Hollow metal rod
Made of cold drawn seamless tubes or hollow bars, by grinding and precision polishing on the outside diameter and then chrome plated to a certain thickness on the OD,Hollow Chrome Plated Bar is known as chrome plated tube,and they also called chrome plated OD tubing.
Gastac is theprofessional hollow chrome plated bar manufacturer and supplier, Gastac has been supplying and exporting hollow chrome bar from China for almost 5 years, if you have any requirements,welcome to call or e-mail us without hesitation.
Material: CK45, SAE1045, 4140, 4340, JIS45C, 40Cr, 20MnV6, 42CrMo, SS431, SS430,
Stainless: Steel 304/316/2205, etc
Diameter: Φ6-500mm
Length: max 20 meters
Chrome layer: min 20/25/30/50 Micron or customized
Hardness of the chrome layer: 850 HV(min)-1150HV
Roughness: Ra <= 0.4
Straightness: <=0.2/1000
Diameter tolerance: ISO f7/f8/f9/h8/h9 or as request
Roundness: Half of the tolerance ISO f7
Heat treatment Type:1) Normal no heat 2)Q+T(Quenched+Tempered) 3)Induction Hardened
Delivery condition:
Hard Chrome Piston Rod(HRC 15-20);
Quenched & Tempered( Q+T) Rod(HRC 28-32);
Induction Hardened Rod( HRC 55-62);
Q+T Induction Hardened Rod(HRC 60-65)
Corrosion resistance: Test in natural salt spray according to ASTM B 117-96 hours
Packing: Anti-rust oil to be spread on rod surface and each rod to be packed in paper roll and then in wooden case
1.CHEMICAL COMPOSITION
| Materil | 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 |
2.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 |
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