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[China]
Trade Verify
Address: Yangshan Industrial Park Huishan District Wuxi Jiangsu China
Contact name:Patty
Jiangsu New Heyi Machinery Co., Ltd |
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Verified Suppliers
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Hard Chromed Plated Hydraulic Hollow Piston Rods Shafts For Shock Absorber
1). Process flow of hydraulic piston rod.
Connecting rod using 35 steel, processing technology: cold-drawn
forming a turning a continuous medium frequency induction
hardening, a cylindrical grinding, a fine grinding cylindrical
shearing section.at finishing plating chromium to hydrogen
tempering shearing section.at fine grinding. In order to improve
the surface quality and corrosion resistance of the piston rod, a
super finishing process was added before chrome plating.
2). Piston rod plating process.
Inspection before plating – pack hanging fixture – chemical
degreasing, electric lift oil – water – activation pickling – water
washing- the moment, the piston rod chromium plating, recycling
water – water washing – unloading hanging fixture – inspection
Detailed Product Description
1. Material: 42CrMo4, 40Cr, CK45,ST52, 20MnV6
2. Standard length: 1000mm - 8000mm
3. Diameter: 6mm - 1000mm
4. Application: Mining machinery industry, textile / printing industry and so on
5. Condition: Chrome plated, Quenched / Tempered, Induction hardened, Q / T Induction hardened
Detailed Description
1. 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 |
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ST52 | 0.22 | 1.6 | 0.55 | 0.035 | 0.04 |
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20MnV6 | 0.16-0.22 | 1.30-1.70 | 0.10-0.50 | 0.035 | 0.035 | 0.10-0.20 |
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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 |
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| 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 |
3. SUPPLY CONDITION
Ground and chrome plated
4. CHROME THICKNESS
20 to 30 micron
5. SURFACE ROUGHNESS
Ra≤0.2 micron and Rt≤2 micro
6. TOLERANCES ON DIA
ISO f7 on the diameter
7.OVALITY
Half of the tolerance ISO f7
8. STRAIGHTNESS
≤0.2MM/M
9. SURFACE HARDNESS
850-1150HV (vickers 100g)
10.COHESION
No cracks,breaking or detaching after thermic shock(warming up at 300 celsius degrees and cooling
in water)
11 .POROSITY
Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
12 CORROSION RESISTANCE
Test in natural salt spray according to ASTM B 117-72hours
Results evaluation according to ISO 4540 RATING 7-10
13. WELDABILITY
Good
14. PACKING
Anti rust oil to be applied on material and each rod to be packed in paper sleeve
15. CERTIFICATE
All certificate related with material heat treatment and plating is required
