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Heat resistant pressure-vessel steel tubes

P235GH. P265GH. P295GH. P355GH. 16Mo3. 13CrMo4-5:

 

Heat-resistant pressure-vessel steels:These steel grades are characterised by a minimum yield strength of 235 - 355 MPa and by good weld ability. These grades are used above all for manufacturing boilers, pressure vessels and pipes transporting hot liquids. The user of these steel grades must make sure that his calculation, design and processing methods are appropriate for the material. The grades of this series offer good cold and hot-forming properties.Chemical composition;in percent by weight [%](Heat analysis)

 

Grade C Si Mn S N Altotal Cu1) Cr Ni Mo
    max.   max. max. min. max.      
P235GH max.0,16 0,35 0,602)-1,20 0,015 0,0123) ≥0,020 0,30 max.0,30    
P265GH max.0,20 0,40 0,802)-1,40 0,015 0,0123) ≥0,020 0,30 max.0,30    
P295GH 0,08-0,20 0,40 0,902)-1,50 0,015 0,0123) ≥0,020 0,30 max.0,30    
P355GH 0,10-0,22 0,60 1,10-1,70 0,015 0,0123) ≥0,020 0,30 max.0,30    
16Mo3 0,12-0,20 0,35 0,40-0,90 0,010 0,012 6) 0,30 max.0,30   0,25-0,35
13CrMo4-5 0,08-0,18 0,35 0,40-1,00 0,010 0,012 6) 0,30 0,704)-1,15 - 0,40-0,60

Pmax.0,025 Ni max0,30 Momax.0,08


1)AlowerCu-content and a maximum tin content maybe agreed intheorder, e.g. with respectto form ability.
2)For thicknesses < 6,0mm, aminimum content for Mn thatis 0,20% smaller than specified ispermitted.
3)Al/N≥2
4)If resistance against high-pressure hydrogen is important, aminimum percent age by mass of Cr of 0,80%
may be agreed in the order.
5)Cr+Cu+Mo+Ni≤0,70%
6)Theal-content of the melting is to determine and to indicate in the certification

 
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