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The piston rod of the hydraulic cylinder is made of 45# steel, which is treated with tempering and tempering. The surface is plated with chromium 0.03 ~ 0.05mm thick after turning and grinding.
1. Since there is no oxide layer on the outer wall, and there is no leakage when withstanding high pressure, it can have good performance in terms of use performance.2. The surface roughness, ovality, surface hardness, etc. can be obtained through processing and meet the expected requirements. Moreover, if there is a residual stress layer after processing, the fatigue strength of the cylinder steel pipe can be effectively improved.| Speci -cation | Grade | Chemical Composition [%] | ||||||||||||||
| C | Mn | P | S | Si | Cr | Mo | Cu | Ni | V | |||||||
| Min | Max. | Min | Max. | Max. | Max. | Min. | Max | Min. | Max | Min. | Max | Max | Max | Max | ||
| ASTM A-53 | A | - | 0.25 | - | 0.95 | 0.05 | 0.045 | - | - | - | 0.4 | - | 0.15 | 0.40 for S | 0.4 | 0.08 |
| B | - | 0.3 | - | 1.2 | 0.05 | 0.045 | - | - | - | 0.4 | - | 0.15 | 0.40 for S | 0.4 | 0.08 | |
| ASTM A-106 | A | - | 0.25 | 0.27 | 0.93 | 0.035 | 0.035 | 0.1 | - | - | 0.4 | - | 0.15 | 0.4 | 0.4 | 0.08 |
| B | - | 0.3 | 0.29 | 1.06 | 0.035 | 0.035 | 0.1 | - | - | 0.4 | - | 0.15 | 0.4 | - | 0.08 | |
| c | - | 0.35 | 0.29 | 1.06 | 0.035 | 0.035 | 0.1 | - | - | 0.4 | - | 0.15 | 0.4 | 0.08 | ||
| ASTM A333 & A334 | 1 | - | 0.3 | 0.4 | 1.06 | 0.025 | 0.025 | - | - | - | - | - | - | - | - | - |
| 6 | - | 0.3 | 0.29 | 1.06 | 0.025 | 0.025 | 0.1 | - | - | - | - | - | - | - | - | |
| Speci -cation | Grade | Mechanical Properties | |||||
| Yield Strength | Tensile Strength | % Elongation (G.L. 50 mm WT 8 mm) e (min.) | |||||
| Min. | Min. | ||||||
| PSI | MPa | PSI | MPa | ||||
| ASTM A-53 | A | 30,000 | 205 | 48,000 | 330 | e=625000 A02/U09 | |
| B | 35,000 | 240 | 60,000 | 415 | |||
| ASTM A-106 | A | 30,000 | 205 | 48,000 | 330 | 35L / 25T | |
| B | 35,000 | 240 | 60,000 | 415 | 30L / 16.5T | ||
| c | 40,000 | 275 | 70,000 | 485 | 30L / 16.5T | ||
| ASTM A333 & A334 | 1 | 30,000 | 205 | 55,000 | 380 | 35 | |
| 6 | 35,000 | 240 | 60,000 | 415 | 30 | ||
Product name: | hydraulic cylinder piston rod |
Size: | Ø 6-300mm |
Length: | 3m -8m |
Material: | 45# DIN CK45/JIS 45C/ST52/20MnV6/42CrMo4/40Cr |
Tolerance | ISO f7 |
Chrome thickness: | 20~30micron |
The 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 |
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