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40Cr cold drawn and QT steel bar
40Cr steel material is one of most common used materials to produce iso grade 8.8 material. 40Cr qt steel bar can be produced as iso grade 8.8 chemical composition to be used to produce iso grade 8.8 threaded rods. ISO grade 8.8 is one kind of alloy quenched and tempered grade in ISO898 standard which is similar to US grades 8 and B7. 40Cr to iso gr 8.8 cold drawn steel bar has better straightness and precision diameter to produce the threaded rods.
1. gr8.8 threaded rods raw material 40Cr or 5140 chemical composition:
|
C |
SI |
MN |
S |
P |
CR |
|
0.38-0.43 |
0.15-0.35 |
0.50-0.90 |
0.035(MAX) |
0.035(MAX) |
0.75-1.20 |
2. iso gr8.8 qt steel bar mechanical properties:
|
Tensile strength |
Yield strength |
Elongation |
Reduction of area |
Hardness |
|
830 |
660 |
12 |
54 |
32 HRC MAX |
Note: The properties can adjust according to your requirements
3. iso grade 8.8 qt steel round bar sizes:
DIAMETER: M8 - M100
LENGTH: 1M, 2M ,3M, 6M or cut to samll length pieces
|
M12 |
M36 |
|
M14 |
M39 |
|
M16 |
M42 |
|
M18 |
M45 |
|
M20 |
M48 |
|
M22 |
M52 |
|
M24 |
M56 |
|
M27 |
M60 |
|
M30 |
M64 |
|
M33 |
|
4. gr8.8 Metric threaded rod weight:
M12
0.69kg
M36
6.63kg
M14
0.93kg
M39
7.86kg
M16
1.24kg
M42
9.05kg
M18
1.57kg
M45
10.51kg
M20
1.98kg
M48
11.84kg
M22
2.44kg
M52
14.13kg
M24
2.86kg
M56
16.37kg
M27
3.58kg
M60
19.00kg
M30
4.54kg
M64
21.21kg
M33
5.61kg
5. Gr8.8 qt steel round bar non-mettalic inclusion:
A
B
C
D
MAX
MAX
MAX
MAX
Thin
2.5
2.0
0.5
0.5
Thick
1.5
1.0
1.0
1.0
7. Gr8.8 qt steel round bar grain straightness:
iso gr 8.8 hot rolled and qt steel round bar: 2mm/m max
iso gr8.8 cold drawn and qt steel round bar: 1mm/m
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Main Product:
Cold Drawn Steel Bar,
Bright Steel Bar ,
Heat Treated Steel Bar and Tube,
Threaded Rods,
High Strength Steel Tie Rod,
High Strength Steel Bolts
