C55/C55E/C55R/DIN1.0535 CARBON STEEL

C55/DIN 1.0535 Carbon Steel manufacturers and suppliers,supplied in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.

C55/DIN1.0535 carbon steel  is a medium carbon steel according to EN10083 and EN 10250 standard.It is usually supplied in an untreated or normalized condition for simple common application ,and also used in quenched and tempered condition for industrial applications. C55/DIN1.0535 steel  is widely used for less exacting springs, shafts, bushings, crankshafts, etc.

C55/C55E/C55R/DIN1.0535 CARBON STEEL

1.Chemical Composition

Grade C Mn Si P S Cr Mo Ni

C55/DIN 1.0535 		Min 0.52 0.6
Max 0.6 0.9 0.4 0.045 0.045 0.4 0.1 0.4

C55E/DIN 1.1203 		Min 0.52 0.6
Max 0.6 0.9 0.4 0.03 0.035 0.4 0.1 0.4

C55R/DIN 1.1209 		Min 0.52 0.6 0.02
Max 0.6 0.9 0.4 0.03 0.04 0.4 0.1 0.4

Remark:Cr+Mo+Ni≤ 0.63%

2.Related Specifications

AISI/ASTM: 1055
BS:070M55 / EN9
JIS / KS:S55C

3.Critical Temperature for Heat Treatment of C55 steel

  • Ac1:727℃
  • Ac3:774℃
  • Ar1:690℃
  • Ar3:755℃

4.Heat Treatment For C55 Steel

  • Normalizing:825℃-885℃,Cool in air
  • Annealing:770-810℃,Cool in furnace
  • Hardening:810 – 850°C,oil quench is recommended
  • Tempering:550°C – 660°C, cool in still air

5.C55/C55E Steel Mechanical Property with Normalized and Tempered condition as per EN10250

Thickness,mm Tensile,Mpa Yield,Mpa Elongation,%
≤100 ≥640 ≥330 L:≥12
T:-
100-250 ≥620 ≥300 L:≥12
T:≥9
250-500 ≥600 ≥260 L:≥12
T:≥9
500-1000 ≥590 ≥250 L:≥11
T:≥8

6.C55E/DIN 1.1203 Steel Mechanical Property with Quenched and Tempered condition as per EN10250

Thickness,mm Tensile,Mpa Yield,Mpa Elongation,%
≤70 ≥700 ≥420 L:≥15
T:-
700-160 ≥630 ≥360 L:≥17
T:≥11
160-330 ≥610 ≥330 L:≥16
T:≥10

7.Hardness Requirements for C55/C55E/C55R

  • Treated to improve shearability(+S):≤255HBW
  • Soft  annealed(+A):≤229HBW
  • Flame or induction hardening: Min 58HRC
  • Water quenching hardness:60-65HRC
  • C55 Steel Tempering Temperature Vs Hardness
Quenching Tempering Temperature,ºC
Temperature,ºC Hardness,HRC 150ºC 200ºC 300ºC 400ºC 500ºC 550ºC 600ºC 650ºC
820ºC 62-63 63 56 50 45 34 30 24 21

8.Supply Size & Condition

  • Round Bars:  Dia.80 – 1,000mm as Forged
  • Flat / Square Bars:  Thickness Max.800mm
  • Shafts, Rollers, Blocks:  Customized or According to Drawing
  • Rolled Round Bars:  Dia.16 – 250mm with UT Assurance

Heat treatment:Quenched and Tempered (+QT), Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled

9.Quality Certification
1.Chemical analysis
2.Mechanical properties
3.Surface hardness
4.Non Metallic Inclusion
5.Heat Treatment Process
6.Grain size
7.Forging ratio
8.Ultrasonic test report

RFQ C55/C55E/C55R/DIN1.0535 STEEL