921A ship plate、907A steel

907A and 921A ship steel are different from ah32. 
The purpose of warship manufacturing is different from that of civil ship manufacturing, so the performance of steel 10CrNi3MoV is also very different.
 Warships may be attacked by shells and torpedoes, so the strength and crack resistance sensitivity should be considered when using steel. 
If it is used for aircraft carrier deck, the high temperature resistance and the width of steel plate should also be considered. 
Civil vessels are only used to transport personnel and goods, considering safety, comfort, stability, load, economy and other factors. 
The steel used is generally required to meet the requirements of several major classification societies.

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Grade 10CrNiCu, code l907a, steel plate thickness range: 3-32mm.
Die casting, mostly used for shipbuilding ball flat steel and angle steel. 
907A also distinguishes between - I and - II.
Generally, the delivery is mainly high-temperature tempering, which can also be adjusted to treatment.