DIN 1629 seamless steel pipes application fields are: chemical plant, vessels, pipework construction and for common mechanical engineering purposes. Normally DIN 1629 standard are manufactured with no limiting working pressure values. Working temperature is limited below 300℃.
DIN 1629 is the standard specifies the Seamless Circular Tubes of Non Alloys Steels with Special Quality Requirements.
DIN 1629 applications the overheated boilers, as minimum thickness ferrite and seamless steel pipes, and as heat exchangers via austenitic pipes.
| Size: | |
|---|---|
| Quantity: | |
DIN1629 ST37.0 DIN1629 ST44.0 DIN1629 ST52.0
| Steel grade | Upper yield stress ReH for wall thicknesses, in mm, | Tensile strangth Rm N/mm² | Elongation after fracture A5 | ||||
|---|---|---|---|---|---|---|---|
| Symbol | Material number | up to 16 | over 16 up to 40 | over 40 up to 65 | lonigtudinal | transverse | |
| St 37.0 | 1.0254 | 235 | 225 | 216 | 350²) to 480 | 25 | 23 |
| St 44.0 | 1.0256 | 275¹) | 265¹) | 255¹) | 420²) to 550 | 21 | 19 |
| St 52.0 | 1.0421 | 355 | 345 | 335 | 500²) to 650 | 21 | 19 |
| Grade | C\ max | Si \max | Mn | P\ max | S \max |
|---|---|---|---|---|---|
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
| Steel grade | BK | BKW | BKS | GBK | NBK | |||||||
| Yield strength Rm N/mm min | Elongation% min | Yield strength Rm N/mm min | Elongation % min | Yield strength Rm N/mm min | Tensile Strength ReH N/mm min | Elongation % min | Yield strength Rm N/mm min | Elongation % min | Yield strength Rm N/mm min | Tensile Strength ReH N/mm min | Tensile Strength ReH N/mm min | |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| St45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| St52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
| Steel grade | Upper yield stress ReH for wall thicknesses, in mm, | Tensile strangth Rm N/mm² | Elongation after fracture A5 | ||||
|---|---|---|---|---|---|---|---|
| Symbol | Material number | up to 16 | over 16 up to 40 | over 40 up to 65 | lonigtudinal | transverse | |
| St 37.0 | 1.0254 | 235 | 225 | 216 | 350²) to 480 | 25 | 23 |
| St 44.0 | 1.0256 | 275¹) | 265¹) | 255¹) | 420²) to 550 | 21 | 19 |
| St 52.0 | 1.0421 | 355 | 345 | 335 | 500²) to 650 | 21 | 19 |
| Grade | C\ max | Si \max | Mn | P\ max | S \max |
|---|---|---|---|---|---|
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
| Steel grade | BK | BKW | BKS | GBK | NBK | |||||||
| Yield strength Rm N/mm min | Elongation% min | Yield strength Rm N/mm min | Elongation % min | Yield strength Rm N/mm min | Tensile Strength ReH N/mm min | Elongation % min | Yield strength Rm N/mm min | Elongation % min | Yield strength Rm N/mm min | Tensile Strength ReH N/mm min | Tensile Strength ReH N/mm min | |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| St45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 255 | 21 |
| St52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
