As a high-quality carbon structural steel, C35 is defined as an unalloyed steel with a moderate carbon content of 0.35% as per European standards.
C35 steel has appropriate strength, good plasticity and good process performance. Compared with C22 steel, the welding performance is slightly worse, but still acceptable.Normally, C35 steel is used in normalized and quenched and tempered condition.
C35 steel is widely used in the manufacture of various forgings and hot-pressed parts, cold-drawn and upsetting steels, seamless steel pipes, parts in machinery manufacturing, such as crankshafts, rotating shafts, shaft pins, levers, connecting rods, beams, sleeves, wheels Rings, washers, screws, nuts, etc.
C35 STEEL CHEMICAL COMPOSITION
| Standard | Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
| EN10083 | C35/1.0501 | 0.32-0.39 | ≤0.4 | 0.50-0.80 | ≤0.045 | ≤0.045 | ≤ 0.4 | ≤ 0.1 | ≤ 0.4 |
| EN10250 | |||||||||
| DIN 17200 | CK35/1.1181 | 0.32-0.39 | ≤0.4 | 0.50-0.80 | ≤0.035 | ≤0.03 | - | - | - |
| SEW550 | CK35/1.1181 | 0.32-0.39 | ≤0.35 | 0.50-0.80 | ≤0.035 | ≤0.035 | - | - | - |
C35 STEEL RELATED STANDARD & EQUIVALENT GRADE
China | GB 3077:35
USA | ASTM A29:1035
Japan | JIS G4051:S35C
UK |BS970:080M36
France | NFA 33-101:AF55-C35
C35 STEEL PHYSICAL PROPERTY
| Density, g/cm3 | 7.87 |
| Melting point,℃ | 1395 |
| Specific heat capacity，(0~100℃),J/(kg.k) | 482 |
| Linear expansion coefficient,10^-6/k | 12.45(0-100℃) |
| Poisson’s ratio | 0.29 |
| Elastic Modulus,Mpa | 212213 |
| Shear modulus,Mpa | 82080 |
| Thermal conductivity,W/(m.K) | 46(100℃） |
C35 STEEL FORGING
- Initial Forging Temperature：1200℃
- Final Forging Temperature：800℃
- Forging Ratio：above 4:1
- Post-Forging Treatment:C35 steel should be slowly cooling after forged.
C35 STEEL HEAT TREATMENT
Critical Temperature for Heat Treatment of C35 Steel
- Ac1:724℃
- Ac3:802℃
- Ar1:680℃
- Ar3:774℃
Temperature Selection for Conventional Heat treatment for C35 Steel
- Annealing:850 – 880°C,Cooling in furnace,hardness below 187 HBW
- Normalizing:860-900°C,Cooling in air,hardness 137-197 HBW
C35 Steel Annealing Diagram
C35 Steel Normalizing Diagram
- Quenching:840-880°C,Medium:Water,Oil
- Tempering:550-660°C
C35 Steel Mechanical Property with Quenched and Tempered Condition
| Tensile Strength Mpa | Yield Strength Mpa | Elongation % | Reduction of Area % | Impact Charpy-V J |
| ≥530 | ≥315 | ≥20 | ≥45 | ≥55 |
C35 Steel Tempering Temperature Vs Hardness
| Grade | Quenching | Tempering Temperature,ºC | |||||||
| Temperature,ºC | Hardness,HRC | 150ºC | 200ºC | 300ºC | 400ºC | 500ºC | 550ºC | 600ºC | |
| C35 | 860ºC | 49-50 | 49 | 48 | 43 | 35 | 26 | 22 | 20 |
Jominy Quenching Test Curve For C35E Steel
Quenching at 870°C
X:Distance from quenched end,in mm
Y:Hardness,HRC
3: H level
| HRC-mm | Type | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 13 | 15 |
| MIN | +H | 58 | 57 | 55 | 53 | 49 | 41 | 34 | 31 | 28 | 27 | 26 | 25 | 24 |
| MAX | 48 | 40 | 33 | 24 | 22 | 20 | - | - | - | - | - | - | - |
Guideline value Curve for C35 Steel Mechanical Property
X:Tempering temperature,oC
Y:Tensile and Yield Strength,Mpa
Z:Elongation and Reduction in area,%
WHAT WE SUPPLY FOR C35 STEEL
Hot Forged Round bar:Φ80-Φ1000mm
Hot Rolled Round bar:Φ16-Φ350mm
Hot Forged Square bar: Max Thickness:500mm
Flat bar/Blcoks:Thickness :120-800mm ,Width:120-1500mm
| Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0，+5mm) | (0，+1mm) | (0，+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
