Material name: Carbon Structural Steel
Standard: GB/t 700-1988
Characteristics and scope of application:
Need to be at room temperature impact test, V-type notch. Has a certain elongation, strength, good toughness and casting, easy stamping and welding, widely used in general mechanical parts manufacturing. Mainly used in construction, bridge engineering, high quality requirements of welded structural parts.
Manganese mn:0.30~0.70 (Boiling steel: 0.30~0.60)
Sulfur S: ≤0.045
Phosphorus p: ≤0.045
CR CR: allowable residual content ≤0.030
Ni-ni: allowable residual content ≤0.030
Copper cu: allowable residual content ≤0.030
Note: Deoxidation method: F, B, Z
Tensile strength Σb (MPa): 375~460
Yield Strength Σs (MPa): ≤16: ≥235; >16~40: ≥225; >40~60: ≥215; >60~100: ≥205; > 100~150: ≥195; >150: ≥185
Elongation δ5 (%): ≤16: When ≥26;>16~40: ≥25;>40~60: ≥24;>60~100: ≥23;>100~150: ≥22;>150: ≥21
Impact work AKV (J): 20 ℃, ≥27
Specimen size: Specimen thickness (diameter)
Heat treatment Specification and metallographic structure:
Specification for heat treatment: hot rolled.
Microstructure: Ferrite + pearlite.
Delivery status: Generally hot-rolled (including controlled rolling) status of delivery. According to the requirements of the parties, the Agreement between the two parties, can also be the fire treatment status of delivery.