |
0.035 |
0.035 |
0.40/0.70 |
0.20/0.30 |
0.35/0.75 |
HEAT TREATMENT SPECIFICATION & MECHANICAL PROPERTIES:
Quenching temperature （℃）：850
Tensile strength σb (MPa)：≥980(100)
Yeild strength σs (MPa)：≥735(80)
elongation δ5 (%)：≥9
Reduction area ψ (%)：≥40
Impact Akv (J)：≥47
Hardness ：≤229
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:
Used for make gear in drive system and engine of small and medium size automobile , tractor. Also can make carburized parts
cyaniding parts which required higher
performance in center. Such as claw and cone body of roller bit which used in oil drilling and metallurgy open-air mining. Also
can make gear whole rotor of steam
turbine , connecting rod of internal combustion engine, and valve section forgings .
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.
