SAE 1055/AISI 1055 CARBON STEEL
SAE 1055/AISI 1055 Carbon Steel manufacturers and suppliers,delivered in round rods,square/flat bars,rollers,shafts,blocks and forging pieces.
SAE 1055/AISI 1055 Carbon Steel is a medium carbon steel which is characterized by good weldability, good machinability, high strength and impact properties in either the normalized or hot forged condition. SAE 1055/AISI 1055 steel is widely used for axles, bolts, forged connecting rods, crankshafts, torsion bars, light gears, guide rods etc.
International standard
| EU EN |
USA – |
Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Italy UNI |
Spain UNE |
China GB |
Sweden SS |
Poland PN |
Czechia CSN |
Russia GOST |
Inter ISO |
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| C55 |
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Available Types & Range
C 55 Steel Supply Form & Size
| Form of Supply | Size(mm) | Length(mm) |
| Round bar | Φ50 -Φ650 | Standard or As your request |
| Square bar | 100 x 100 – 450 x 450 | Standard or As your request |
| Forged Flat | 100 x 50 – 400x 650 | Standard or As your request |
| Flat bar/Blcoks | – | – |
Chemical Composition & Technical Specification – C55
| Chemical Composition | ||||||||
| National Standard |
Grade | C | Si | Mn | Cr | Mo | P | S |
| DIN | C55 (1.0535) |
0.52-0.6 | ≤0.4 | 0.6-0.9 | ≤0.4 | ≤0.1 | ≤0.035 | ≤0.035 |
| AISI/SAE | 1055 | 0.5-0.6 | 0.07-0.6 | 0.6-0.9 | – | – | ≤0.04 | ≤0.05 |
| JIS | S55C | 0.52-0.58 | 0.15-0.35 | 0.6-0.9 | ≤0.2 | – | ≤0.03 | ≤0.035 |
| GB | 55 | 0.52-0.6 | 0.17-0.37 | 0.5-0.8 | ≤0.25 | – | ≤0.035 | ≤0.035 |
Mechanical Property( for reference only)
1.Tensile strength: 645MPa
2.Yield point: 380MPa
3.Percentage reduction of area after fracture: 35%
4.Elongation after fracture: 13%
5.Impact test (+20°C): Transverse – 14-25J; Longitud – 36~48J
Heat Treatment
Normalizing For SAE 1055
1.Nominal normalizing temperature:820-850°C
2.Hold the temperature for several hours
3.Cooling in the air
Annealing For SAE 1055
1.Nominal Annealing temperature:650-710°C
2.Cool slowly in the furance
3.Maximum Brinell hardness of 217
Hardening and Tempering(QT) For SAE 1055
1.Nominal Hardening temperature:820-870°C
2.Hold at this temperature then quench in oil or water
3.Tempering as soon as possible when the temperature low to ambient
4.Heat uniformly to the suitable temperature of 600-630°C
5.keep the material out of the furnace ,then cool in the air
