Over the years, we have continued to innovate, surpass ourselves, challenge the limits, and strive to provide customers with 100% quality 35crmo Gas Cylinder Pipe, Ck20 Steel Tube, Honed Steel Pipe. We look forward to your visit and guidance. We have long adhered to the quality policy of high starting point, zero defect creation and customer satisfaction. Each product goes through rigorous testing to ensure optimal performance. Friends from all over the world come to visit our factory. It is our great honor to exchange experience and achieve cooperation with them. You will be cordially welcomed！ We rely on high-quality product quality and a rich product series to provide you with a full range of solutions.
Hard chrome plated hardened round bar Introduction
Hard chrome plated hardened round bar adopts rolling process, which improves the surface anti-corrosion ability, and can delay the production or expansion of fatigue crack, thus improving the fatigue strength of cylinder rod. Roll forming, by forming a layer of cold work roll surface hardening layer, reducing the grinding pair of elastic and plastic deformation of the contact surface, thus improve the abrasion resistance on the surface of the cylinder rod, at the same time avoid the burn caused by grinding.
Descriptions of hard chrome plated bars
Size: | Ø 6-300mm |
Length: | 1-9m |
Material: | CK45/ ST52/ 20MnV6/ 42CrMo4 |
Tolerance | ISO f7 |
Chrome thickness: | 20~30micron |
Hardness of the chrome layer: | 850HV(min) |
Roughness: | Ra 0.2micron (max) |
Straightness: | 0.2/1000mm |
Yield Strength | ≥320 Mpa |
Tensile Strength | ≥580 Mpa |
Elongation | ≥ 15% |
Supply condition: | 1.Hard chrome plated |
2.Induction hardened | |
3.Quenched & Tempered | |
4.Induction hardened with Q&T |
Chemical Composition
Material | C% | Mn% | Si% | S% | P% | V% | Cr% |
Ck45 | 0.42-0.50 | 0.50-0.80 | 0.04 | 0.035 | 0.035 |
|
|
ST52 | 0.22 | 1.6 | 0.55 | 0.035 | 0.04 |
|
|
20MnV6 | 0.16-0.22 | 1.30-1.70 | 0.10-0.50 | 0.035 | 0.035 | 0.10-0.20 |
|
42CrMo4 | 0.38-0.45 | 0.60-0.90 | 0.15-0.40 | 0.03 | 0.03 |
| 0.90-1.20 |
40Cr | 0.37-0.45 | 0.50-0.80 | 0.17-0.37 |
|
|
| 0.80-1.10 |
Mechancial Properties
Material | T.S N/MM2 | Y.S N/MM2 | E%(MIN) | CHARPY | CONDITION |
CK45 | 610 | 355 | 15 | >41J | NORMALIZE |
CK45 | 800 | 630 | 20 | >41J | Q + T |
ST52 | 500 | 355 | 22 |
| NORMALIZE |
20MnV6 | 750 | 590 | 12 | >40J | NORMALIZE |
42CrMo4 | 980 | 850 | 14 | >47J | Q + T |
40Cr | 1000 | 800 | 10 |
| Q + T |
After-sales service:?
1.?Where to buy our products for one year warranty and life long maintenance.?
2.?24-hour telephone service.?
3.?A large stock of components and parts, easily-worn
parts.?
After years of efforts, we can produce mature St52 Hard Chrome Plated Bar for Hydraulic Cylinder Manufacture, many of which are exported to different countries and regions and have been recognized and trusted by our valued customers. Customers all over the world are welcome to visit our factory and negotiate coopeartion with us. We use high-quality raw materials, strictly controlling all production links, and setting up multiple inspection points on the production line to ensure product quality. Our company will become a veritable expert in the application our products.
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