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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
Product Categories : Cold Drawn Steel Bar > Cold Drawn Steel Round Bar
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