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Q How can we reduce the variability in results from Brinell hardness testing on quench and tempered steel castings?

Publication: Modern Casting
Publication Date: 01-MAY-06 		Format: Online
Delivery: Immediate Online Access
Full Article Title: Q How can we reduce the variability in results from Brinell hardness testing on quench and tempered steel castings?(CASTING ANSWERS AND ADVICE)

Article Excerpt
The Brinell method of checking hardness is still the preferred method for steel castings and can be very accurate if performed consistently and with proper precautions. Because there are potential metallurgical and processing issues that have an effect on Brinell hardness values, metalcasting facilities must establish their Brinell process capabilities to determine if customer hardness specification ranges can be met.

For example, the range specified by the customer may be too narrow to be consistently achieved. If mechanical property requirements, such as impact properties, are part of the specification, the facility should aim to the lower end of the hardness range. If tensile tests are specified, the casting hardness range may need to be narrower to achieve the strength...

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