1.HOT ROLLED TOOL STEEL PLATE - MATERIAL GRADE 1.2550
|
W.-Nr. |
AISI |
DIN |
JIS |
UNS |
KS |
|
1.2550 |
S1 |
60WCrV7 |
SKS41 |
T41901 |
|
2.Size Available, shape ,tolerance
|
Surface Condition |
Tolerance |
|
Black / Machined / Sand Blasted |
Thickness: -0/+0.5mm; Width : -0/+10mm; |
|
Random Length |
3.0-5.8m |
|
Plane Curvature |
≦2.5mm/m, total curvature length ≦ 0.25% total length |
|
C Value Allowance |
≦2.5mm |
|
Hot rolled plates Size Available |
(8-110)x(300-1100) mm |
3.Smelting process
EF+LF+VD bottom pour ingot, ESR need indicate in contract
4.Delivery condition
Annealed Black surface. If need machining or sand blasted , normalizing or Q&T need
indicate in contract
5.chemical composition
|
grade |
C |
Si |
Mn |
P |
S |
Cr |
V |
W |
|
1.2550 |
0.55-0.65 |
0.70-1.00 |
0.15-0.45 |
0.03 max |
0.03 max |
0.90-1.20 |
0.10-0.20 |
1.70-2.00 |
6.Hardness: Max.229HB
7.Macrostructure: No visible shrinkage,inclusion, delamination, cracks, bubbles or white spots should be observed on the acid – soaked sample piece
|
Thickness mm |
Center Porosity |
Segregation |
|
class ≦ |
||
|
≤50 |
2.0 |
3.0 |
|
>50-75 |
2.5 |
3.0 |
|
>75-110 |
3.0 |
3.0 |
8.Nonmetallic inclusion
|
Nonmetallic inclusion Type |
thin series |
heavy series |
|
class ≦ |
||
|
A |
3.0 |
2.0 |
|
B |
3.0 |
2.0 |
|
C |
2.0 |
2.0 |
|
D |
2.0 |
2.0 |
9.UT test
standard as per SEP1921 C/c or D/d class. No white spot, slag inclusion, delamination, cracking, shrinkage.
10.Surface quality
There are no visible cracks, folds, scars or inclusions on the surface. If there are any of the above defects, they should be removed with a depth not greater than 4% of the section size and a width not less than 5 times of the depth.
MATERIAL GRADE 1.2550
