ASTM A Class II Type B high chrome white iron is used in operating environments where abrasion and impact are the wear mechanisms. ASTM A standard has issued the chemical and hardness requirements for abrasion-resistant cast iron material grades, type A, B, C, D. ASTM A – Free download as PDF File .pdf), Text File .txt) or read online for free. Nihard.
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Some of the curves in the “Abrasion Resistant Cast Iron Handbook” suggest asttm high chrome irons can end up with vastly different hardnesses even after tempering to the same temperature, depending on retained austenite.
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ASTM A532 Grade III-A as cast
You need to check on the current structure, and perhaps do some trials. Combining values from the two systems may result in non-conformance with the standard. Re-hardening is not advised as parts break easily. We are having an issue machining the parts. Converted from Brinell hardness. So now we are waiting to hear from the foundry about how to get the hardness down to machinable levels. MatWeb is intended for personal, non-commercial use. Historical Version s – view previous versions of standard.
By joining you are opting in to receive e-mail. I guess we specified the current parts to be as cast HB. The chemical composition of a class and type that is, Class I, Type A shall conform to the range of values specified for carbon, manganese, silicon, nickel, chromium, molybdenum, copper, phosphorus, and sulfur. Hardness test shall also be made.
We were casting our own and kept retained austenite very low.
Class III Type E 25% Cr Martensitic White Cast Iron
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There is no issue involved. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. And we should try to confirm the actual material. As a first step, I would temper this casting to drop the hardness to BHNbefore attempting annealing.
This abstract is a brief summary of the referenced standard. Red Flag This Post Please let us know here why this post is inappropriate. I have done slurry pump parts and grinding rolls.
A little less than 1 inch in thickness 24 mm A 1. If distortion is a possibility and it x532 like it is then re-hardening is going aastm be mighty risky, so I’d much prefer machining to be the last step. Defense manufacturing is all about project manufacturing and project accounting. We used to stress relief anneal cylinders that we cast, we made sure to stay sub-critical.
Four 16 mm holes drilled in the body about 12 inches mm from the large end with no flange.
Heat treatment shall be done. These alloys may be made by melting process and shall have microstructures that consist of carbides, martensite, bainite, austenite, and in exceptional cases, minor amounts of graphite or pearlite.
Also, if distortion is a concern, provide some supports.
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Promoting, selling, recruiting, coursework and thesis posting is forbidden. Register now while it’s still free! Hi arunmrao, attached is an image of the part in question, already cast and HRC ish, and needing machining of several features.
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Are you an Engineering professional? Students Click Here Join Us! It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. The following conditions for casting will be supplied: I foresee problems with distortion and perhaps even cracking of the finish machined parts.
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