CK60 | DIN 1.1221 QUALITY CARBON STEEL
In the implementation standard SEW550, CK60/DIN 1.1221 steel belongs to the carbon structural steel with high carbon content among medium carbon steels.
CK60 steel is characterized by high strength, hardness and elasticity, but the disadvantages of CK60 steel are also obvious:lower plasticity, poor machinability, poor welding and hardenability.
Normalizing is often used for large parts of CK60 steel, while quenching is suitable for small parts. CK60 steel is widely used in automobiles, machinery, aviation and other fields due to its excellent high strength, high elasticity and wear resistance.
CK60 /DIN 1.1221 STEEL CHEMICAL COMPOSITION
| Grade | C | Si | Mn | P | S |
| CK60/1.1221 | 0.57-0.65 | ≤0.35 | 0.6-0.9 | ≤0.035 | ≤0.035 |
CK60 /DIN 1.1221 Steel Equivalent Grade
| China-GB 699 | USA-ASTM A29 | UK-BS970 | Japan-JIS G4051 |
| 60# | 1060 | 070M60 | S58C |
CK60 /DIN 1.1221 STEEL Forging
- Initial Forging Temperature：1100℃
- Final Forging Temperature：>850℃
- Forging Ratio：above 4:1
- Cooling Method After Forged:Since the carbon content of CK60 steel is still relatively high, the recommended method is to bury it in sand and cool it slowly after forging to prevent the material from cracking.
CK60 STEEL HEAT TREATMENT
Critical Temperature for Heat Treatment of CK60 Steel
- Ac1:727℃
- Ac3:766℃
- Ar1:690℃
- Ar3:743℃
Temperature Selection for Different Types of Heat treatment for CK60 steel
- Normalizing: 800 – 850°C,Cooling in air,hardness below 229HBW
- Annealing:800 – 820°C,Cooling in furnace,hardness below 179HBW
- Quenching:800-840°C,oil/water quench,quenching hardness:62-63HRC
- Tempering:380-450°C,Tempering hardness:40-45HRC
CK60 Steel Normalizing & Annealing Mechanical Property
| Temperature | Tensile Strength | Yield Strength | Elongation | Reduction of Area | Impact Charpy-V | |
| CK60+N | 850°C | ≥775Mpa | ≥420Mpa | ≥18% | ≥37% | ≥13 J |
| CK60+A | 800°C | ≥625Mpa | ≥370Mpa | ≥22.5% | ≥38% | ≥11 J |
Quality Certification for CK60 STEEL
A material test report(Inspection Certificate EN 10204 3.1) will be provided, documenting the following:
1.Chemical analysis
2.Mechanical properties
3.Surface hardness
4.Non Metallic Inclusion
5.Heat Treatment Process
6.Grain size
7.Forging ratio
8.NDE test method/criteria
Supply Size & Condition For CK60 STEEL
- 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.14 – 130mm with UT Assurance
Heat treatment:Quenched and Tempered (+QT), Normalizing (+N), Annealing (+A)
Surface finish:Black / Rough turned / Peeled
CK60/DIN 1.1221 steel manufacturers and suppliers,supplied with round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
