SHANDONG LE REN SPECIAL STEEL CO., LTD.
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iso grade 8.8 threaded rod and bar
ISO grade 8.8 is one kind of quenched and tempered steel grade in ISO 898 standard which is similar to US grades 5 and B7. ISO898 grade 8.8 Threaded Steel Rod is usually metric threaded steel rod. In ISO898 standard, except grade 8.8 threaded rod, there are also grade 10.9 threaded rod and grade 12.9 threaded rod.
ISO grade 8.8 Threaded Rod we produce is manufactured with rolled threads instead of cut, free from tears or tool marks typically found in cut threads. So the Threaded Rods are smoother and have less surface imperfections that may cause possible failure in severe service applications.
ISO grade 8.8 threaded rod is one of the most economical and most common form of threaded rod and in high demand because of its high strength, excellent heat resistance and resistance to corrosion.
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. class 8.8 threaded rods mechanical property:
| 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 threaded rods sizes:
DIAMETER: M12 - M64
LENGTH: 1M, 2M ,3M, 6M or cut to samll length pieces
| M12 | 1.75mm | M36 | 4mm |
| M14 | 2mm | M39 | 4mm |
| M16 | 2mm | M42 | 4.5mm |
| M18 | 2.5mm | M45 | 4.5mm |
| M20 | 2.5mm | M48 | 5mm |
| M22 | 2.5mm | M52 | 5mm |
| M24 | 3mm | M56 | 5.5mm |
| M27 | 3mm | M60 | 5.5mm |
| M30 | 3.5mm | M64 | 6mm |
| M33 | 3.5mm | | |
4. 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
We can also produce We can also produce iso grade 8.8 polished steel rod, polished steel bar, turned steel bar and peeled steel bar and centreless ground bar.
Shandong Le Ren Special Steel CO., Ltd. owns three factories to produce all kinds of steel rod, steel bar and finished steel products. Among three factories, one is to produce steel bars such as annealed, normalized and quenched and tempered steel bar and pipe, cold drawn, peeled, ground and polished steel bar etc; one is to produce threaded or knurled steel rod and steel bar; another one is to do steel bar, steel rods or steel pipe machining.
In the tactories, we have complete and advanced production, inspection and testing facilities such as shot blasting machines, cold drawing machines,straightening machines, annealing furnace, quenching and tempering furnaces, threading machines, cnc machines, welding machines etc, and inspections and testing facilities to inspect dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc. All of these, including more than twenty years production and exporting experiences, we can supply you good quality products and services.
Our factory is equipped with complete inspection and testing facilities to inspect steel bar dimension tolernaces, corner radius, length, straightness, surface roughness, mechanical properties, AKV, UT testing, Eddy testing and MPI testing etc.
Most of our steel bar are cold drawn, peeled, ground and polished steel bar which require good surface and straightness. So steel bar packing is very important to keep good quality. We use several kinds of steel bar packing according to your technical requirements.
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