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Hot Rolled Hollow Section Steel Tube , Heavy Wall Structural Square Tubing S275NH Grade

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Hot Rolled Hollow Section Steel Tube , Heavy Wall Structural Square Tubing S275NH Grade

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Brand Name :	New-Era
Model Number :	Seamless hot rolled
Certification :	ISO9001/TS16949
Price :	Negotiation
Payment Terms :	T/T, L/C
Supply Ability :	2000tons per month
Delivery Time :	20-30days

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Hot Rolled Hollow Section Steel Tube , Heavy Wall Structural Square Tubing S275NH Grade

EN10210-1 S275NH S355NH hot rolled seamless heavy wall hollow section steel tube , hollow bars

DIN EN 10210-1 Hot finished Heavy Wall Steel Tubing of non-alloy and fine grain steels
DIN EN 10210-1
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
C	＞0.20	﹢0.03
Si	≤0.60	﹢0.05
Mn	Non-alloy ≤1.60	﹢0.10
Mn	Fine grain ≤1.70	﹣0.05 ﹢0.10
P	Non-alloy ≤0.040	﹢0.010
P	Fine grain ≤0.035	﹢0.005
S	Non-alloy ≤0.040	﹢0.010
S	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
Cu	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

Normative References:
EN 287-1 , Qualification test of welders – Fusion welding – Part 1: Steels
EN 10002-1 , Metallic materials – Tensile testing – Part 1: Method of test at ambient temperature
EN 10020:2000 , Definition and classification of grades of steel
EN 10021:1993 , General technical delivery requirements for steel and iron products
EN 10027-1 , Designation systems for steels – Part 1: Steel names
EN 10027-2 , Designation systems for steels – Part 1: Numerical system
EN10045-1, Metallic materials - Charpy impact test - Part 1: Test method
EN10052, Vocabulary of heat treatment terms for ferrous products.
Hot Rolled Hollow Section Steel Tube , Heavy Wall Structural Square Tubing S275NH Grade
Bibliography,
DIN EN 10025-2, Hot rolled products of structural steels - Part 2: Technical delivery conditions
for non-alloy structrual steels
DIN EN 10025-3, Hot rolled products of structure steels - Part 3: Technical delivery conditions
for normalized/normalized rolled weldable fine grain structure steels
DIN EN 10210-2, Hot finished structural hollow sections of non-alloy and fine grain steels -
Part 2: Tolerances, dimensions and sectional properties
DIN EN 10219-1, Cold formed welded structural hollow sections of non-alloy and fine grain
steels - Part 1: Technical delivery conditions
DIN EN 10219-2, Cold formed welded structural hollow sections of non-alloy and fine grain
steels - Part 2: Tolerances, dimensional and sectional properties
Previous Edition:
DIN EN 10210: 1994-09
DIN EN 17120: 1984-06
DIN EN 17121: 1984-06
DIN EN 17123: 1986-05
DIN EN 17124: 1986-05
DIN EN 17125: 1986-05

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