The EN 10210 standard is a European specification that specifies the technical delivery conditions for hot-finished structural hollow sections made of non-alloy and fine grain steels. These hollow sections are primarily used in the fields of construction, civil engineering, machinery, and steel structures, and are characterized by their high strength, excellent weldability, and favorable strength-to-weight ratio.
EN 10210 consists of two main parts
EN 10210-1
Technical delivery conditions
EN 10210-2
Tolerances, dimensions, and sectional properties
This standard specifies requirements for hot-finished structural hollow sections that are formed at elevated temperatures, typically by a process such as hot forming or extrusion, and may be supplied in the as-hot-formed condition or subsequently heat-treated.
If you are working with circular, square, or rectangular hollow sections (CHS, SHS, RHS), especially in structural applications, understanding the EN 10210 standard is essential to ensure product quality, regulatory compliance, and structural performance.
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EN 10210-1 Scope of application
EN 10210-1 specifies the technical requirements for hot-finished circular, square, and rectangular structural hollow sections. It is applicable to sections produced by a hot-forming process with or without subsequent heat treatment. It specifically covers non-alloy steels and fine grain steels.
In summary, EN 10210-1 and EN 10219-1 are both harmonized standards under the Construction Products Regulation (CPR). The corresponding steel tubes are generally intended for construction purposes. The key distinction is that EN 10210-1 applies to hot-finished hollow sections, while EN 10219-1 applies to cold-formed welded hollow sections.
The EN 10210 specification outlines the technical delivery conditions for hot-finished structural hollow sections. It is critically important for structural applications such as building frameworks, bridges, and other engineering constructions, providing essential guarantees for properties like yield strength, tensile strength, and impact resistance.
The Classified Steels
The steels are classified in EN 10210 into two main categories, similar to EN 10219:
• 1. Non-alloy steels
• 2. Fine grain steels
For non-alloy steel structural hollow sections, the designation shall consist of:
• The number of this European Standard (EN 10210);
• The capital letter S for structural steel;
• The indication of the minimum specified yield strength for thickness ≤ 16 mm, expressed in N/mm²;
• The capital letter J and a number (0 or 2) for the qualities with specified impact properties at 0 °C and -20 °C, respectively;
• The capital letter H to indicate hollow sections.
For example: EN 10210 S275J0H
• EN 10210 – Number of the European Standard
• S – Structural steel
• 275 – Minimum yield strength (N/mm²) for thickness not greater than 16 mm
• J0 – Impact properties, 27 J minimum at 0 °C
• H – Hollow section
For fine grain steel structural hollow sections, the steel designation consists of:
• The number of this European Standard (EN 10210);
• The capital letter S for structural steel;
• The indication of the minimum specified yield strength for thickness ≤ 16 mm, expressed in N/mm²;
• The capital letter N to indicate normalized or normalized rolled material, or the capital letter M to indicate thermomechanically rolled material;
• The capital letter L for the qualities with specified impact properties at -50 °C;
• The capital letter H to indicate hollow sections.
For example: EN 10210 S355NH
• EN 10210 – Number of the European Standard
• S – Structural steel
• 355 – Minimum yield strength (N/mm²) for thickness not greater than 16 mm
• N – Normalized or normalized rolled fine grain steel
• H – Hollow section
*(Note: For qualities with impact properties at -50°C, 'NL' would be used, e.g., S355NLH).*
EN 10210 Requirements for chemical composition of pipes
| Chemical Composition - Cast Analysis For Product Thickness ≤ 120 mm | |||||||||
| Steel Grade | Type of Deoxidationa | % by Mass, Maximum | |||||||
| C Specified Thickness (mm) |
Si | Mn | P | S | Nb c | ||||
| Steel Name | Steel Number | ||||||||
| ≤ 40 | ＞ 40 ≤ 120 | ||||||||
| S235JRH | 1.0039 | FN | 0.17 | 0.20 | – | 1.40 | 0.040 | 0.040 | 0.009 |
| S275J0H | 1.0149 | FN | 0.20 | 0.22 | – | 1.50 | 0.035 | 0.035 | 0.009 |
| S275J2H | 1.0138 | FF | 0.20 | 0.22 | – | 1.50 | 0.030 | 0.030 | – |
| S355J0H | 1.0547 | FN | 0.22 | 0.22 | 0.55 | 1.60 | 0.035 | 0.035 | 0.009 |
| S355J2H | 1.0576 | FF | 0.22 | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | – |
| S355K2H | 1.0512 | FF | 0.22 | 0.22 | 0.55 | 1.60 | 0.030 | 0.030 | – |
| a The deoxidation methods are designated as follows: FN = Rimming steel not permitted FF = Fully killed steel containing nitrogen binding elements in amounts sufficient to bind available nitrogen (e.g. min. 0.020 % total Al, or 0.015 % soluble Al). b It is permissible to exceed the specified values provided that for each increase of 0.001 % N the P max. content is also reduced by 0.005 %. The N content of the cast analysis, however, shall not be more than 0.012 %. c The maximum value for nitrogen does not apply if the chemical composition shows a minimum total Al content of 0.020 % with a minimum Al/N ratio of 2:1, or if sufficient other N-binding elements are present. The N-binding elements shall be recorded in the Inspection Document. |
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| Chemical Composition - Cast Analyses For Product Thickness ≤ 65 mm | |||||||||||||||||
| Steel Grade | Type of Deoxidationa | Sub Groupb | % by Mass | ||||||||||||||
| Steel Name | Steel Number | C max. |
Si max. |
Mn | P max. |
S max. |
Nb max. |
V max. |
Al totalc min. |
Ti max. |
Cr max. |
Ni max. |
Mo max. |
Cud max. |
N max. |
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| S275NH | 1.0493 | GF | QS | 0.20 | 0.40 | 0.50 1.40 |
0.035 | 0.030 | 0.05 | 0.08 | 0.02 | 0.03 | 0.30 | 0.30 | 0.10 | 0.35 | 0.015 |
| S275NLH | 1.0497 | 0.030 | 0.025 | ||||||||||||||
| S355NH | 1.0539 | GF | QS | 0.20 | 0.50 | 0.90 1.65 |
0.035 | 0.030 | 0.05 | 0.12 | 0.02 | 0.03 | 0.30 | 0.50 | 0.10 | 0.35 | 0.020 |
| S355NLH | 1.0549 | 0.18 | 0.030 | 0.025 | |||||||||||||
| S420NH | 1.8750 | GF | SS | 0.22 | 0.60 | 1.00 1.70 |
0.035 | 0.030 | 0.05 | 0.20 | 0.02 | 0.03 | 0.30 | 0.80 | 0.10 | 0.70 | 0.025 |
| S420NLH | 1.8751 | 0.030 | 0.025 | ||||||||||||||
| S460NH | 1.8953 | GF | SS | 0.22 | 0.60 | 1.00 1.70 |
0.035 | 0.030 | 0.05 | 0.20 | 0.02 | 0.03 | 0.30 | 0.80 | 0.10 | 0.70 | 0.025 |
| S460NLH | 1.8956 | 0.030 | 0.025 | ||||||||||||||
| a The deoxidation method is designated as follows: GF = fully killed steel containing nitrogen binding elements in amounts sufficient to bind the available nitrogen and having a fine grain structure. b QS = quality steel. SS = special steel. c If sufficient N-binding elements are present, the minimum total Al content does not apply. d If the copper content is greater than 0.30 % then the nickel content shall be at least half of the copper content. |
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| Tolerance | ||
| OD | Circular: ±1% with a minimum of ±0.5mm | |
| and a mamximum of ±10mm | ||
| Rectangular and Square: ±1% with a minimum | ||
| of ±0.5mm | ||
| Thickness | -10% | |
EN 10210 Mechanical properties
| Mechanical Properties Of Non-Alloy Structural Steel Hollow Section | |||||||||||||||||
| Steel Grade | Minimum Yield Strength ReH MPa |
Tensile Strength Rm MPa |
Minimum Elongation Aa b % |
Minimum Impact Energy KVd J |
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| Specified Thickness mm |
Specified Thickness mm |
Specified Thickness mm |
At Test Temperature of |
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| Steel Name | Steel Number | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 120 | ≤ 3 | > 3 ≤ 100 | >100 ≤ 120 | ≤ 40 | > 40 ≤ 63 | > 63 ≤ 100 | > 100 ≤ 120 | -20℃ | 0℃ | 20℃ |
| S235JRHc | 1.0039 | 235 | 225 | 215 | 215 | 215 | 195 | 360-510 | 360-510 | 350-500 | 26 | 25 | 24 | 22 | – | – | 27 |
| S275J0Hc | 1.0149 | 275 | 265 | 255 | 245 | 235 | 225 | 430-580 | 410-560 | 400-540 | 23 | 22 | 21 | 19 | – | 27 | – |
| S275J2H | 1.0138 | 27 | – | – | |||||||||||||
| S355J0Hc | 1.0547 | 355 | 345 | 335 | 325 | 315 | 295 | 510-680 | 470-630 | 450-600 | 22 | 21 | 20 | 18 | – | 27 | – |
| S355J2H | 1.0576 | 27 | – | – | |||||||||||||
| S355K2H | 1.0512 | 40e | – | – | |||||||||||||
| a Longitudinal values. Transverse values are 2 % lower. b For thicknesses < 3 mm, see 9.2.2. c The impact properties are verified only when Option 1.3 is specified. d For impact properties for reduced section test pieces see 6.6.2. e This value corresponds to 27J at –30 °C (see EN 1993-1-1). |
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| Mechanical Properties Of Fine Grain Structural Steel Hollow Sections | |||||||||
| Steel Grade | Minimum Yield Strength ReH MPa |
Tensile Strength Rm MPa at Specified Thickness ≤ 65 mm |
Minimum Elongation A % at Specified Thickness ≤ 65 mm |
Minimum Impact Energy KVa J |
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| Steel Name | Steel Number | Specified Thickness mm |
At Test Temperature of | ||||||
| ≤ 16 | > 16 ≤ 40 | > 40 ≤ 65 | Longitudinal | Transverse | -50℃ | -20 °C | |||
| S275NH | 1.0493 | 275 | 265 | 255 | 370-510 | 24 | 22 | – | 40b |
| S275NLH | 1.0497 | 27 | – | ||||||
| S355NH | 1.0539 | 355 | 345 | 335 | 470-630 | 22 | 20 | – | 40b |
| S355NLH | 1.0549 | 27 | – | ||||||
| S420NH | 1.8750 | 420 | 400 | 390 | 520-680 | 19 | 17 | – | 40b |
| S420NLH | 1.8751 | 27 | – | ||||||
| S460NH | 1.8953 | 460 | 440 | 430 | 540-720 | 17 | 15 | – | 40b |
| S460NLH | 1.8956 | 27 | – | ||||||
| a For impact properties for reduced section test pieces, see 6.6.2. b This value corresponds to 27J at –30 °C (see EN 1993-1-1). |
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The tolerances on dimensions are established in accordance with EN 10210-2
| Tolerances on Shape, Straightness, and Mass | |||
| Characteristic | Circular hollow sections | Square and rectangular hollow sections | Elliptical hollow sections |
| Outside Dimensions (D, B, H) | ±1 % with a minimum of ± 0.5 mm | ±1 % with a minimum of ± 0.5 mm | |
| and a maximum of ± 10 mm | |||
| Thickness (T) | -10% | ||
| Out-of-roundness (O) | 2 % for hollow sections having a diameter to thickness ratio not exceeding 100 | - | |
| Concavity/Convexity (x1, x2) | - | 1% | - |
| Squareness of side (θ) | - | 90° ± 1° | - |
| External corner profile (C1, C2 or R) | - | 3 T maximum at each corner | - |
| Twist (V) | - | 2 mm plus 0.5 mm/m length | |
| Straightness (e) | 0.2 % of total length and 3 mm over any 1 m length | ||
| Mass (M) |
－6 %/+ 8 % on individual delivered lengths | ||
| Tolerances on Lengths | ||
| Type of length a | Range of length or length L | Tolerance |
| Random length | 4000 ≤ L ≤ 16000 with a range of 2000 per order item | 10 % of sections supplied may be below the minimum for the ordered range but not shorter than 75 % of the minimum range length |
| Approximate length | 4000 ≤ L ≤ 16000 | ± 500 mm b |
| Exact length | 2000 ≤ L ≤ 6000 | 0 – + 10 mm |
| 6000 < L c | 0 – + 15 mm | |
| a The manufacturer shall establish at the time of inquiry and order the type of length required and the length range or length. b Option 21 the tolerance on approximate length is 0 – + 150mm c Common lengths available are 6 m and 12 m. |
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