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About product and suppliers:
        Alibaba.com offers 1,646 aisi 4340 products. About 53% of these are steel round bars, 2% are flat steel, and 1% are stainless steel pipes. 

A wide variety of aisi 4340 options are available to you, such as aisi, astm, and jis. You can also choose from free cutting steel, mold steel, and cold heading steel. As well as from is alloy, non-alloy. And whether aisi 4340 is free samples, or paid samples. 

There are 1,646 aisi 4340 suppliers, mainly located in Asia. The top supplying country is China (Mainland), which supply 100% of aisi 4340 respectively. 

Aisi 4340 products are most popular in Southeast Asia, North America, and Mid East. 

You can ensure product safety by selecting from certified suppliers, including 551 with ISO9001, 60 with Other, and 56 with ISO14001 certification.