We are Nningbo chenglong special steel ltd. based in Ningbo , China. We are member of Tradekey.com since August, 2011. Our business is related to Minerals & Metallurgy industry and we specifically deal in 4140,4340,34CrNiMo6,round steel bar. Please find our product details below:

4140/4340 Q+T ALLOY STEEL
Specifications1.Forged steel round bar AISI 4340 and hot rolled
2.Process:EAF+LF+VD
3.Certificate:CCS, GL, RS, BV, ISO9001
4.Dia:12mm-500mm
5.Length:3-12m

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