Comments on: Ductile Iron in ASTM A536 https://castingquality.com/casting-technology/casting-material/ductile-nodular-graphite-iron/ductile-iron-in-astm-a536.html Specialized in Sand Casting, Investment Casting and CNC Machining in China. Material cover Cast Iron, Carbon Steel, Stainless Steel and Alloy Wed, 06 Jan 2021 06:43:46 +0000 hourly 1 By: China Castings https://castingquality.com/casting-technology/casting-material/ductile-nodular-graphite-iron/ductile-iron-in-astm-a536.html/comment-page-1#comment-8717 Wed, 06 Jan 2021 06:43:46 +0000 https://castingquality.com/?p=5816#comment-8717 In reply to Jorge costa.

oil or water quench can get a high hardness at surface.

]]> By: Jorge costa https://castingquality.com/casting-technology/casting-material/ductile-nodular-graphite-iron/ductile-iron-in-astm-a536.html/comment-page-1#comment-8678 Thu, 10 Dec 2020 15:12:10 +0000 https://castingquality.com/?p=5816#comment-8678 How do you heat treat to bring the BHN higher

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