Size:60.3mm-1016mm*8.5mm-80mm
Grade:20#,35#,45#,27SiMn,30CrMnSiA,30MnNbRe and other grades
Operative Standard:GB/T17396-1998 and other technical standard to the buyer’s need.
|
Name |
Chemical composition (%) |
|||||||||
|
C |
Si |
Mn |
P |
S |
Cr |
Ni |
Cu |
Nb |
RE |
|
|
≤ |
||||||||||
|
20 |
0.17~0.24 |
0.17~0.37 |
O.35~0.65 |
0.035 |
0.035 |
0.25 |
O.25 |
0.20 |
|
|
|
35 |
0.32~0.40 |
O.17~O.37 |
O.50~O.80 |
O.035 |
O.035 |
O.25 |
O.25 |
O.20 |
|
|
|
45 |
0.42~0.50 |
O.17~O.37 |
O.50~O.80 |
O.035 |
0.035 |
0.25 |
O.25 |
0.20 |
|
|
|
27SiMn |
O.24~O.32 |
1.10~1.40 |
1.10~1.40 |
0.035 |
0.035 |
0.030 |
0.030 |
0.030 |
|
|
|
30MnNBRE |
0.27~O.36 |
O.20~0.60 |
1.20~1.60 |
0.035 |
0.035 |
0.030 |
0.030 |
0.030 |
0.020~0.050 |
0.02~O.04 |
Mechanical Property
|
Name |
Sample thermal treatment |
Tensile strength ób/MPa |
yield point ó s/MPa |
tensile stretch δ 5(%) |
reduction of area (%) |
Akv Aku2/J |
HBS≤ |
|
≥ |
|||||||
|
20 |
|
400 |
245 |
20 |
|
|
|
|
35 |
51O |
305 |
17 |
|
|
|
|
|
45 |
590 |
335 |
14 |
|
|
|
|
|
27SiNn |
(920±20)°Cquench (450±50)°Ctemper refrigerant:oil and water |
980 |
835 |
12 |
40 |
39 |
217 |
|
30MnNbRE |
(880±20)°Cquench (450±50)°Ctemper refrigerant:AC |
850 |
720 |
13 |
45 |
48 |
|
