Chemical  Composition
Grade Class  chemical composition(%) deoxidation
C Mn Si S P
less than 
Q195 0.06-0.12 0.25-0.50 0.3 0.05 0.045 F,b,Z
Q215 A 0.09-0.15 0.25-0.55 0.3 0.05 0.045 F,b,Z
B 0.045
Q235 A 0.14-0.22 0.30-0.65 0.3 0.05 0.045 F,b,Z
B 0.12-0.20 0.30-0.70 0.045
C ≤0.18 0.35-0.80 0.04 0.04 Z
D ≤0.17 0.035 0.035 TZ
Q255 A 0.18-0.28 0.40-0.70 0.3 0.05 0.045 F,b,Z
B 0.045  
Q275 0.28-0.38 0.50-0.80 0.35 0.05 0.045 b,Z      
   
   
Mechanical Properties  
Grade牌号 Class等级 strengh  test  impact test 冲击试验
Yield  Strength 屈服点N/(mm²) Tensile Strength 抗拉强度N/(mm²) Elongation 伸长率(%) Temperature 温度 V shaped impact power V型冲击功
钢材厚度(直径)(mm) 钢材厚度(直径)(mm)   vertical(纵向)J
≤16 >16-40 >40-60 >60-100 >100-150 >150 ≤16 >16-40 >40-60 >60-100 >100-150 >150    
less than 不小于 less  than 不小于 less than 不小于
Q195 -195 -185 315-430 33 32
Q215 A 215 205 195 185 175 165 335-450 31 30 29 28 27 26
B 20 27
Q235 A 235 225 215 205 195 185 375-500 26 25 24 23 22 21
B 20  
C 0 27
D -20  
Q255 A 255 245 235 225 215 205 415-550 24 23 22 21 20 19
B 20 27
Q275 275 265 255 245 235 225 490-630 20 19 18 17 16 15
执行标准:
Standards: ASTM A500  GB/T  13793-1992 GB/T 3092-1993 GB/T3091-1993 GB/T3640-1998
产品用途: 建筑用(脚手架等),家具,低压流体输送,零件及结构件,自行车,摩托车等
Usage:  General Construction (Scaffolding,stands,towers),Furniture, Transportation of water,Gas,Air,Steam and Oil etc with relatively Low Pressure
Mechanical parts, Vehicles,ETC.