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EN10210-1 S275NH S355NH hot rolled seamless heavy wall hollow section steel tube
Hollow section bar
Hollow steel section
Hollow structural section
EN10210-2 Hot formmed hollow section
EN10210-1 Hot formed Hollow section
DIN EN 10210-1 Hot finished Heavy Wall Steel Tubing of non-alloy and fine grain steels
DIN EN 10210-1 Hollow section S355NH S235JRH
Hot finished structural hollow sections of non-alloy and fine grain steels
Part 1: Technical delivery conditions
Part 2: Tolerances, dimensions and sectional properties
Cold forming:
Process is done at ambient temperature
Structrual hollow section manufacturing process:
Structural hollow sections are manufactured by seamless or by welding.
Welded sections manufactured by contiuous process.
Electric welded hollow sections are supplied without trimming the internal weld bead.
Delivery conditon:
Qualities JR, J0, J2 and K2 - Hot finished
Qualities N and NL - normalized. (normalized rolled)
- for accelerated cooling +DC
- for quenching and tempering +QT
Surface conditon:
The hollow sections have a smooth surface corresponding to the manufacturing method used; bumps, cavities or shallow longitudinal grooves resulting from the manufacturing process are permissible, provided the thickness is within tolerance.
End: Square cut
TABLE 1 Permissible deviations of the product analysis from the specified limits of the cast analysis specified
| Element | Permissible maximum content in the cast analysis % by mass | Permissible deviation of the product analysis from specified limits for the cast analysis % by mass |
| C | ≤0.20 | ﹢0.02 |
| ＞0.20 | ﹢0.03 | |
| Si | ≤0.60 | ﹢0.05 |
| Mn | Non-alloy ≤1.60 | ﹢0.10 |
| Fine grain ≤1.70 | ﹣0.05 ﹢0.10 | |
| P | Non-alloy ≤0.040 | ﹢0.010 |
| Fine grain ≤0.035 | ﹢0.005 | |
| S | Non-alloy ≤0.040 | ﹢0.010 |
| Fine grain ≤0.030 | ﹢0.005 | |
| Nb | ≤0.060 | ﹢0.010 |
| V | ≤0.20 | ﹢0.02 |
| Ti | ≤0.03 | ﹢0.01 |
| Cr | ≤0.30 | ﹢0.05 |
| Ni | ≤0.80 | ﹢0.05 |
| Mo | ≤0.10 | ﹢0.03 |
| Cu | ≤0.35 | ﹢0.04 |
| 0.35＜Cu≤0.70 | ﹢0.07 | |
| N | ≤0.025 | ﹢0.002 |
| AItotal | ≥0.020 | ﹣0.005 |
a For S235JRH in thicknesses ≤16mm, the permissible deviation=0.04%C,and for thicknesses＞16mm and ≤40mm the permissible deviation=0.05%C | ||
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