EN 10219 S355JRH Structural Steel Pipe

Need a structural steel pipe with 355 MPa yield strength + room temperature impact toughness + good weldability? EN 10219 S355JRH - Europe's most versatile cold-formed hollow section.

EN 10219 S355JRH refers to cold-formed welded hollow structural sections (HSS) manufactured according to the European standard EN 10219, with a material grade of S355JRH. S355JRH is an upgraded version of S235JRH, offering higher strength while maintaining good weldability, making it suitable for engineering scenarios with higher requirements for load-bearing capacity and safety.

What is EN 10219?

EN 10219 is the European Union's technical specification for cold-formed welded hollow profiles of non-alloy and fine-grained structural steel (including round tubes CHS, square tubes SHS, and rectangular tubes RHS).

The standard strictly stipulates:
● Manufacturing process
● Dimensional tolerance (see EN 10219-2 for details)
● Mechanical properties
● Chemical composition
● Surface quality

These requirements ensure high consistency and reliability of the product and are particularly suitable for projects with high structural safety requirements.

△Related standards: This standard is also used in conjunction with EN 10210 (hot finished hollow profiles) and EN 1090 (CE certification implementation standard).

Material Grade Analysis: The Meaning of S355JRH

S355JRH is a steel grade. The meaning of each letter and number is as follows:

Symbol	Meaning
S	Structural Steel
355	Represents the minimum yield strength of this steel as 355 MPa (applicable to wall thickness ≤ 16 mm).
JR	Indicates that the steel has an impact energy ≥ 27 J when subjected to impact testing at room temperature (+20°C). This demonstrates its good toughness and ability to resist impact loads.
H	Represents hollow section steel.

△ A yield strength of 355 MPa ensures that the material can withstand medium to high loads and is one of the most widely used structural steel grades in European and international engineering.

Common Specification Range: 

S355JRH steel pipes can be manufactured in circular (CHS), square (SHS), and rectangular (RHS) cross-sections.

a. Round Tube (CHS)

Parameters	Range	Common Specifications Examples
Outer Diameter	φ21.3mm - 2500mm+	φ219, φ273, φ323.9, φ355.6, φ406.4, φ508mm
Wall Thickness	2mm - 50mm	2.0, 2.6, 3.2, 4.0, 5.0, 6.3, 8.0, 10.0, 12.5, 16.0, 20.0

b. Square Tube (SHS) and Rectangular Tube (RHS)

Type	Side Length/Size Range	Wall Thickness Range
Square Tube	20×20mm - 400×400mm	1.5mm - 40mm
Rectangular Tube	50×30mm - 500×300mm	1.5mm - 40mm

△ Need specific specifications? Contact us for customized sizes and the latest quotes: info@hu-steel.com

3 Advantages of S355JRH Structural Steel Pipes:

1. High strength and reliable room temperature toughness
Strength grade: According to EN 10219 standard, S355JRH has a minimum yield strength of 355 MPa (applicable to wall thickness ≤ 16 mm), a tensile strength range of 510 – 680 MPa, and an elongation (A) ≥ 20%.

Impact Toughness: Guaranteed Charpy V-type impact energy (kV) ≥ 27 J at room temperature (+20°C), meeting the structural resistance to brittle fracture requirements under normal conditions.

Note: S355JRH does not guarantee impact performance at -20°C. If the project requires low-temperature toughness, it is recommended to use S355J2H (guaranteed impact at -20°C).

2. Excellent Welding and Cold Working Performance
Low Carbon Design: Carbon content is strictly controlled at ≤0.22%, combined with reasonable manganese and silicon content, ensuring excellent weldability. Suitable for conventional processes such as manual arc welding, gas shielded welding, and submerged arc welding, requiring no preheating or complex post-weld heat treatment, effectively preventing heat-affected zone cracking in welds.

Processing Adaptability: As a cold-formed product, the material retains good plasticity, easily undergoing secondary processing such as cutting, drilling, stamping, and cold bending, flexibly adapting to various complex design requirements.

3. High Dimensional Accuracy and Surface Quality

Precision Forming: Utilizing high-precision cold bending forming technology, ensuring regular cross-sectional shapes, sharp edges, and uniform wall thickness for square and rectangular tubes.

Strict Tolerances: Outer diameter, side length, and straightness all adhere to the strict tolerance standards of EN 10219-2, guaranteeing high interchangeability and assembly efficiency of components on-site, reducing on-site adjustments and rework.

EN 10219 S355 vs S275 vs S235:

The main performance differences between S355JRH and S275JOH, S235JRH are as follows:

Comparison Items	S235JRH	S275JOH	S355JRH
Designation Meaning	S = Structural steel, 235 = Yield strength, JR = Room temperature impact, H = Hollow profile	S = Structural steel, 275 = Yield strength, J0 = 0°C impact, H = Hollow profile	S = Structural steel, 355 = Yield strength, JR = Room temperature impact, H = Hollow profile
Minimum Yield Strength (≤16mm)	235MPa	275MPa	355MPa
Tensile Strength Range	340-470 MPa	410-560 MPa	490-630 MPa
Elongation (≥)	24%	20%	20%
Impact Toughness Temperature	+20°C	0°C	+20°C
Impact Energy Requirement	≥27J	≥27J	≥27J
Carbon Equivalent (CEV) (≤16mm)	≤0.37	≤0.41	≤0.45
Welding Performance	Excellent	Excellent	Good (Higher Carbon Equivalent)
Application	Lightweight structures, decorative pipes	General load-bearing structures	Medium to high load-bearing structures

Selection Recommendations:
● S235JRH: Lightweight structures, non-load-bearing components, price-sensitive projects
● S275JOH: General load-bearing structures, 0°C environment
● S355JRH: High load-bearing requirements, normal temperature environment, bridges/high-rise buildings

Impact Toughness Grade Comparison (JR vs J0 vs J2 vs K2):

In EN 10219 standard, for the same strength grade (e.g., S355), different grades can be selected according to impact toughness requirements:

Grade	Impact Test Temperature	Minimum Impact Energy	Application
S355JRH	+20°C	27J	Normal temperature environment, indoor structure
S355J0H	0°C	27J	Temperate regions, general outdoor applications
S355J2H	-20°C	27J	Cold regions, winter construction, Nordic market
S355K2H	-20°C	40J	Extremely cold regions, critical safety structure

△ Procurement Tips: If the project is exported to Nordic countries, Canada, or Russia, please select S355J2H or S355K2H to ensure low-temperature toughness.

International Standard Material Equivalence Comparison:

S355JRH is equivalent to the following international standards:

EU (EN): EN 10219 S355JRH
USA (ASTM): ASTM A500 Grade B / Grade C
Germany (DIN): DIN EN 10219 S355JRH
China (GB/T): GB/T 6728 / GB/T 1591 Q355B / Q355C
UK (BS): BS EN 10219 S355JRH
Japan (JIS): JIS G3466 STK490 / STKR400

Normalized Steel vs. Thermomechanically Rolled Steel vs. Ordinary Steel:

EN 10219 also includes higher performance grades:

Grade Type	Representative Grade	Characteristics	Application
Ordinary Structural Steel	S235JRH, S275J0H, S355JRH	Conventional strength, high cost-effectiveness	General building structures
Normalized/Normalized Rolled Steel (N)	S355NH, S460NH	Fine grain, excellent impact toughness	High pressure vessels, low temperature environments -5°C
Thermomechanically Rolled Steel (M)	S355MH, S460MH	High strength, good weldability	Heavy machinery, marine engineering

Normalized Steel (N) vs. Ordinary Steel (JR/J0/J2) Core Differences:
● N series requires mandatory impact testing (minimum -20°C / 40J);
● Fineer grains, superior overall mechanical properties;
● Suitable for projects with higher safety and toughness requirements.

Applications:

S355JRH, due to its higher strength, is widely used in engineering scenarios with higher requirements for load-bearing capacity and safety.

1. Building Structures: Such as bridges, supporting frames for high-rise buildings, steel structural frames, and large-span truss structures.
2. Machinery Manufacturing: Used for manufacturing heavy equipment for engineering machinery, load-bearing structural components, and crane booms.
3. Energy and Chemical Industries: Used for pipelines, pressure vessels (requires EN 1090 certification), wind turbine towers, and solar photovoltaic supports.
4. Shipbuilding and Marine Engineering: Used for ship hull structures, offshore platform components, steel pile structures, dock supports, and foundation engineering.
5. Infrastructure: Temporary supports and heavy structural frames.

Why is S355JRH widely used in these fields?

● Excellent flexural strength: Its yield strength of 355 MPa allows it to withstand higher loads;
● Good weldability: Facilitates on-site construction and joint connections;
● Reliable overall performance: A balance of strength, toughness, and workability.

Purchasing and Application Recommendations (Must Read):

1. Clarify impact temperature requirements

If your project is located in a cold region or involves winter construction, be sure to confirm whether -20°C impact toughness is required and choose S355J2H instead of S355JRH accordingly.

2. Verify material certificates

Request the supplier to provide an EN 10204 Type 3.1 material certificate during procurement, verify the chemical composition and mechanical property data, and ensure that the material meets the standard requirements.

3. On-site inspection points

Randomly sample upon arrival, measure the wall thickness and side length with calipers, and check whether they are within the standard tolerance range. For important structures, a third party can be commissioned to conduct a re-inspection.

4. Corrosion protection

As a carbon steel, S355JRH is not inherently corrosion-resistant. For use outdoors or in humid environments, hot-dip galvanizing or coating protection is required.

FAQs:

Q1: What is the difference between S355JRH and S355J2H? Which one should I choose?

A: The main difference between the two lies in the impact toughness testing temperature. S355JRH guarantees an impact energy ≥27J at room temperature (+20°C); S355J2H guarantees an impact energy ≥27J at -20°C. If your project is located in a cold region or involves winter construction, please choose S355J2H. For normal temperature environments, S355JRH is sufficient.

Q2: What is the price of S355JRH structural steel? How do you provide a quote?

A: The price depends on specifications, wall thickness, quantity, surface treatment (black skin/galvanized/painted), and delivery terms (FOB/CIF/CFR). Please provide the above information, and we will provide a quote within 2 hours. Due to fluctuations in raw material prices, the quote is valid for 7 days.

Q3: Does S355JRH structural steel pipe require anti-corrosion treatment? Can you do it?

A: S355JRH is carbon steel and is not inherently corrosion-resistant. When used outdoors or in humid environments, anti-corrosion treatment is necessary. We can provide:

● Hot-dip galvanizing (most common, salt spray test 500-1000 hours)
● Painting (color and film thickness according to customer requirements)

● Epoxy powder coating (suitable for special environments)

Q4: Can you provide an EN 10204 3.1 material certificate?

A: Yes. We provide an EN 10204 3.1 type certificate for each batch of S355JRH structural pipe, including traceable data such as furnace number, chemical composition, and mechanical properties. We can also cooperate with third-party testing (such as SGS, BV) if needed.

Q5: Are S355JRH and Q355B interchangeable?

A: Their chemical composition and strength grades are basically the same, but the impact toughness test temperatures differ. For export projects to the EU, it is recommended to purchase according to EN standards; for domestic projects, Q355B can be used as a substitute, but it is necessary to confirm that the customer accepts -6.

Q6: Which is stronger, S355JRH or ASTM A500 Gr.C?

A: Their strengths are similar (355MPa vs 345MPa). The choice depends on the target market—S355JRH is used for EU projects, and A500 Gr.C is used for North American projects.

Q7: Will the strength decrease when the wall thickness exceeds 16mm?

A: Yes. When the wall thickness of S355JRH is >16mm, the minimum yield strength drops to 345 MPa. This is a standard requirement and does not affect compliance.

Read more: S235JRH and S355J2H Structural Steel or EN 10219 vs EN 10210