Grade S355J2H is a low-carbon manganese-containing steel alloy. This medium tensile carbon steel possesses both good weldable properties as well as good impact resistance. Steel grade S355J2h is also well suited to be employed in sub-zero temperature applications. There are several designations allocated under specification EN 10210. For instance, the symbol J in combination with either numerical i.e. 0 or 2, would mean that the specific impact properties of EN 10219 S355J2H Steel Pipe at specific temperature points of 0℃ and – 20℃ apiece.
The letter H is a designation intended for hollow sectioned products like the S355J2H Pipe. The other designation that touches the base with regards to its application is the letter S, which is a typical feature of structural steel. There are several reasons as to why the EN 10219 S355J2H Seamless Pipe exhibits good impact strength. Firstly, the chemistry of the carbon steel group contains manganese, which not only improves its strength but also improves the hardness properties of the S355J2H EN 10219 Pipes. Secondly, in comparison to regular pipes, hollow sections have thicker walls. A thicker cross-section also makes EN 10219 Grade S355J2H Hot Finished CHS sturdy and very durable.
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Designation for EN 10219 S355J2H Steel Grade
- The number of this European Standard (EN 10219 specification);
- The capital letter S for structural steel;
- The indication of the minimum specified yield strength for thickness ≤16mm is expressed in N/mm2;
- The capital letters JR for the qualities with specified impact properties at room temperature;
- The capital letter J and a number 0 or 2 for the qualities with specified impact properties at 0℃ and -20℃ respectively;
- The capital letter H indicates hollow sections
Dimensions and Sizes of EN10219 S355J2H Pipe
|DN||O. D.||W. T.|
Weldability of EN 10219 S355J2H Pipe
This European standard only allows for the use of weldable steel. EN 1011-1 and EN 1011-2 specify the critical parameters for the welding of the products covered by this European standard.
While welding these materials, the primary worry is the development of cold cracking in the welded zone as the product’s thickness, strength level, and CEV grows. Cold cracking happens for a variety of reasons:
- Enhanced diffusible hydrogen concentrations in the weld metal;
- Brittle structure in the heat-affected zone;
- High tensile stress concentrations in the welded joint
Chemical Composition % of Steel S355J2H (1.0576): EN 10219
|Designation||Type of deoxidation||Sub Grop||C % max. Nominal thickness(mm)||Si % max.||Mn % max.||P % max.||S % max.||N % max.|
|According to EN10219||According to EN10219||≤40||＞40≤65|
- The deoxidation methods are designated as follows:
FF-Full 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).
- QS-quality steel.
- It is permissible to exceed the specified values provided that for each increase of 0.001%N the P max content will be reduced by 0.005%, the N content of the ladle analysis, however, shall not be more than 0.012%
- The max. value for nitrogen does not apply if the chemical composition shows a minimum total Al content of0.020% 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 inspection Document.
Mechanical Properties for S355J2H Non-alloy Structural Steel
|Designation||Minimum Yield Strength REh in N/mm2||Tensile Strength Rm in N/mm2||Minimum percentage elongation L0-5,65√S0||Impact properties|
|According to EN10219||According to EN10219||Nominal thickness in mm||Nominal thickness in mm||Longitudinal||Transverse||Test Temperature||Minimum average absorbed energy(J)for standard test pieces|
|≤16||＞16≤40||＞40≤65||＜3||≥3≤65||Nominal thickness in mm|
Manufacturing Tolerances of EN 10219 S355J2H Pipe
|Characteristic||Round Hollow Sections||Square and Rectangular Hollow Sections|
|Outside Dimension||± 1% with min ± 0.5mm and max ± 10mm||± 1% with min of ± 0.5mm|
|Thickness (T)||T≤5mm: ±10%||T≤5mm: ±10%|
|T>5mm: ± 0.5mm||T>5mm: ± 0.5mm|
|Convexity||–||Max .8% with min 0.5mm|
|Squareness of side||–||90° ± 1°|
|External Corner Profile||–||T≤6mm: 1.6T to 2.4T|
|–||6<T≤10mm: 2.0T to 3.0T|
|–||T,10: 2.4T to 3.6T|
|Twist||–||2mm plus 0.5mm/m|
|Straightness||0.2% of total||0.15% of total|
|Mass||±6% on individual length|
Inspection and Testing of EN 10219 S355J2H Hollow Sections of Non-alloy Steels
EN 10219 S355J2H is tensile tested according to EN 10002-1 and Charpy impact tested according to EN 10045-1.
|Inspection Requirements||Inspection Frequency|
|Type of test||Non-specific inspection||Specific inspection|
|Mandatory tests||1||Cast analysis||One result per delivery item||One per cast|
|2||Tensile test||One result per delivery item||One per test unit ( b)|
|3||Impact test for Qualities J2 and K2 only||Not applicable||One set per test unit (b)|
|4||Surface condition and dimensions||–||–|
|5||NDT of the weld||Not applicable||All products, full length|
|Optional tests||6||Product analysis||Not applicable||One per test unit a|
|7||Cast analysis additional elements||Not applicable||See Option 1.2|
|8||Impact test for qualities JR and J0||Not applicable||One set per test unit (b)|
|b – Longitudinal or transverse samples at the discretion of the manufacturer.|
Marking of EN10219 S355J2H
Except as provided for in 10.2 for S355J2H hollow sections which are bundled, each hollow section shall be marked by suitable and durable methods such as painting, stamping, adhesive labels or attached tags with the following:
— the steel designation e.g., EN 10219-S355J2H;
— the manufacturer’s name or trademark;
— in the case of specific inspection: an identification number, e.g., order number, which permits the correlation of the product or delivery unit to the related document;
— the mark of the external inspection representative (where applicable).
If the product is supplied in bundles, the mark required in EN10219 10.1 shall be on the label, which shall be firmly attached to the bundle product.