ผลิตภัณฑ์โลหะ
เอกสารมาตรฐาน
สหรัฐอเมริกา
ASTM
A997-08(2018)
Standard Practice for Investment Castings, Surface Acceptance Standards, Visual Examination
2018
2
ASTM Vol.01.02 (2023)
This practice covers the acceptance criteria for surface inspection of investment castings by visual examination.
This practice is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M-specification designation (SI units), the inch-pound units shall apply.
The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
...