A Comparative Analysis of S45C, S55C, and SUJ2 Hard Chrome Plated Steel Bars

S45C Induction Harden Hard Chrome Plated Steel Bar:

• Material:
  JIS S45C
  DIN C45, CK45, 1.1191
  AISI 1045
  EN-8
  BS 970-1955 080M40
  
  

• Composition and Basic Properties:
  S45C belongs to the carbon steel category according to the Japanese standard JIS G4051.
  As a medium carbon steel, it has a balanced mix of strength, ductility, and wear resistance.
  
  

• Hardening Hardness:
  After undergoing induction hardening, the surface hardness of S45C generally reaches a range of HRC 55 ± 2.
  
  

• Chrome Plating:
  The subsequent hard chrome plating, applied after the induction hardening, provides added wear resistance, protection against corrosion, and a decrease in the coefficient of friction.
  While the chrome plating gives these advantages, it doesn't considerably alter the base hardness achieved through the induction hardening. However, it can extend the material's longevity and provide a polished appearance.
  
  

• Characteristics:
  Machinability and Weldability: S45C offers good machinability, allowing it to be shaped into various forms with ease. Its weldability is also commendable, making it adaptable for different applications.
  Strength and Hardness: Post heat treatment, S45C falls within a moderate range in terms of strength and hardness, making it versatile for different uses without being overly brittle.
  
  

• Applications:
  Due to its enhanced properties after induction hardening and chrome plating, this steel bar is commonly utilized in:
  Hydraulic piston rods.
  Machine guide rods.
  Gears and axles.
  Column, Automatic Machinery, Injection Molding Machine, Tie bar Other machinery parts where moderate strength and wear resistance are needed.
  Care and Maintenance:
  Even with the protection provided by the hard chrome plating, it's prudent to shield the steel bar from extremely corrosive environments that might compromise the chrome layer and expose the underlying steel.
  
  
  

S55C Induction Harden Hard Chrome Plated Steel Bar:

• Material:
  JIS S55C
  DINC55, 1.0535
  DIN CK55、EN9
  AISI/ASTM 1055
  EN C55E ,1.1203
  BS070M55
  
  

• Composition and Basic Properties:
  S55C is a carbon steel grade according to the Japanese standard JIS G4051.
  Being a medium to high carbon steel, it possesses good balance of strength, toughness, and wear resistance.
  
  

• Hardening Hardness:
  After induction hardening, the surface hardness of S55C typically reaches the range of HRC 60 ± 2.
  
  

• Chrome Plating:
  The hard chrome plating added post-induction hardening improves wear resistance, corrosion resistance, and reduces the coefficient of friction.
  This plating doesn't significantly alter the base hardness achieved through induction hardening but enhances the steel bar's life span and aesthetic appeal.
  
  

• Characteristics:
  Strength and Hardness: Due to its higher carbon content compared to other medium carbon steels like S45C, S55C generally displays higher hardness and strength.
  Machinability: While S55C can be machined, its higher carbon content makes it slightly more challenging to process than lower carbon steels.
  Weldability: Welding S55C might require preheating due to its carbon content to prevent crack formations.
  
  

• Applications:
  Given its enhanced hardness, wear, and corrosion resistance after induction hardening and chrome plating, this steel bar is commonly used in:
  Hydraulic cylinder rods
  Linear motion shafts
  Machine tool spindles
  Guide rods for Liner Motion
  Other applications demanding a balance of strength, wear resistance, and some level of corrosion resistance.
  
  

• Care and Maintenance:
  The S55C Induction Harden Hard Chrome Plated Steel Bar offers a blend of high strength, hardness, wear resistance, and a degree of corrosion protection, making it suitable for various demanding industrial applications.
  
  

SUJ2 Induction Harden Hard Chrome Plated Steel Bar:

• Material:
  JIS SUJ2
  ASTM, AISI 52100
  DIN 100Cr6, 1.3505
  BSEN31
  EN 100Cr6, 1.2067
  
  

• Composition and Basic Properties:
  SUJ2 is classified as a high-carbon, high-chromium bearing steel under the Japanese JIS standard.
  Owing to its composition, it has notable wear resistance, high hardness, and excellent fatigue strength.
  
  

• Hardening Hardness:
  After induction hardening, the surface hardness of SUJ2 generally reaches levels in the HRC 62 ± 2 range or even higher, depending on the specifics of the hardening process.After induction hardening, the surface hardness of SUJ2 generally reaches levels in the HRC 62 ± 2 range or even higher, depending on the specifics of the hardening process.
  
  

• Chrome Plating:
  The hard chrome plating applied post-induction hardening enhances wear resistance, offers better corrosion protection, and reduces friction.
  This plating doesn't change the base hardness achieved via induction hardening substantially but does extend the steel bar's lifespan and provides an aesthetic polished finish.
  
  

• Characteristics:
  Wear Resistance: One of the standout features of SUJ2 is its superior wear resistance due to the high carbon and chromium content.
  Hardness: After heat treatment, SUJ2 exhibits very high hardness, making it suitable for components that endure high pressures and loads.
  Fatigue Strength: Its bearing quality ensures excellent fatigue strength, vital for cyclic loading applications.
  
  

• Applications:
  Given its advanced hardness, wear, and corrosion resistance after induction hardening and chrome plating, this steel bar is extensively used in:
  Bearings and bearing races.
  High precision machinery parts.
  Linear motion systems.
  High load-bearing applications.
  Components exposed to high wear and requiring long lifespan.
  
  

• Care and Maintenance:
  The SUJ2 Induction Harden Hard Chrome Plated Steel Bar showcases high strength, hardness, and wear resistance, making it suitable for critical applications, especially where high precision and long service life are paramount.