What is the difference between steel grade C45 and other grades?
1. Introduction to 45 # High Quality Carbon Structural Steel Grades
45 # steel is a high-quality carbon structural steel widely used in mechanical manufacturing. Its mechanical properties are excellent and its price is relatively cheap.
C45 (1.0503) is a medium carbon high-quality steel with high strength. The Italian UNI standard steel grade C45 is generally used in the normalized state due to poor hardenability. When mechanical properties are required, quenching and tempering treatment is used. Cold deformation plasticity is moderate, and the cutting workability of annealing and normalizing is better than that of quenching and tempering. C45 is a term in the DIN standard, referred to as 45 steel in the national standard, S45C in the JIS standard, and 1045080M46 in the ASTM standard. It is used to manufacture parts with high strength requirements, such as gears, shafts, piston pins, and machined parts, forgings, stamped parts, bolts, nuts, and pipe joints that are not subjected to significant force.
2. Definition of medium carbon high-quality steel: High quality carbon structural steel is a carbon steel with a carbon content of less than 0.8%. This type of steel contains less sulfur, phosphorus, and non-metallic inclusions than carbon structural steel, and has better mechanical properties.
3. C45 reference corresponding steel grade:
Chinese GB standard steel grade 45; Japanese JIS standard steel grade S45C/S48C; German DIN standard material steel grade 1.0503; German DIN standard steel grade C45; British BS standard steel grade IC45/080A47; French AFNOR standard steel grade CC45; French NF standard steel grade C45; Italian UNI standard steel grade C45; Belgian NBN standard steel grade C45-1; Swedish SS standard steel grade 1650; Spanish standard steel grade F.114; AISI/SAE standard steel grade 1045 in the United States; International Organization for Standardization ISO standard steel grade C45E4. C45 Executive standard: EN 10083/2-1991
4. Heat treatment of 45 # high-quality carbon structural steel: normalized, 850; Quenching, 840; Tempering, 600.
Delivery status of 545 steel high-quality carbon structural steel:
Delivered in a non heat treated or heat treated (annealed, normalized, or high-temperature tempered) state. If delivery is required to be in the heat treated state, it should be specified in the contract, and if not specified, it will be delivered without heat treatment.
6. Chemical composition of 45 # high-quality carbon structural steel:
Carbon C: 0.42~0.50, silicon Si: ≤ 0.40, manganese Mn: 0.50~0.80, sulfur S: ≤ 0.045, phosphorus P: ≤ 0.045, chromium Cr: ≤ 0.40, nickel Ni: ≤ 0.40, molybdenum Mo: ≤ 0.10.
Note: High quality carbon structural steel (GB/T699-1999):
Except for the carbon (C) element and a certain amount of silicon (Si) (generally not exceeding 0.40%) and manganese (Mn) (generally not exceeding 0.80%, up to 1.20%) alloy elements that are used for deoxidation, steel does not contain any other alloy elements (excluding residual elements). This type of steel must ensure both chemical composition and mechanical properties. Its sulfur (S) and phosphorus (P) impurity element content is generally controlled below 0.035%. If controlled at 0.030
