BS EN 10210-1 2006 Hot finished structural hollow sections of non-alloy and fine grain steels

The European Standard EN 10210-1:2006 has the status of a British Standard. This part of this European Standard specifies technical delivery conditions for hot finished hollow sections of circular, square, rectangular or elliptical forms and applies to hollow sections formed hot,

with or without subsequent heat treatment, or formed cold with subsequent heat treatment to obtain equivalent metallurgical conditions to those obtained in the hot formed product.

1. Classification and designation

⑴ Classification

①Within the strength grades of the non-alloy steels given in Annex A, four qualities JR, J0, J2 and K2 are specified. These differ in respect of specified impact requirements, method of deoxidation, limits on values of various elements, with particular reference to sulfur and phosphorus, and the inspection and testing requirements.

In accordance with the classification system in EN 10020, all steel grades in Annex A are non-alloy quality steels.

②Within the strength grades of the fine grain steels given in Annex B, two qualities N and NL are specified. These differ in respect of the carbon, sulfur and phosphorus content, and low temperature impact properties.

In accordance with the classification system in EN 10020, steel grades S275NH, S275NLH, S355NH and S355NLH are non-alloy quality steels and steel grades S420NH, S420NLH, S460NH and S460NLH are alloy special steels.

2. Designation

⑴ For non-alloy steel hollow sections the steel designation consists of:

①The number of this European Standard (EN 10210-1); the capital letter S for structural steel;

②The indication of the minimum specified yield strength for thicknesses ≤16 mm expressed in MPa1;

③The capital letters JR for the qualities with specified impact properties at room temperature;

④ The characters J0 for the qualities with specified impact properties at 0 °C and the characters J2 or K2 for the qualities with specified impact properties at -20 °C;

⑤The capital letter H to indicate hollow sections.

⑵ For fine grain steel structural hollow sections the steel designation consists of: 

① Number of this European Standard (EN 10210-1);

② Capital letter S for structural steel;

③ Indication of the minimum specified yield strength for thicknesses

≤16 mm expressed in MPA;

④ Capital letter N to indicate normalized or normalized rolled (see 6.4);

⑤ Capital letter L for the qualities with specified impact properties at –50 °C;

⑥ Capital letter H to indicate hollow sections. 

3. Chemical composition 

Annex A

(normative)

Structural hollow sections of non-alloy quality steels — Chemical composition and mechanical properties