Structures tube and others: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures. Standard:ASTM A519,DIN 1629,DIN 2391,ASTM A519,ASTM A513, BS 6323,EN 10305-1, JIS G3441
Product Details
Standard:
Mechanical Tubing: ASTM A519:ASTM A519 American Society for Testing Material
Tube for Structures:DIN 1629 :Deutsches Institut fǖr Normung
Size: OD: 10.3mm-711.2mm WT: Hot finish: 0.250″-4.00″ Cold drawn: 0.035″-0.875″ Length: Random Length,Fixed Length, SRL,DRL
Heart treatment: Annealed, Normalized,Stress relieved ,Cold
Uses: For manufacture of pipelines,vessels,equipment,pipe fittings and steel structures.
Grade:
Mechanical Tubing:1010,1020,1045,1518,4118,4130,4135,4140
Tube for Structures:St37.0, St44.0, St55, St52.0
Chemical Composition (%):
| Standard | Grade | C | Si | Mn | P | S | Cr | Ni | Cu | V |
| Q/BQB 203
DIN 1629 |
St37.0 | ≤0.17 | 0.17-0.37 | 0.35-0.65 | ≤0.025 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | – |
| St44.0 | ≤0.21 | 0.17-0.37 | 0.50-0.80 | ≤0.025 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | – | |
| St55 | 0.33-0.41 | 0.17-0.37 | 0.50-0.80 | ≤0.025 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | – | |
| St52.0 | ≤0.22 | ≤0.55 | ≤1.60 | ≤0.025 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | – | |
| CK45 | 0.42-0.50 | 0.17-0.37 | 0.50-0.80 | ≤0.025 | ≤0.020 | ≤0.25 | ≤0.25 | ≤0.25 | – |
Note: Grades other than the a.m. chart can be made available through consultations.
Mechanical Properties:
| Standard | Grade | (MPa)
Tensile strength |
Yield strength not less than | Elongation not less than | Impact test | ||
| (℃)
Temperature |
(KV/J)
Absorbed energy |
||||||
| ≤16mm | ＞16-30mm | ||||||
| Q/BQB 203
DIN 1629 |
– | – | ≤16mm | ＞16mm | – | – | – |
| St37.0 | 350-480 | 235 | 225 | 25 | – | – | |
| St44.0 | 420-550 | 275 | 265 | 21 | – | – | |
| St55 | 540-645 | 295 | 285 | 17 | – | – | |
| St52.0 | 500-650 | 355 | 345 | 21 | – | – | |
| CK45 | 590-730 | 335 | 325 | 14 | – | – | |
Process
