note 1：all of the date is most values.
note 2：“—”means no request
① “W”means fitting for connecting.
② when the fitting is stick and plate, the most C should be 0.35
③ the forged fittings the most C is 0.35.and most Si is 0.35 and no limited for minimum
④ when the C is below most request, C reduce 0.01% and Mn will be increased 0.06%,until to most Mn is 1.35%
⑤ Cu,Ni Cr Mo total less than 1.00%
⑥ 0.32%。Cr Mo total less than 0.32 %
⑦ heat analysis and final products analysis will be both suitable.