DIN1629, DIN1629 ST37.0, DIN1629 ST44.0, DIN1629 ST52.0, seamless steel tubes, Seamless tube
DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.
DIN 1629 Size range (mm):
- Outer Dimensions: 6.0mm-219.0mm
- Wall Thickness: 1.0mm-30 mm
- Length: max 12000mm
Application:
- It is used for manufacturing pipeline,vessel,equipment,pipe fittings .
- These tubes are prodominantly used in construction of chemical plant, vessels, pipework and for genearl mechanical engineering purpose.
The main products of steel / steel grade:
- DIN1629 ST37.0
- DIN1629 ST44.0
- DIN1629 ST52.0
Delivery Condition:
- Heat treatment,Annealed, Normalized, Normalized and Tempered
Surface treatment:
- Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
- Painting as requested.
Chemical Compositions(%) of DIN1629
| Grade | C | Si | Mn | P | S |
| DIN1629 ST37.0 | ≤0.17 | / | / | ≤0.040 | ≤0.040 |
| DIN1629 ST44.0 | ≤0.21 | / | / | ≤0.040 | ≤0.040 |
| DIN1629 ST52.0 | ≤0.22 | ≤0.55 | ≤1.70 | ≤0.040 | ≤0.035 |
Mechanical Properties of DIN1629
| Grade | Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation (%)L | Elongation (%)T |
| DIN1629 ST37.0 | ≥235 | 350-480 | 25 | 23 |
| DIN1629 ST44.0 | ≥275 | 420-550 | 21 | 19 |
| DIN1629 ST52.0 | ≥355 | 500-650 | 21 | 19 |
Amounts by which the chemical composition in the product analysis may deviate from the limiting values applicable to the cast analysis
| Element | Amount by which the product analysis may deviate from |
| the limiting values applicable to the analysis % by mass | |
| C | +0,02 |
| P | +0,010 |
| S | +0,010 |
| N | +0,001¹) |
¹) A contant in excess of the maximum value stated is permitted if a phosphorus content less than the maximum specified by 0,005% P per 0,001% N is observed. However, the nitrogen contant shall not exceed a value of 0,012% in the cast analysis and 0,014% in the product analysis (this does not apply to the RR type of deoxidization.
