碳 硅 锰不同
按照国标
Q195
【化学成分】(质量分数)(%)
C:≤0.12
Mn:≤0.50
Si:≤0.30
S:≤0.040
P:≤0.035
脱氧方法:F、b、Z
Q235
Q235分A、B、C、D四级(GB/T 700-2006)
Q235A级含 C ≤0.22% Mn ≤1.4% Si ≤0.35% S ≤0.050 P ≤0.045
Q235B级含 C ≤0.20% Mn ≤1.4% Si ≤0.35% S ≤0.045 P ≤0.045
Q235C级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.040 P ≤0.040
Q235D级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.035 P ≤0.035
Q195
【化学成分】(质量分数)(%)
C:≤0.12
Mn:≤0.50
Si:≤0.30
S:≤0.040
P:≤0.035
脱氧方法:F、b、Z
Q235
Q235分A、B、C、D四级(GB/T 700-2006)
Q235A级含 C ≤0.22% Mn ≤1.4% Si ≤0.35% S ≤0.050 P ≤0.045
Q235B级含 C ≤0.20% Mn ≤1.4% Si ≤0.35% S ≤0.045 P ≤0.045
Q235C级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.040 P ≤0.040
Q235D级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.035 P ≤0.035
碳 硅 锰不同
按照国标
Q195
【化学成分】(质量分数)(%)
C:≤0.12
Mn:≤0.50
Si:≤0.30
S:≤0.040
P:≤0.035
脱氧方法:F、b、Z
Q235
Q235分A、B、C、D四级(GB/T 700-2006)
Q235A级含 C ≤0.22% Mn ≤1.4% Si ≤0.35% S ≤0.050 P ≤0.045
Q235B级含 C ≤0.20% Mn ≤1.4% Si ≤0.35% S ≤0.045 P ≤0.045
Q235C级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.040 P ≤0.040
Q235D级含 C ≤0.17% Mn ≤1.4% Si ≤0.35% S ≤0.035 P ≤0.035
各企业有不同的企业标准