Applications: Tool Steel for universal use , cutting tools, blanking and stamping dies , thread cutting tools, machine knives for the wood paper and metal working industries, broaches, measuring tools, plastic moulds.
1.Class of material: Cold work tool steel
2.Type: O2
3.O2 tool steel Shape:round bar
4.O2 tool steel Delivery condition: Annealed
5.Standard: ASTM681-2008
8.O2 tool steel Materials and Manufacture:ELECTRIC ARC AND VACUUMDEGASSING
9.O2 tool steel Chemical composition :
| Composition |
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| Element |
C |
Mn |
P |
S |
Si |
Cr |
V |
W |
Mo |
| |
Min |
Max |
Min |
Max |
Max |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
Min |
Max |
| Weight % |
0.85 |
0.95 |
1.40 |
1.80 |
0.03 |
0.03 |
- |
0.50 |
- |
0.50 |
- |
0.30 |
- |
- |
- |
0.30 |
The chemical composition thus deter-mined shall not vary from the limits specied in ASTM61-2008
9. O2 tool steel Hardness requirement:217 HB(MAX)
In accordance with the latest issue of Test Methods and Denitions A370
10. O2 tool steel Macrostructure:
In accordance with the latest issue of PracticeA561, free of excessive porosity, segregation, slag, dirt or other nonmetallic inclusions ,pipe, checks, cracks, and other injurious defects.
11.O2 tool steel Decarburization:
In accordance with the latest issue of Guide E3
Free of scale and decarburization.
12. O2 Tool steel Permissible Variations for Dimensions:
O2 de-carb free rounds are produced .015-.035 oversize. O2 de-carb free flats and squares are produced .015-.035 oversize on thickness, and widths are milled or cut oversize sufficiently to clean to nominal size.
O2 ground flat stock, produced in standard 18" and 36" lengths, is available in standard precision ground (+/-.001" on thickness, +.005/-.000" on width), and oversize ground (+.010/+.015 on thickness and width).
O2 drill rod (36" long standard length and 144" available) tolerances on diameter are as follows:
.124" rd and less (+/-.0003")
.125" to .499" rd (+/- .0005")
.500 to 2" rd (+/-.001")
According to different shape with the ASTM681-2008
O2 tool steel Ultrasonic Quality
Material shall be ultrasonic ally tested at appropriate stages of the manufacture to ensure the quality, when and as agreed upon between seller and purchaser.
O2 tool steel Cleanliness: with the latest issue of Test Methods E45. The permissible limits shall be agreed upon between seller and purchaser.
Steelmaking Process: EF, EF/EAF+LF+VD, EF/EAF+ESR
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