Directly Turning Micro Alloyed Steel Chrome Plated Rods For Construction

Directly Turning Micro Alloyed Steel Chrome Plated Rods For Construction
 
 
Product Description

1. The micro alloy steel products are developed on the basis of proprietary technology of the control

    rolling and cooling for substituting quenched and tempered piston rods with a variety of mechanical

    performance requirements.
2. The mechanical property is correspond to quenched and tempered piston rods or over them and

    very uniform on the whole cross section.
3. Hardness is more uniform on the whole cross section than quenched and tempered piston rods

4. Turning performance is commensurate to quenched and tempered piston rods or be superior to them.
5. Micro alloy steel rod mainly used in mechanical manufacturing for the directly turning part of shaft
   and rod, ect
6. The processing period is shortened, and the productivity is enhanced and the occupied capital is
    reduced..
7. The processing cost is low, there is no need of quenched and tempered process and the second
    turning but the mechanical property is correspond to quenched and tempered piston rod

 
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 HARDNESS 
     850-1150HV (vickers 100g)
7. STRAIGHTNESS 
   ≤0.2MM/M

8. TOLERANCES ON DIA
     ISO f7 on the diameter
9.OVALITY 
    Half of the tolerance ISO f7
10. SURFACE ROUGHNESS
     Ra≤0.2 micron and  Rt≤2 micron

11. CORROSION RESISTANCE
     Test in natural salt spray according to ASTM B 117-120hours
     Results evaluation according to ISO 4540 RATING 7-10

12.POROSITY
      Test according to ISO 1456/1458 and result yaluation according to ISO 4540 rating 8-10

13. WELDABILITY
     Good
14. PACKING 
     Anti rust oil to be applied on material and each rod to be packed in paper sleeve

15. COHESION 

     No craks,breaking or detaching after thermic shock(warming up at 300 celsius degrees

    and cooling in water)

16. CERTIFICATE 
      All certificate related with material heat treatment and plating is required