Where are induction hardened chromed shaft and SAE4140 hard chrome bar be used?

Golden Asia is a professional manufacturer of cylinder tube, seamless carbon steel, hard chrome piston rod, induction hardened chromed shaft and SAE4140 hard chrome bar for hydraulic cylinder and pneumatic cylinder.

In order to satisfy varieties industry, such as heavy machinery, the industry of hydraulics, mining and agricultural machinery, Golden Asia devotes to providing different mechanical properties of piston rod, such as induction hardened, quenched and tempered.

• Induction hardened piston rod

  
  

  The process of induction hardening can enhance the mechanical properties of ferrous and alloy components in a specific part. Typically, the material of doing induction hardening includes 1045, 20MnV6, 4140 and 4340. First, the piston rod will be put into a copper coil, and it’s heated by alternating current. Then, the outer surface of the piston rod will be heated to a temperature above the transformation range. After that, the piston rod will be tempered immediately to adjust the hardness level. The final surface hardness of the piston rod will be HRC 55° ± 2°, and the hardened depth is from 0.5mm to 1.5mm.
  
  Compared with the standard piston rod, the induction hardened one increases its hardness, wear resistance and fatigue life. Thus, it is ideal for gears, crankshafts and drive shafts. Golden Asia supplies complete piston rod sizes from 6mm to 255mm.
  Here is the specification below:

  
  
  

  External Diameter Accuracy：	f8
  Surface Roughness：	max Ra 0.2μm
  Hard Chrome Thickness：	<Φ22.225mm: min 15 μm ≧Φ24mm: min 20 μm
  Surface Hardness：	HRC 55° ± 2°
  Hardened depth：	0.5mm – 1.5mm
  Straightness：	<Φ20mm: max 0.25/1000mm ≧Φ20mm : max 0.2/1000mm
  Roundness：	tolerance × 1/2
  Standard Length：	2M - 6M
  Standard Size：	Φ6 ~ Φ255 (Φ1/4” ~ Φ10”)
  Steel Grade：	JIS S45C, S55C, SAE1045, DIN CK45, 20MnV6, JIS SCM440, other specification can be supplied upon request

• SAE 4140 quenched and tempered piston rod

  
  

  The quenching and tempering process can strengthen materials and improve mechanical properties, and the process can be applied to ferrous and alloy components, such as 4140 and 4340. The quenching and tempering process heats the piston rod to extreme temperature first. Then, the piston rod will be cooling by water, air, oil or using inert gases such as nitrogen. In the whole process, the heating temperature and cooling method should be examined precisely, because different variations have an influence on material strength. The quenching and tempering process makes piston rod much tougher, more ductile and less brittle.
  The piston rod with quenched and tempered has greater strength and abrasion resistant. Hence, Golden Asia recommends SAE 4140 quenched and tempered piston rod to use in construction application, such as dumping truck and mining equipment. Our standard size of SAE 4140 quenched and tempered piston rod ranges from 10mm to 200mm.
  Here is the specification below:
  
  

  External Diameter Accuracy：	f7, f8
  Surface Roughness：	Ra max 0.2 μm
  Hard Chrome Thickness：	<Φ22.225mm: min 15 μm ≧Φ24mm: min 20 μm
  Surface Hardness：	min HV 850
  Straightness：	<Φ20mm: max 0.25/1000mm ≧Φ20mm: max 0.2/1000mm
  Roundness：	tolerance × 1/2
  Standard Length：	2M - 6M
  Standard Size：	Φ10 ~ Φ200 (Φ1/4” ~ Φ10”)
  Steel Grade Equivalent：	JIS G4105(SCM440), SAE4140, DIN 42CrMo4, EN 42CrMo4, EN19
  Upon request：	treatment of induction Quenched and Tempered, 42CrMo4 QT, Induction Hardening 4140, EN19

Golden Asia is recognized as a leading company in the market of hydraulics. Especially our induction hardened piston rod and SAE 4140 quenched and tempered piston rod has successfully gained a significant market share in the mechanic, construction and mining industry. We will keep manufacturing high-quality hydraulic key components to satisfy customers'demands.