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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Download Now White Paper: As a first step, I would temper this casting to drop the hardness to BHNbefore attempting annealing. Free Trade Publications, Click Here!
The castings already are distorted enough to require dimensional compromises. 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. There is no issue involved.
ASTM A532 Class III Type A 25% Cr
Please contact us at webmaster matweb. 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. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We used to stress relief anneal cylinders that we cast, we made sure to stay sub-critical.
Click Here to join Eng-Tips and talk with other members! Some of the curves in the “Abrasion Resistant Cast Iron Handbook” suggest some high chrome irons can end up with vastly different hardnesses even after tempering to the same temperature, depending on retained austenite.
High Chrome White Iron – Abrasion Resistant Cast Irons
We have approached the foundry to answer questions about softening and heat treating options. If the issue is that they take longer to machine or they go through tooling faster, can you throw more money at the machine shop to just work through it?
Questions or comments about MatWeb? Or if you don’t have an account with us yet, atsm click here aa532 register. My question is, can high chrome cast iron be “heat treated” to re-harden to HB after annealing or even tempering to ?
So now we are waiting to hear from the foundry about how to get the hardness down to awtm levels. For The shorter, simpler part we called for an as cast hardness of HB.
Hardness test shall also be made.
Abrasion resistant cast irons to ASTM A Standard
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If distortion is a possibility and it sounds like it is then re-hardening is going to be mighty risky, so I’d much prefer machining to be the last step. 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.
We are having an issue machining the parts.
ASTM A Class II Type B Chrome White Iron Data Sheet | Penticton Foundry
Property Data This page displays only the text of a material data sheet. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Combining values from the two systems may result aa532 non-conformance with the standard.
Heat treatment shall be done. The following conditions for casting will be asm Promoting, selling, recruiting, coursework and thesis posting is forbidden. Hi arunmrao, The shop has replied says they are using cubic boron nitride tooling. Students Click Here Join Us! Re-hardening is not advised as parts break easily. The Eng-Tips staff will check this out and take appropriate action.