Casting Specifications

Casting Specification1. Material:1.1. Steel Castings, Carbon, for General Applications2. Scope:2.1. This standard covers carbon steel castings for general applications.3. Specification Numbers:3.1. ASTM A-27 provides a cross reference of specification numbers whichdescribe equivalent materials.4. Heat Treat Requirements:4.1. All castings must be delivered in the full annealed, normalized,normalized and tempered, or quenched and tempered condition toconform with the mechanical properties. The heat treat shall beperformed after castings have been allowed to cool from the pouringtemperature to below the transformation range.5. Surface Integrity and Roughness:5.1. The surface of the casting shall be examined visually and shall be free ofadhering sand, scale, cracks, porosity, blowholes, shrinkage defects, and hot tears.5.2. No discontinuities detrimental to the structural integrity of the casting willbe accepted.5.3. Surface discontinuities must not exceed 0.060” in diameter and 0.030” indepth within 0.25” of stress risers such as holes, fillets or other changesin cross section that are structurally loaded.5.4. Surface discontinuities must not exceed 0.060” in diameter and 0.060” indepth in other areas.5.5. Internal discontinuities may take the form of solidification shrinkagecavities, gas porosity, sand inclusions, etc and shall not exceed 0.063”spherical diameter or equivalent volume.5.6. Unacceptable surface discontinuities shall be removed and their removalverified by visual examination.5.7. Unacceptable visual surface discontinuities are shown in, but not limitedto, Visual Method MSS-SP-55.6. Quality/Dimensions6.1. All castings shall be made in a workmanlike manner and shall conform tothe dimensions on the drawings.6.2. If not specified on part drawing, parts shall be received with no surfaceblemishes due to rust or shipping damage.7. Additional Inspections:7.1. When specified by purchase order or drawing, additional inspections(mag particle, X-ray, ultrasonic, dye penetrate, etc) may be required.Additional inspections shall be in accordance with ASTM A781/A781Mand it’s supplemental requirements.8. Weld Repair:8.1. Repair of defects will not be allowed in casting sections where gear teeth,threads, or holes will be formed. Weld repairs should, if possible, bemade prior to final heat treatment of the casting. All welds shall beinspected to the same quality standards as were used to inspect thecasting.8.2. Weld repairs of Class 1 material must be post-weld heat treated. Weldrepairs for Class 2 material do not require post-weld heat treatment.must be notified of repair operations in accordance with the “Request to Repair” portion of this specification.8.3. Any filler metal used in weld repair shall produce a weldment withproperties similar to the properties of the casting.8.4. Welders shall be qualified in accordance with ASTM A488/A488M.8.5. Request to Repair:8.5.1. Casting Supplier: The casting Supplier shall submit toPurchasing Department, a written request for approval to repair including the proposed repair procedure. The proposedprocedure for repair by welding shall include, as a minimum, the typeof weld metal, welding process, weld preparation, preheattemperature, minimum inter-pass temperature and post weld heattreatment. The request shall state the location and size of thedefect(s)to be repaired and the heat treated condition of the casting.8.5.2. Purchasing Department: The PurchasingDepartment shall forward the request and proposed procedure asreceived, to the Quality Department for approval or disapproval. TheQuality Department will coordinate with the Engineering Departmentas required in order to determine acceptability. Upon receipt of theapproval or disapproval of the proposed repair and procedure, thePurchasing Department shall notify the casting Supplier regarding thedisposition of the defective casting.9. Certification Requirements:9.1. Certificate of Conformance: Required for all materials purchased.Chemical analysis and/or mechanical testing with the appropriate reportsmay be required by the Quality, Engineering or Purchasing Departments,or by the customer.9.2. Chemical Analysis Report:: If stated as a requirement on the castingorder, the Supplier shall furnish a chemical analysis report for each heatof castings. If no chemical analysis report is required, the Supplier isrequired to maintain a certificate of analysis at the suppliers facility for aminimum of two years.9.3. Mechanical Properties Report: If stated as a requirement on thecasting order, the Supplier shall furnish information regarding themechanical properties for each heat of castings. If no mechanical analysis report is required, the Supplier is required to maintain a material testreport including mechanical properties for a minimum of two years.9.4. Casting Identification: When possible, the drawing and/or casting ordershall designate the type and location of the marking by the Supplier.Identification marking, as a minimum, shall include:9.4.1. Supplier identification code & Casting part number9.4.2. Heat and/or serial number10. Ordering Information:10.1. The following information, as a minimum, should be included on thecasting order:10.1.1. Part name10.1.2. Part number10.1.3. Quantity required10.1.4. Required Grade and Class10.1.5. Delivery schedule10.1.6. Title, number and date of this standard10.1.7. Test and inspection reports which are required for the particularorder11. REFERENCE SPECIFICATIONS11.1. ASTM A27 Standard Specification for Steel Castings, Carbon, forGeneral Application11.2. ASTM A370 Mechanical Testing of Steel Products11.3. ASTM A488 Standard Practice for Welding Castings11.4. ASTM A781 / 781M Specifications for Castings, Steel & Alloy, CommonRequirements for General Use。