EN 10219 S355J2H Square Hollow Section Specification

EN 10219 S355J2H Square Hollow Section refers to a cold-formed welded square hollow section (SHS) manufactured according to European standard EN 10219, with the material grade S355J2H. This product is suitable for engineering applications requiring high load-bearing capacity and low-temperature toughness.

EN 10219 S355J2H Square Cold Formed Hollow Section Specification

Standard: BS EN 10219 - Cold Formed Welded Structural Hollow Sections of Non-alloy and Fine Grain Steels

Grade: S355J2H

Square Hollow Section (SHS Tube) Sizes: 20*20mm-400*400mm
Wall Thickness: 0.5mm - 25mm
Length: 6000-14000 mm
Type: Welded / ERW
Dimensional Tolerances: Thickness : (All sizes +/- 10%)

Packing: In bundles, Anticorrosion heat preservation, Varnish coating, Ends can be bevelled or square cut, End Capped Certification & supplementary test, Finishing & Identity Mark.

Surface Protection: Black Square Tube (Self Coloured uncoated), Varnish/Oil Coating, Pre-Galvanized, Hot Dip Galvanized.

EN 10219 Standard Description:

EN 10219 is specifically for cold-formed welded hollow profiles. All S355J2H square, rectangular, and round hollow profiles manufactured according to this standard are welded pipes (welding processes include HFI/ERW, SAW, etc.).

If your project requires seamless pipes or hot-rolled hollow profiles, refer to EN 10210 (hot-rolled hollow profiles). It is worth noting that the S355J2H grade also exists in EN 10210, but the manufacturing process is completely different.

S355J2H Cold Formed Square Hollow Section Chemical Composition:

Cold Formed EN 10219 S355J2H Structural Square Hollow Section Mechanical Properties:

EN 10219 S355J2H - Cold Formed Square Hollow Section Sizes:

Size mm	kg/m	Size mm	kg/m
20 x 20 x 2.0	1.12	20 x 20 x 2.5	1.35
25 x 25 x 1.5	1.06	25 x 25 x 2.0	1.43
25 X 25 X 2.5	1.74	25 X 25 X 3.0	2.04
30 X 30 X 2.0	1.68	30 X 30 X 2.5	2.14
30 X 30 X 3.0	2.51	40 x 40 x 1.5	1.81
40 x 40 x 2.0	2.31	40 x 40 x 2.5	2.92
40 x 40 x 3.0	3.45	40 x 40 x 4.0	4.46
40 x 40 x 5.0	5.40	50 x 50 x 1.5	2.28
50 x 50 x 2.0	2.93	50 x 50 x 2.5	3.71
50 x 50 x 3.0	4.39	50 x 50 x 4.0	5.72
50 x 50 x 5.0	6.97	60 x 60 x 3.0	5.34
60 x 60 x 4.0	6.97	60 x 60 x 5.0	8.54
60 x 60 x 6.0	9.45	70 x 70 x 3.0	6.28
70 x 70 x 3.6	7.46	70 x 70 x 5.0	10.11
70 x 70 x 6.3	12.50	70 x 70 x 8	15.30
75 x 75 x 3.0	7.07	80 x 80 x 3.0	7.22
80 x 80 x 3.6	8.59	80 x 80 x 5.0	11.70
80 x 80 x 6.0	13.90	90 x 90 x 3.0	8.01
90 x 90 x 3.6	9.72	90 x 90 x 5.0	13.30
90 x 90 x 6.0	15.76	90 x 90 x 8.0	20.40
100 x 100 x 3.0	8.96	100 x 100 x 4.0	12.00
100 x 100 x 5.0	14.80	100 x 100 x 5.0	14.80
100 x 100 x 6.0	16.19	100 x 100 x 8.0	22.90
100 x 100 x 10	27.90	120 x 120 x 5	18.00
120 x 120 x 6.0	21.30	120 X 120 X 6.3	22.30
120 x 120 x 8.0	27.90	120 x 120 x 10	34.20
120 X 120 X 12	35.8	120 X 120 X 12.5	41.60
140 X 140 X 5.0	21.10	140 X 140 X 6.3	26.30
140 X 140 X 8	32.90	140 X 140 X 10	40.40
140 X 140 X 12.5	49.50	150 X 150 X 5.0	22.70
150 X 150 X 6.3	28.30	150 X 150 X 8.0	35.40
150 X 150 X 10	43.60	150 X 150 X 12.5	53.40
150 X 150 X 16	66.40	150 X 150 X 16	66.40
180 X 180 X 5	27.40	180 X 180 X 6.3	34.20
180 X 180 X 8	43.00	180 X 180 X 10	53.00
180 X 180 X 12.5	65.20	180 X 180 X 16	81.40
200 X 200 X 5	30.50	200 X 200 X 6	35.8
200 x 200 x 6.3	38.2	200 x 200 x 8	48.00
200 x 200 x 10	59.30	200 x 200 x 12.5	73.00
200 x 200 x 16	91.50	250 x 250 x 6.3	48.10
250 x 250 x 8	60.50	250 x 250 x 10	75.00
250 x 250 x 12.5	92.60	250 x 250 x 16	117.00
300 x 300 x 6.3	57.90	300 x 300 x 8	73.10
300 x 300 x 10	57.90	300 x 300 x 8	90.70
300 x 300 x 12.5	112.00	300 x 300 x 16	142.00
350 x 350 x 8	85.70	350 x 350 x 10	106.00
350 x 350 x 12.5	132.00	350 x 350 x 16	167.00
400 x 400 x 10	122.00	400 x 400 x 12	141.00
400 x 400 x 12.5mm	152.00	400 x 400 x 16	192

Core Advantages of S355J2H Square Tubes:

1. Excellent Low-Temperature Toughness
S355J2H guarantees an impact energy ≥ 27 J at -20°C, meeting the resistance to brittle fracture requirements for structural components in cold regions. This characteristic makes it an ideal choice for projects exported to cold regions such as Northern Europe, Canada, and Russia.

2. High Strength and Good Overall Performance
Yield Strength: 355 MPa (wall thickness ≤ 16mm), capable of withstanding medium to high loads.
Tensile Strength: 470 - 630 MPa, ensuring sufficient safety margin.
Elongation: ≥ 20%, with good plastic deformation capacity.

3. Excellent Weldability
Carbon equivalent ≤ 0.45%, suitable for the following welding processes:

Manual arc welding
Gas shielded welding
Submerged arc welding
Generally, no preheating or complex post-weld heat treatment is required.

4. High Dimensional Accuracy
Cold bending technology ensures a regular square cross-section shape, sharp edges, and uniform wall thickness, meeting the stringent tolerance requirements of EN 10219-2.

Applications:

S355J2H square hollow profiles are widely used in the following fields due to their high strength and low-temperature toughness:

● Building Structures: Bridges, high-rise building support frames, large-span trusses
● Machinery Manufacturing: Heavy equipment for construction machinery, load-bearing structural components, crane booms
● Energy and Chemical Industry: Wind turbine towers, solar photovoltaic supports, pipelines
● Shipbuilding and Marine Engineering: Ship hull structures, offshore platform components, dock supports

S355J2H vs S355JRH:

The core difference between S355J2H and S355JRH lies in their low-temperature impact toughness: S355JRH only guarantees an impact energy ≥27J at room temperature (+20°C), suitable for normal temperature environments and indoor structures; while S355J2H guarantees an impact energy ≥27J even at -20°C, exhibiting better resistance to brittle fracture, suitable for cold regions, winter construction, and export projects to Northern Europe.

Both have the same strength (yield strength of 355 MPa for wall thickness ≤16mm) and similar chemical composition (but S355J2H has stricter control over phosphorus and sulfur content), with a price difference of approximately 5-10%.

Procurement and Application Recommendations:

① Confirm Low-Temperature Toughness Requirements
If the project is located in a cold region or involves winter construction, the -20°C impact guarantee of S355J2H is a key advantage. For even lower temperatures (e.g., -50°C), consider the S355MLH grade.

② Verify Material Certificates
When purchasing, request the supplier to provide an EN 10204 Type 3.1 certificate to verify the chemical composition and mechanical property data.

③ On-Site Inspection Points
After delivery, randomly sample and measure the side length and wall thickness to check if they are within standard tolerances.

④ Corrosion Protection
S355J2H is carbon steel and is not inherently corrosion-resistant. When used outdoors or in humid environments, hot-dip galvanizing or coating protection is required.

Get A Quote for S355J2H Square Hollow Section:

To purchase EN 10219 S355J2H square hollow profiles, please provide the following information for a quick quote:

● Specifications (side length × wall thickness)
● Length requirement
● Quantity
● Delivery location
● EN 10204 Type 3.1 certificate required

For a quote on S355J2H square hollow profiles, please contact: sales@hu-steel.com

Read more: MS and GI Pipe Difference or ASTM A500 Structural Tubing