DIN 1630 ST37.4 seamless hydraulic tubes are steel tubes produced according to German standard DIN 1630. They are mainly used for high precision, high corrosion and wear resistance.
ST37.4 boiler tubes are made of up to 0.17% carbon and 0.35% manganese. Due to the low carbon content of the tubes, they are easy to weld and have high ductility.
Usually, there is no limit on the maximum allowable working pressure of DIN 1630 ST37.4 seamless boiler tubes. The allowable working pressure shall not exceed 300°C.
Chemical Composition of DIN 1630 ST37.4 Seamless Tubes
| Steel | Chemical Composition (%) | ||||
| Grade | C | Si | Mn | P | S |
| max. | max. | max. | max. | max. | |
| ST37.4 (E235N) | 0.170 | 0.350 | 1.20 | 0.025 | 0.015 |
ST37.4 U Bend Tubes Mechanical Properties
| Steel | Tensile Strength | Upper Yield Point | Elongation at rupture |
| Grade | Rm (N/mm2) | ReH* (N/mm2) | A5 (%) |
| min. | min. | ||
| ST 37.4 (E235N) | 340 ≤ Rm ≤ 480 | 235 | 25 |
Best price of St37.4 NBK Heat Exchanger Tube and E235N St37.4 Seamless Precision Steel Tubes in Mumbai
Elevated Temperature Factor of E235N St37.4 Boiler Tubes
| °F | -40 | 248 | 302 | 347 | 392 | 482 |
| °C | -40 | 120 | 150 | 175 | 200 | 250 |
| Rating Factor | 0.90 | 1.00 | 0.89 | 0.89 | 0.83 | NA |
DIN 1630 St37.4 Hydraulic steel pipe
