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1、Definitions of Surface QualityA Surface Texture. Natural surface of the casting after shpt blasting (4 levels)B Non Metallic Inclusions Non metallic material trapped on the casting surface (4 levels)C Gas Porosity Indications of gas at the casting surface (4 levels)D Solidification DiscontinuitiesE
2、Sand expansion DiscontinuitiesF Metal InsertsG Metal Removal Marks Surface remaining after using oxigas or air carbon or processes for metal removal (4 levels)H Metal Removal Marks Surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface (
3、4 levels)J Metal Removal Marks Welds. Indications of welds fully or partially removed by thermal or mechanical dressing(4 levels)ASTM A802 Standard Practice for Steel Castings,Surface Acceptance Standards, Visual ExaminationVisual Criteria for GEWE Sand CastingsGEWE.all._spc_castings_supplement.GEEN
4、.00 (392A1165)Quality Level that all GEWE Casting Suppliers must delivery to GEWE facilitySurface Texture Quality Level A1Critical AreasSurface Texture Quality Level A2Critical Areas & Non Critical AreasSurface Texture Quality Level A3Non Critical AreasGas Porosity Quality Level C1Critical AreasGas
5、Porosity Quality Level C2Non Critical AreasGas Porosity Quality Level C3No acceptable Non Metallic Inclusions Quality Level B1Critical Areas & Non Critical AreasNon Metallic Inclusions Quality Level B2Non Acceptable Non Metallic Inclusions Quality Level B4Non AceptableSolidification Discontinuity Level D1Non AceptableSolidification Discontinuity Level D2Non AceptableSand Expansion Discontinuity Quality Level E3Non AceptableSand Expansion Discontinuities Quality Level E5Non AceptableMetal Inserts Quality Level F1Non AceptableMetal Inserts Quality Level F3Non Aceptable
