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Thread: ASTM A36 Steel

  1. #21
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    In a broad sense A36 chem spec is about .1% higher in C and .3% higher in Mn than 1018. The range of permissible analysis is rather large for both steels. As for the chemistry of Chinese A36, etc all bets are off. Be grateful that engineers tend to design structures with good safety factors.

  2. #22
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    A36 has structural properties that it has to has.
    .
    cold rolled 1018 can crack bending it cause it was cold worked too much. sometimes annealing will improve properties before bending it. point is that both might seem similar from chemical point of view. but properties like ductility can be different.
    .
    A36 often larger pieces can have larger pieces of slag in it. so when machined you might see some minor defects. usually smaller hot and cold rolled steel would have smaller defects in it and you might never see any defects by your eyes

  3. #23
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    Quote Originally Posted by ss_user View Post
    In a broad sense A36 chem spec is about .1% higher in C and .3% higher in Mn than 1018. The range of permissible analysis is rather large for both steels. As for the chemistry of Chinese A36, etc all bets are off. Be grateful that engineers tend to design structures with good safety factors.
    Quote Originally Posted by DMF_TomB View Post
    A36 has structural properties that it has to has.
    .
    cold rolled 1018 can crack bending it cause it was cold worked too much. sometimes annealing will improve properties before bending it. point is that both might seem similar from chemical point of view. but properties like ductility can be different.
    .
    A36 often larger pieces can have larger pieces of slag in it. so when machined you might see some minor defects. usually smaller hot and cold rolled steel would have smaller defects in it and you might never see any defects by your eyes
    Maybe you two need to review post #19 yet again ?
    As well as the date of the OP.....

  4. #24
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    got to watch cold rolled 1018 thinking it is same as A36.
    .
    some steels you bend cold and maybe bend breaks right away and maybe it breaks later when under load. ductility for many parts is important so you get no sudden part failures.
    .
    its like a Grade 8 steel bolt that get bent and you bend it back straight and bolt can then fail or crack into 2 pieces often with no warning. sometimes breaking when tightened and sometimes breaking later when under load


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