Domestic steel mold: Q235A
Standard: GB / T 700-1988
● Features and Scope:
Its toughness and ductility is better, there is a certain elongation, with good weldability and hot workability. General use in the hot-rolled state, with its rolled steel, steel, steel, steel can be used in the manufacture of various welding structures, bridges and generally unimportant machine parts, such as bolts, rod, rivets, rings and connecting rod and so on.
● Chemical Composition:
Carbon C: 0.14 ~ 0.22
Si Si: ≤0.30
Mn Mn: 0.30 ~ 0.65
Sulfur S: ≤0.050
Phosphorus P: ≤0.045
Chromium Cr: to allow the residual content ≤0.030
Ni: to allow the residual content ≤0.030
Cu: to allow the residual content ≤0.030
NOTE: deoxidation method: F, b, Z
● Mechanical Properties:
Tensile strength σb (MPa): 375 ~ 460
When> 60 ~ 100; ≥215:: Yield strength σs (MPa): ≤16 time: ≥235;:;> during 16 ~ 40 ≥225> 40 ~ 60 when ≥205;> 100 ~ 150 when: ≥195; > 150: ≥185
Elongation δ5 (%): ≤16 time: ≥26;> during 16 ~ 40: ≥25;> 40 ~ 60 when: ≥24;> 60 ~ 100 when: ≥23;> 100 ~ 150 when: ≥22 ;> 150: ≥21
Sample size: Sample thickness (diameter)
● Heat treatment and microstructure specifications:
Heat treatment: hot.
Microstructure: ferrite and pearlite.
● Delivery status: generally hot-rolled (including controlled rolling) delivery. According to the requirements, by mutual agreement, can also be normalized state of delivery