C35 Carbon Steel | DIN 1.0501 | AISI 1035 | S35C

C35 steel is a medium carbon, medium tensile steel supplied as-forged or normalized condition.This steel shows excellent forgeability, reasonable strength, toughness and wear resistance. C35 is easily welded with the correct procedure.Due to the carbon content preheating and postheating are required.It has good Machinability after full annealing.Wide range of mechanical properties can be attained by quenching and tempering,as quenched hardness should be approximately 45 HRC

C35 steel

1.C35 steel Supply Form & Size

Form of SupplySize(mm)Length(mm)
Round barΦ6-Φ10003000-10000
Square bar100 x 100-600x6003000-6000

Flat bar/Blcoks
Thickness :120-800

2.Surface Finish&Tolerance

Surface FinishBlack-Forged Black-Rolled Turned   GrindingPolishedPeeledCold Drawn
Tolerance(0,+5mm)(0,+1mm)(0,+3mm)Best h9Best h11Best H11Best H11

3. C35 Steel Chemical Composition&Related Specifications

C35/1.05010.32-0.39≤ 0.40.50-0.80≤ 0.045≤ 0.045

4. C35 Steel Mechanical Property

Diameter d mm≤ 1616-4040-100
Thickness t mm< 88-2020-60
Yield Strength Mpa≥430≥380≥320
Tensile Strength Mpa630-780600-750550-700
Elongation, %≥17≥19≥20
Reduction of area ,%≥40≥45≥50

5.C35 steel Forging

Forging temperature:950-1200℃,air cooling after forging.

6. C35 Steel Heat Treatment

  • Annealing

Full annealing  is carried out from 840-890ºC, followed by furnace cooling at 28ºC per hour, to 650ºC soaking and air cooling.

  • Normalizing

The normalizing temperature range for this grade is typically 860-900ºC,followed by cooling in still air.

  • Hardening

Hardening of C35 steel is carried out from an austenitizing temperature of 830-860ºC,followed by oil or water quenching.

  • Tempering

Tempering after normal hardening and oil or water quenching is carried out at 550-680ºC to give the required mechanical properties as determined by practical experience.

7.C35 Steel Application

C35 steel is one of the most widely used for machinery parts,and used for forged parts where the strength and toughness of the material are appropriate.The following are the major applications of C35 carbon steel:

  • Levers
  • Bolts
  • Nuts
  • Studs
  • Gears
  • Forged shafts
  • Axles