




Grade  | Chemical Composition  | Mechanical Properties  | ||||||
C  | Mn  | Si  | S  | P  | Yield  | Tensile  | Elongati  | |
Strength Mpa  | Strenth Mpa  | -on %  | ||||||
Q195  | 0.06-0.12  | 0.25-0.50  | ≤0.30  | ≤0.045  | ≤0.05  | ≥195  | 315-430  | ≥33  | 
Q215  | 0.09-0.15  | 0.25-0.55  | ≤0.30  | ≤0.05  | ≤0.045  | ≥217  | 335-450  | ≥27  | 
Q235  | 0.12-0.20  | 0.30-0.67  | ≤0.30  | ≤0.045  | ≤0.04  | ≥235  | 375-500  | ≥26  | 
Q345  | ≤0.20  | 1.00-1.60  | ≤0.55  | ≤0.04  | ≤0.04  | ≥345  | 470-630  | ≥22  | 
Outside Diameter  | Wall Thickness  | ||
DN  | Inch  | mm  | mm  | 
15  | 1/2"  | 20~21.3  | 0.95~2.77  | 
20  | 3/4"  | 25~26.9  | 1.1~2.87  | 
25  | 1"  | 32~33.7  | 1.1~4.0  | 
32  | 1 1/4"  | 40~42.4  | 1.1~4.0  | 
40  | 1 1/2"  | 47~48.3  | 1.5~7.0  | 
50  | 2"  | 58~60.3  | 1.8~7.0  | 
65  | 2 1/2"  | 73~76.1  | 2.0~7.0  | 
80  | 3"  | 87~88.9  | 2.2~8.0  | 
90  | 3 1/2"  | 101.6~102.1  | 2.2~9.0  | 
100  | 4"  | 113~114.3  | 2.2~9.0  | 
125  | 5"  | 140~141.3  | 2.5~10.0  | 
150  | 6"  | 165~168.3  | 2.5~10.0  | 
200  | 8"  | 216~219.1  | 2.75~12.0  | 
250  | 10"  | 272.8~273.2  | 5.0~13.75  | 
300  | 12"  | 323.8~325  | 5.5~13.75  | 
350  | 14"  | 355.6~356  | 5.5~13.75  | 
400  | 16"  | 406~406.4  | 5.75~13.75  | 
450  | 18"  | 457~457.2  | 5.75~17.75  | 
500  | 20"  | 507.9~508.1  | 5.75~17.75  | 
600  | 24"  | 609~610  | 5.75~17.75  | 




