Diameter 35 - 140 Mm Micro Alloy Steel Thread Rod Chrome Plating
Diameter 35 - 140 Mm Micro Alloy Steel Thread Rod Chrome Plating
Product Description
1. Micro struction: Ferrite and pearlite with fine and uniform grain size.
2. Turning performance: Turning performance is commensurate to 42CrMo4, 40Cr and CK45 or be
superior to them.
3. Hardness: Hardness is more uniform on the whole cross section than quenched and tempered
42CrMo4, 40Cr and CK45
4. Shortened processing periods, enhance productivity and reduce the occupied capital.
5. Energy conservation: Production no quenched and tempered process greatly saves the energy
consumption.
6. Environments protection: Production no quenched and tempered process meets the requirements of
environmental protection.
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. TOLERANCES ON DIA
ISO f7 on the diameter
7 .SURFACE HARDNESS
850-1150HV (vickers 100g)
8. SURFACE ROUGHNESS
Ra≤0.2 micron and Rt≤2 micron
9. STRAIGHTNESS
≤0.2MM/M
10.OVALITY
Half of the tolerance ISO f7
11. COHESION
No craks,breaking or detaching after thermic shock(warming up at 300 celsius degrees
and cooling in water)
12. CORROSION RESISTANCE
Test in natural salt spray according to ASTM B 117-120hours
Results evaluation according to ISO 4540 RATING 7-10
13 .POROSITY
Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10
14. WELDABILITY
Good
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
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