The pipe is widely used in the extraction of oil, gas, water field. The end can be flat, threaded, coupling, socket connection.
ss400 is a marking method for Japanese steel materials, and is a judgment standard, which is equivalent to domestic Q235 steel (also known as A3 steel). Foreign standard structural steels are often classified according to their tensile strength, such as SS400 (as marked in Japan), where 400 means that the minimum value of σb is 400MPa, which refers to steel with σb≥1373 Mpa.
Chinese name：ss400
Foreign name：steel for general structure
Mark：Japanese steel material
Equivalent to Q235 steel
The minimum value of σb is 400MPa
SS400 is basically equivalent to my country’s Q235 (equivalent to Q235A). However, there are differences in specific indicators. Q235 has requirements for the contents of C, Si, Mn, S, P and other elements, but SS400 only requires S and P to be less than 0.050. The yield point of Q235 is greater than 235 MPa, while the yield point of SS400 is 245 MPa. SS400 (steel for general structure) means general structural steel with a tensile strength greater than 400MPa. Q235 means ordinary carbon structural steel with a yield point greater than 235MPa. The standard number of SS400 is JIS G3101. The standard number of Q235 is GB/T700
SS400 is a marking method for Japanese steel, which is actually the domestic Q235 steel. It is a kind of steel material. Q represents the yield of this material, the latter 235 refers to the yield value of this material, around 235. And as the thickness of the material increases, its yield value decreases. Due to the moderate carbon content, the overall performance is better, the strength, plasticity and welding properties are better matched, and the use is the most extensive. Often rolled into wire rod or round steel, square steel, flat steel, angle steel, I-beam steel, channel steel, window frame steel and other section steels, medium and thick steel plates. It is widely used in construction and engineering structures. It is used to make steel bars or to build factory buildings, high-voltage power transmission towers, bridges, vehicles, boilers, containers, ships, etc. It is also used as a large number of mechanical parts with low performance requirements. C and D grade steel can also be used as some professional steel.
| Q235B Steel Pipe | Q235B Steel Pipe | Q235B Steel Pipe | Q235B Steel Pipe |
| Size(MM) OD*THK | Size(MM) OD*THK | Size(MM) OD*THK | Size(MM) OD*THK |
| 22*2.5 | 89*6 | 133*7 | 245*12 |
| 25*2.5 | 89*6 | 133*7 | 273*8 |
| 25*4.5 | 89*6.5 | 133*8 | 273*10 |
| 32*3 | 89*7 | 133*9 | 273*10 |
| 42*4 | 89*7 | 133*10 | 273*12 |
| 45*3 | 89*8 | 133*10 | 273*14 |
| 45*4 | 89*10 | 140*6 | 299*8 |
| 50*4 | 89*12 | 140*8 | 299*10 |
| 50*5 | 89*13 | 146*8 | 299*12 |
| 51*4.5 | 95*4 | 159*6 | 299*16 |
| 57*3.5 | 95*5 | 159*10 | 325*8.5 |
| 57*4 | 95*5.5 | 159*12 | 325*12 |
| 57*5 | 95*8 | 168*6 | 325*14 |
| 60*3 | 102*5.5 | 168*7 | 325*16 |
| 60*3.2 | 102*6 | 168*8 | 351*9 |
| 60*5 | 102*7 | 168*8 | 351*10 |
| 63.5*5 | 102*14 | 168*10 | 351*14 |
| 65*4 | 102*16 | 168*12 | 351*14 |
| 67*5.5 | 108*4 | 180*6 | 351*16 |
| 68*3 | 108*5 | 180*8 | 356*8 |
| 70*5 | 108*7 | 180*8 | 377*14 |
| 70*7 | 108*8 | 180*10 | 402*9 |
| 73*3.5 | 108*13 | 180*12 | 402*10 |
| 73*5 | 114*4 | 180*16 | 402*12 |
| 73*6.5 | 114*5 | 194*6 | 402*14 |
| 76*3 | 114*5.5 | 194*8 | 402*16 |
| 76*3.5 | 114*6 | 194*8 | 426*12 |
| 76*4 | 114*6 | 194*10 | 426*14 |
| 76*4 | 114*6.5 | 194*12 | 426*16 |
| 76*5 | 114*7 | 203*10 | 426*18 |
| 76*6 | 114*7 | 203*12 | 426*20 |
| 83*6 | 114*8 | 219*6 | |
| 83*8 | 114*10 | 219*8 | 530*10 |
| 89*4 | 114*16 | 219*10 | 530*14 |
| 89*4.5 | 121*5 | 219*12 | 530*16 |
| 89*4.5 | 121*6 | 219*12 | 530*18 |
| 89*5 | 121*6 | 219*14 | 560*14 |
| 89*5 | 121*7 | 219*16 | 560*18 |
| 89*5 | 121*12 | 245*8 | 560*20 |
| 89*5.5 | 133*6 | 245*10 | 610*12 |
SS400 Chemical Compositions：
| C | Si | Mn | S | P |
| ≤0.17 | ≤0.50 | ≤1.40 | 0.035 | ≤0.035 |
SS400 Physical Properties:
| SS400 T.S（σb/MPa） | SS400 Y.S（σs/MPa） | SS400 Elongation（δ5/%） | SS400Akv -20度 | SS400 sample size |
| 340-470 | 235 | 24 | ≥27J | 18mm |
SS400 is often rolled into wire rod or round steel, square steel, flat steel, angle steel, I-beam, channel steel, window frame steel, etc., and medium-thick steel plate. It is widely used in construction and engineering structures. It is used to make steel bars or build factory buildings, high-voltage transmission towers, bridges, vehicles, boilers, vessels, ships, etc. It is also widely used as mechanical parts with low performance requirements; C and D steel can also be used for some professional purposes Steel applications.
