Hollow Sections

We offer the best product range of Fine Grain Steels Cold Formed Welded Structural Hollow Sections.

Fine Grain Steels Cold Formed Welded Structural Hollow Sections

We bring to afore, the Fine Grain Steels Cold Formed Welded Structural Hollow Sections that is compliant with the highest standards of quality, resistivity, strength and durability. Also, these Hollow Sections are scrutinized unerringly to ensure peerless performance to the clients. Place order with us; medium, bulk or bespoke & fetch lucrative deals. Also, we ensure timely global deliveries.

Details :

Place of Origin - China
Brand Name - Torich
Certification - ISO 9001 -2008 , TS16949
Model Number - EN10219-2
Minimum Order Quantity - 5MT
Price - USD600-1100per ton
Packaging Details - Anti-Rust Protection In bundles with seaworthly packing
Delivery Time - 3040days Payment Terms - L/C, T/T
Supply Ability - 6000MT/Month
EN10219-1 EN10219-2 Cold Formed Welded Structural Hollow Sections of Non-Alloy and Fine Grain Steels
Part 1 - Technical delivery condition
Part 2 - Tolerances, Dimensions and Sectional Properties
Structural hollow section manufacturing process - Structural hollow sections are manufactured by electric weding or submerged arc welding without subsequent heat treatment. Hollow sections manufactured by a continuous process shall not inlude the welds used to join the lengths of strip prior to formning the hollow section, except that for hlically welded submerged arc-welded (SAW) hollow sections, such welds shall be permitted when tested in accordance with 9.4.3.0 EN10219-1, EN10291-2.
Delivery conditions - The hollow sections are delivered cold formed without subsequent heat treatment except that weld seam maybe in the as welded or heat treated condition
Note - For SAW hollow sections above 508 mm outside diameter it may be necessary to perform a warm shaping operation, which does not affect the mechanical properties, in order to meet the out-of-roundness tolerance requirements.
Suitability for hot dip galvaninzation: The products are sutibale for hot dip galvanization.

Products forms :

CFCHS = cold formed circular hollow section
CFRHS = cold formed square or rectangular hollow section

Charecteristics :

Tolerances on dimensions and shapes
Elongation
Tensile strength
Yield strength
Impact strength
Weldability (chemical composition)

Normative references :

EN287-1, Qualification test of welders - Fusion welding - Part 1 - Steels
EN10020-1, Metallic materials - Tensile testing - Part 1 - Method of test at ambient temperature
EN10020 -2000, Definition and classification of grades of steel
EN10021 -1983, General technical delivery requirements for steel and iron products
EN10027-1, Designation systems for steels - Part 1 - Steel names
EN10027-2, Designation systems for steels - Part 2 - Numericl systems
EN10045-1, Metallic materials - Charpy impact test - Part 1 - Test method
EN10052 -1993, Vocabulary of heat treatment terms for ferrous products
EN10168, Steel products - Inspection documents - List of information and description
EN10204, Metallic products - Types of inspection and description
EN10219-2 -2006, Cold formed welded structural hollow sections of non-alloy and fine grains steels - Part 2 - Tolerances, dimensions and sectional properties
EN10246-3, Non-destructive testing of steel tubes - Part 3 - Automatic eddy current testing of seamless and welded ( except submerged arc welded ) steel tubes for the detection of imperfections.
EN10246-5, Non-destructive testing of steel tubes - Part 5 - Automatic full peripheral magnetic transducer/flux leakage testing of seamless and welded ( except submerged arc welded) ferromagnetic steel tubes for the detection of longitudinal imperfections
EN10246-8, Non-destructive testing of steel tubes - Part 8 - Automatic ultrasonic testing of the weld seam of electric welded steel tubes for the detection of longitudinal imperfections
EN10246-9, Non-destructive testing of steel tubes - Part 9 - Automatic ultrasonic testing of the weld seaml fo submerged arc-welded steel tubes for the detection of longitudinal and/or transverse imperfections
EN10246-10, Non-destrucitve testing of steel tubes - Part 10 - Radiographic testing of the weld seam of automatic fusion arc welded steel tubes for the detection of imperfections
EN1056, Non-destructive testing of steel tubes - Qualification and competence of level 1 and 2 non-destructive testing personnel
CR 10261, ECISS information Circular 11 - Iron and steel - Review of available methods of chemical analysis
EN10266 -2003, Steel tubes, fittings and steel structural hollow sections - Symbols and definitions of terms for use in product standards
EN ISO 377, Steel and steel products - Location and preparation of seamless and test pieces for mechanical testing (ISO 377:1997)
EN ISO 643, Steels - Micrographic determination of the apparent grain size ( ISO 643:2003)
EN ISO 2566-1, Steels - Conversion of elongation valves - Part 1 - Carbon and low alloy steels ( ISO 2566-1:1984 )
EN ISO 9001 -2000, Qualiy management systmes - Requirements ( ISO9001:2000)
EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical composition( ISO 14284:1996)
EN ISO 15607, Specification and qualification of welding procedures for metallic materials - General rules ( ISO15607:2003)
EN ISO 15609-1, Specification and qualification of welding procedures for metallic materials - Welding procedure specificaiton - Part 1 - Arc welding (ISO 15609-1:2004)
EN ISO 15614-1, Specification and qualification of welding procedures for matallic materials - Welding procedure test - Part 1 - Arc and gas welding of steels and arc welding of nickel and nickel alloys (ISO 15614-1:2004)

Detailed Product Description :

Product Name::	Welded Steel Tube	Standard::	EN10219-2
Material:	Non-Alloy, Fine Grain Steels	Shape:	Round , Rectangle , Square

TABLE 1 Tolerances

Symbol	Unit	Definition
B	mm	Nominal length of side of square hollow section.Nominal length of the shorter side of a rectangular hollow section
C1/C2	mm	Length of corner region of a square or retangular hollow section
Dmax/Dmin	mm	The maximum and minimum outside diameter of a circular hollow section measured in the same plane
H	mm	Nominal length of the longer side of a rectangular hollow section
M	Kg/m	Mass per unit length
T	mm	Nominal thickness
O	%	Out-of-roundness
T	mm	Nominal thickness
V	mm	Total measured twist

TABLE 2 Tolerances

Characteristic	Circular hollow sections	Square and rectangular hollow sections
Outside dimensions (D,B andH)	±1% with a minimum of ±0.5mm and a maximum of ±10mm	Side length (mm)	Tolerance
		H,B ï¼�100 100≤H,B≤200 H,Bï¼�200	±1% with a minimum of ±0.5mm ±0.8% ±0.6%
Thickness(T)	For D≤406.4mm: T≤5mm ±10% Tï¼�5mm ±0.50mm For Dï¼�406.4mm: ±10% with a maximum of 2mm	T≤5mm ±10% Tï¼�5mm ±0.50mm
Out-of-roundness(O)	2% for hollow sections having a diameter to thickness ratio not exceeding 100â�	——
Concavity/convexityâ�¡	——	Max. 0.8% with a minimum of 0.5mm
Squareness of side	——	90° ±1°
External corner profile	——	See table 3
Twist(V)	——	2mm plus 0.5mm/m length
Straightness	0.20% of total length	0.15% of total length
Mass(M)	±6% on individual lengths

TABLE 3 External Corner Profile

Thickness T mm	External Corner Profile C1,C2,or R1 mm
T≤6 6ï¼�T≤10 10ï¼�T	1.6T to 2.4T 2.0T to 3.0T 2.4T to 3.6T

TABLE 4 Tolerances On Length①

Type of length	Range in mm	Tolerance
Random length	4000 to 16000 with a range of 2000 per order item	10% of sections supplied may be below the minimum for the ordered range but not less than 75% of the minimum of the range
Approximate length	≥4000	ï¹¢50mm 0
Exact length	ï¼�6000 ≥6000 to ≤10000 ï¼�10000	ï¹¢5mm 0 ï¹¢15mm 0 ï¹¢5mm +1mm/m 0