HY4700 Micro Alloy Steel Grades Chrome Rod For Hydraulic Cylinder

 
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(%)

 
 
3. MECHANICAL PROPERTIES
 

 
 
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