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Celsius S355NH
Specification details for Celsius S355NH

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH Key features

Key features
  • Fully normalized structural hollow sections, compliant with EN 10210:S355NH
  • Normalized fine grain steel, so free of internal stresses and with a minimum strength of 355N/mm2 allowing the highest fabrication factors and enabling material cost savings and lighter structures
  • Supplied normalized and compliant to both ‘NH’ and ‘J2H’ classifications
  • Available in a wide size range of square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm) and circular (42.4 x 3.2mm to 508 x 16mm) hollow sections
  • Tight corner radii (<2T) exceeding the standard - enhancing the product’s aesthetic appeal whilst avoiding the risk of brittle fracture which occurs in some cold formed products
  • Excellent dimensional consistency, high levels of formability, suitable for galvanising and, because the steel is fully-killed, excellent weldability
  • Fully compliant with CE marking and certified as suitable for all structural applications; overcomes design risks associated with other forms of hollow sections
  • Certified as suitable for mechanical applications, especially those involving cyclical loading
  • Suitable for low temperature applications (40J @ -20°C)
  • Batch-tested to give the properties of the specific delivered material; full test certification supplied
  • Clearly marked as Celsius® S355NH, and supplied with a 3.1 test certificate for the reassurance of batch traceability
  • Full technical support available
  • Excellent supply availability through approved stockholders

If you have any questions or for further information click here to contact us.

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH Mechanical Properties

Mechanical properties

High strength hot finished hollow sections suitable for all construction and mechanical applications. Celsius® 355 is suitable for all internal and external applications to BS5950-1:2000, EN1993 and BS5400.

Celsius® 355 hollow sections are supplied with a minimum yield strength of 355 N/mm2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S355NH.

Yield strength;ReHmin N/mm2; Tensile strength;
RmN/mm2		 Elongation % min
L0;= 5,65 √S0
specimen		 Impact strength
10mm x 10mm		 Carbon equivalent
(CEV) max
T ≤ 16mm T > 16mm 3mm < T ≤ 100mm T ºC J  
355 345 470-630 22 -20 40 0.43

Chemical composition % by mass

C max Si max Mn P max S max Nb max V ma Al total min Ti max Cr max Ni max Mo max Cu max N max
0.20 0.50 0.90
1.65		 0.035 0.030 0.050 0.12 0.020 0.03 0.30 0.50 0.10 0.35 0.020

Celsius® 355 is produced from fully-killed steel – critical to formability and weldability.

Inspection and testing
Celsius® hollow sections EN10210:S355NH are subject to specific inspection and testing and are supplied with an inspection certificate type 3.1 to EN10204.

If you have any questions or for further information click here to contact us.

EN-Construction-Product-Tubes-Celsius-Dimensional tolerancesTSUK

Dimensional tolerances

Dimensional tolerances EN10210: Part 2

Celsius tubes are manufactured to the tolerances defined in EN 10210: Part 2. Tighter tolerances are available on request and if you require specific tolerances in excess of this, please contact us.

  Circular/Ellipticals Square/Rectangular
Outside dimension
(D B and H)		 Circular ±1% with a min of ±0.5mm
and maximum of ±10mm
Ellipticals ±1% with a min of ±0.5mm
(The permitted tolerance is
twice the value for H<250)		 ±1% with a min of ±0.5mm
Thickness (T) -10%
Note: Positive deviation limited
by mass tolerance		 -10%
Note: Positive deviation limited
by mass tolerance
Squareness of side - 90 degrees ±1 degree
External corner profile - 2T max at each corner*
(EN10210 has 3T max)
Concavity/convexity (x) - – ±1% of the side, measured
independently of the tolerance
on the outside dimension
Twist (V) Ellipticals: 2mm plus 0.5mm/m max
(The permitted tolerance is
twice the value for H<250)		 2mm plus 0.5mm/m max
Section is placed on a flat surface
with one end held flat. At the other
end the height difference of 
the two lower corners is taken
Mass (M) ±6% on individual lengths ±6% on individual lengths
Straightness Maximum 0.2% of the total length and 
3mm over every 1m length
Ellipticals: The permitted tolerance is
twice the value for H<250		 Maximum 0.2% of total length
and 3mm over every 1m length
Length +150mm/-0mm +150mm/-0mm
Out-of-roundness (O) Circular 2% for hollow sections having
a diameter to thickness ratio not exceeding 100		 -

* Unless shown otherwise

EN-ConstructionEngineering-Product-Tubes-Celsius S355NH Dimensions

Dimensions

Celsius S355NH is available across the size range indicated in the tables, minimum order quantities may apply. Intermediate sizes may also be available. For further information or specific requests, please contact us.

Celsius S355NH is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes.

Circular hollow sections (CHS)      
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
42.4                    
48.3                    
60.3                    
76.1                    
88.9                    
114.3                    
139.7                    
168.3                    
193.7                    
219.1                    
244.5                    
273.0                    
323.9                    
355.6                    
406.4                    
457.0                    
508.0                    

 

Square hollow sections (SHS)      
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
40/40                    
50/50                    
60/60                    
70/70                    
80/80                    
90/90                    
100/100                    
120/120                    
140/140                    
150/150                    
160/160                    
180/180                    
200/200                    
250/250                    
300/300                    
350/350                    
400/400                    

 

Rectangular hollow sections (RHS)     
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
50/30                    
60/40                    
80/40                    
90/50                    
100/50                    
100/60                    
120/60                    
120/80                    
150/100                    
160/80                    
200/100                    
200/120                    
200/150                    
250/100                    
250/150                    
300/100                    
300/200                    
350/150                    
350/250                    
400/200                    
400/300                    
450/250                    
500/200                    
500/300                    

If you have any questions or for further information click here to contact us.

EN-Construction-Product-Celsius hot finished hollow sections - Celsius S355NH | CE marking

CE / UKCA marking

Celsius weathering grade is manufactured and CE / UKCA marked according to EN 10210-1&2:2006 grade S355NH.

All Celsius products are manufactured under Factory Production Control conditions and FPC certification is available upon request. The full Declaration of Performance for all of our Celsius range can be downloaded from our DoP download centre.

If you have any questions or for further information click here to contact us.

EN-Construction-Product-Celsius hot finished hollow sections-downloads - 355

Download

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EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Design support

Free design support

Our team of dedicated engineers are on-hand to support engineers to make the most of our range of Celsius fully normalized hollow sections.
Email us on technicalmarketing@tatasteeleurope.com or phone on +44 (0)1536 404561 to speak to the team.

We also provide a number of free tools to make your specification of Celsius hollow sections as simple as possible:

  • Celsius design app - for quick and easy sizing of hollow sections (iOS and Android)
  • The Blue Book – the definitive guide to designing across our full range, including all sectional properties
  • Welded Joints calculation software
  • Firesoft for designing concrete-filled, fire-resistant columns
  • BIM Objects – available to download from our innovative BIM DNA Profiler

If you have any questions or for further information click here to contact us.

EN-Construction-Book a CPD

Book a CPD

We offer a range of face to face and online CPDs aimed at Engineers and Architects

These free seminars can be booked at any time between 9am and 5pm. Our online webinars can all be delivered via Skype for Business and Teams, but we can consider other platforms if this will not work for your practice.

Below outline the CPDs we have available - Book yours today

  • Decarbonising your structural hollow section designs
  • Essentials of Structural Hollow Sections
  • Welded Joints in Tubular Steelwork - Eurocode 3 Part 1-8
  • Concrete Filled Hollow Sections - Composite Design – Eurocode 4
  • Composite Floor Deck in Construction
  • Structural Roof Deck in Construction
  • Specifying metal clad envelope systems in accordance with ADB2 of the building regulations and the value of large scale system testing
  • RIBA 2030 climate challenge: How steel building envelope solutions contribute
  • Pre-finished steel standing seam systems for roof & wall cladding
  • CDM regulations 2015 and their impact on steel building envelope specification.
  • Steel building envelope systems for non-domestic buildings
  • Steel for roof and wall cladding

Book your CPD today

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CPD Tata Steel