EN 10216-2 Seamless steel tubes for pressure purposes – Technical delivery conditions – part 2: Non- alloy and alloy steel tubes with specified elevated temperature
This Part of EN10216 specifies the technical delivery conditions in two categories for seamless tubes of circular cross section, with specified elevated temperature properties, made of non-alloy and alloy steel.
Steel Grade: P235GH Steel Number: 1.0345
Chemical composition (cast analysis)a, in % by mass
P max: 0.025
S max: 0.020
Al total: ≥0.020b
Cu: ≤0.30 c
a Elements not included in this Table shall not be intentionally added to the steel without the agreement of the purchaser, except for elements which may be added for finishing the cast. All appropriate measures shall be taken to prevent the addition of undesirable elements from scrap or other materials used in the steel making process.
b This requirement is not applicable provided the steel contains a sufficient amount of other nitrogen binding elements which shall be reported. When using titanium, the producer shall verify that (Al+Ti/2)≥0.020%.
c Option : In order to facilitate subsequent forming operations, an agreed maximum copper content lower than indicated and an agreed specified maximum tin content shall apply.
d The content of these elements need not to be reported unless intentionally added to the cast.
Normalizing includes normalizing forming
Temperature: 880 – 940 ℃
Cooling medium: air
Tensile properties at room and below room temperature
Upper yield strength or proof strength ReH or RP0.2 for Wall Thickness T min.
|Wall thickness mm||Mpa|
Tensile Strength, Rm, Mpa: 360 to 500
Elongation A, min. %:
Minimum average absorbed energy KV J
Minimum proof strength Rp0.2 Mpa at elevated temperature ℃（option）
Wall thickness, mm: ≤60
Tolerance on outside diameter and wall thickness
For outside diameter: ±1% or 0.5mm whichever is the greater
For wall thickness:
For outside diameter D≥355.6 mm it is permitted to exceed the upper wall thickness locally by a further 5% of the wall thickness T
Tolerance on exact lengths
|Length L||Tolerance on exact length|
|L ≤ 6000||0, +10|
|6000＜L ≤12000||0, +15|
|L>12000||0, by agreement|