Jiangsu New Heyi Machinery Co., Ltd
Jiangsu New Heyi Machinery Co., Ltd Be the benchmark in the field of China pneumatic and hydraulic piston rod.
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HY4700 Micro Alloy Steel Grades Chrome Rod For Hydraulic Cylinder
Product Description
1. The micro alloy steel products are developed on the basis of the proprietary technology of the control
rolling and cooling for substituting quenched and tempered 42CrMo4, 40Cr and CK45 with a variety of
mechanical performance requirements.
2. It is mainly used in mechanical manufacturing for the directly turning part of shaft and rod, etc
3. the mechanical property is correspond to quenched and tempered 42CrMo4, 40Cr and CK45 or over
them and very uniform on the whole cross section.
4. Turning performance: Turning performance is commensurate to 42CrMo4, 40Cr and CK45 or be
superior to them.
5. Hardness: Hardness is more uniform on the whole cross section than quenched and tempered
42CrMo4, 40Cr and CK45
6. Micro structure: Ferrite and pearlite with fine and uniform grain size.
Detailed Description
1. MATERIAL: HY4700, HY4520
2. CHEMICAL COMPOSITION(%)
Material | C% | Mn% | Si% | S% | P% | V% | Ni | Cr% | Mo | Cu |
HY4700 | 0.38-0.45 | 1.20 ~1.60 | 0.30~0.50 | ≤0.035 | ≤0.020 | 0.05～0.15 | ≤0.25 | 0.10～0.20 | ≤0.15 | 0.25 |
HY4520 | 0.40 ~0.48 | 0.80 ~1.40 | 0.15 ~0.35 | ≤0.035 | ≤0.035 | ≤0.15 | ≤0.25 | ≤0.25 | ≤0.15 | ≤0.25 |
3. MECHANICAL PROPERTIES
Material | MECHANICAL PROPERTIES | Surface hardness(HBW) | |||||
Rm(MPa) | Rel(MPa) | A% | Z% | KU2(J) |
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HY4700 | Φ35 - Φ100 | 900 - 1100 | ≥650 | ≥16 | ≥35 | ≥39 | 270-340 |
＞Φ100 - Φ140 | 850 - 950 | ≥600 | ≥16 | ≥35 | ≥39 | 270-340 | |
HY4520 | Φ40 - Φ100 | 750 - 900 | ≥520 | ≥19 | ≥40 | ≥39 | 230-290 |
＞Φ100～Φ140 | 750 - 900 | ≥520 | ≥17 | ≥35 | ≥39 | 230-290 | |
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4. SUPPLY CONDITION
Ground and chrome plated
5. CHROME THICKNESS
20 to 30 micron
6. SURFACE ROUGHNESS
Ra≤0.2 micron and Rt≤2 micron
7. TOLERANCES ON DIA
ISO f7 on the diameter
8.OVALITY
Half of the tolerance ISO f7
9. STRAIGHTNESS
≤0.2MM/M
10 .SURFACE HARDNESS
850-1150HV (vickers 100g)
11. COHESION
No craks,breaking or detaching after thermic shock(warming up at 300 celsius degrees
and cooling in water)
12 .POROSITY
Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
13. WELDABILITY
Good
14. CORROSION RESISTANCE
Test in natural salt spray according to ASTM B 117-120hours
Results evaluation according to ISO 4540 RATING 7-10
15. PACKING
Anti rust oil to be applied on material and each rod to be packed in paper sleeve
16. CERTIFICATE
All certificate related with material heat treatment and plating is required
