SHANDONG LE REN SPECIAL STEEL CO., LTD.
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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
Established in April, 2009, SHANDONG LE REN SPECIAL STEEL CO., LTD. is specialized in trading steel products and supplying technical service in domestic and international markets. Through ten years` rich experience, we have forged one professional team.
Adhering to "Beyond customers` expectation, Realizing staff`s dream" philosophy, our company is developing rapidly by supplying customers with good quality products and professional service. In the year 2016, our factory SHANDONG LE SHAN MACHINERY CO., LTD. built cold drawing, peeling, grinding production lines; annealing, normalizing, quenching & tempering heat treatment production lines; chamferring and threads rolling production lines. To guarantee the products quality, we also installed full sets of testing and inspecting machines. All of this urge us to meet the customer`s personalized demands.
Our major products includes cold drawn steel products such as steel bars and profiles, peeled steel bright bars, heat treated steel bars, threaded rods, high strength tie rods, prestressed anchor bolts in wind power industry and high strength anchor bolts.
The current annual productivity is 40000 tons, we aim to build 100000 tons high strength deformed bars and anchor bolts production line. Our products are widely used in machinery components, oil and gas, railways, bridges and mining etc industries. With the service philosophy, advanced production facilities, full sets of test and inspection equipment, we will keep improving to supply customers` better and better quality approved products and service.
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