Place of Origin: | CHINA |
Brand Name: | DALLAST |
Certification: | SGS TUV |
Model Number: | Model |
Minimum Order Quantity: | 1 |
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Price: | Negotiable |
Packaging Details: | Wooden box |
Delivery Time: | 15-25DAYS |
Payment Terms: | T/T |
Supply Ability: | 100000PCS/YEAR |
Material: | 45# 42CrMo 40Cr 40CrMo4 | Color: | Black |
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NSS: | Endure1000 Hours | Type: | Hollow/Solid Rod |
Application Environment: | At Sea Or In Harsh Environments | Surface Hardness: | >HV850 |
High Light: | chrome plated round bar,piston rod cylinder |
40Cr 40Crmo4 42CrMo Piston Hollow Rods Hard Chrome Plated Steel Bar For Hydraulic Ram NSS 1000 Hours
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specification | φ3-φ12 | φ16-φ25 | φ30-φ50 | φ55-φ100 | φ105-φ120 | |
Length | 200-2000 | 200-3000 | 200-5000 | 200-10000 | 1000-10000 | |
Scheduling axis hardness | HB220-280 | |||||
Surface hardness | >860 HV0.1 | The straightness | 0.15/1000mm | |||
Accuracy | g6 grade h7 grade | Hardened layer depth | 0.8-3mm | |||
Roundness tolerance |
<=0.01 |
APT thickness | 10um-40um | |||
Full length tolerance |
<=0.02 |
The materiel | 42CrMo4 | |||
Surface roughness | Ra 0.2- 0.4 |
Heat treatment
2. After quenching, put into the oil tank to cool from the box furnace
3. After cooling, the first time tempering: tempered at 640 °C and the hardness is controlled at about HRC28-32, the first time tempering cooling is used Water-cooled.
4. Straightening: The outer circle is controlled by 200 um(0.2mm) ;
straightening equipment:
three-roller straightening machine;
hydraulic straightening machine (multipoint straightening)
5. The second tempering removes the hard force, the temperature is about 480 °C, and Keep warm for 2 -2.5hours ; release 80% more or less
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 |
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NSSTesting Standing ISO9227:2017
· Sal solution: 50 (+/- 5) g/l of NaCl. Water is demineralized and salt purity is 99.5%.
· Environmental temperature: 35 °C.
· pH of salt solution is 6.8.
· Volumen of salt solution is 38.4 ml/day.
· Density of salt solution is 1,030 g/cm3.
· Spraying is 1.5 (+/- 0.5) ml/h.
Test Result :NSS can endure 300 hours ;500 hours; 800 hours
SGS NSS Testing Report TUV NSSTesting Repopt
Main hydraulic cylinder parts:
Precision cold drawn steel, honing steel, precision piston rod, hydraulic cylinders and various hydraulic system design and manufacturing. The company has a professional production plant, for many years engaged in hydraulic engineering research and design experts and have rich practical experience in engineering and technical personnel, a dedicated production equipment, advanced production technology, and improve the quality assurance system to ensure product quality , With the best after-sales service for customers value.
Contact Person: Mr. Aaron
Tel: +8613202289099
Fax: 86-755-32948288
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