Ontario ENGINEERING STANDARD SPECIFICATION 1/8 REV. SPECIALTY ENGINEERING MATERIALS ENGINEERING QA CLARABELLE MILL CAST Q & T STEEL LINERS

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1 1/8 Rev Description Approved by Reviewed by Issue Date YYYY/MM/DD 1 Document format and number changed. Previous number QA PB 011/1/4 PB 011/1/4 01/04/19 SPEC Reviewed 016 Regional Approvals removed, no other changes P.Belzile A.Nadeau 016/1/15

2 /8 1.0 PURPOSE This specification describes the minimum requirements for the supply of Liners for the Tipple Ore Bin at the Clarabelle Mill..0 APPLICATION This specification, applies at any Vale locations indicated with approval on the cover page, with the following exceptions:.1 EXCEPTIONS None. 3.0 REFERENCE DOCUMENTATION The following documents were used in the development of this document or have instructions and procedures applicable to it. They shall be used in their most recent revision. None. 4.0 DEFINITIONS Owner Supplier shall mean Vale and its authorized representatives with responsibility for the work being performed. shall mean the company, directly under contract with the Owner, which will supply the parts described in the Scope above. Manufacturer shall mean the foundry directly producing the parts. Inspector Billet shall mean an inspector retained or employed by Vale with the mandate to perform site visits and witness the fabrication and testing of the parts. shall mean the castings used as liners in the Tipple Bin.

3 3/8 4.1 CONFLICTING REQUIREMENTS In the event of conflict between this specification, the purchase order, the engineering drawings or the Manufacturer specification, the Supplier/manufacturer shall notify the Owner in writing of the basis of the conflict and justification for any deviations from this specification. This shall not delay in any way the delivery date agreed. This specification is provided to supplement the Manufacturer s own internal fabrication and design specifications. If the Manufacturer s specifications are more stringent and/or more complete for any of the sections of the present document or if any of the requirements of the present document are judged to be detrimental to the performance of the part, the Manufacturer shall notify the Owner, in writing, as to which sections of the present document should not be used and the technical/economical advantage of using the Manufacturer s specifications instead. 5.0 GENERAL REQUIREMENTS 5.1 SUPPLIER S REQUIREMENTS It is the responsibility of the Supplier to ensure that the requirements of this specification and of its own specifications are met and to perform all inspections necessary to ensure compliance prior to the inspections by the Owner. In addition to the Supplier s inspections, the Owner or its Inspector may perform any inspections necessary to verify compliance with this specification. Inspection may include any and all work, equipment, inspection equipment, materials, procedures and may be conducted at any time the Owner chooses. The Manufacturer shall provide accessibility to all fabrication and inspection work. The Manufacturer shall prepare an inspection and test plan (ITP) for the manufacture of the billet. This shall be submitted to the Owner prior to commencement of fabrication. The Owner reserves the right to insert Review, Witness and Hold points at critical steps of the manufacture. 5. CODES, STANDARDS AND REGULATIONS Supply shall be performed in accordance with the following standards:

4 4/8 5.3 PERSONNEL QUALIFICATIONS Non-destructive Evaluation (NDE) personnel performing the evaluation shall be certified in the appropriate method. Standard Specification for Steel Castings, High ASTM A Strength, for structural purposes Standard Specification for Castings, Steel and Alloy, ASTM A Common requirements, for general industrial use. Standard guide for magnetic particles testing ASTM E Standard practice for magnetic particle testing ASTM E QUALITY ASSURANCE 6.1 MATERIALS Cast steel quenched and tempered to 500 Bhn and of sufficient toughness to resist the heavy impact loads in an ore bin/chute. A complete chemical analysis of each heat produced shall be supplied for review. 6. HEAT TREATMENT AND STRESS RELIEVING The billets shall be quenched and tempered to achieve the required mechanical properties. Supplier shall provide copies of heat treatment reports and furnace chart recordings. As an alternative to heat treatment reports and furnace chart recordings, the Supplier may elect to perform Hardness testing on 100% of the pieces produced. 6.3 MECHANICAL PROPERTIES The mechanical properties of the billets shall meet the following requirements: Surface Hardness: Bhn Core Hardness: Bhn Impact Toughness/Charpy: 10 ft-lb (min.) tested at 5 deg C The surface hardness shall be tested and reported for a representative sample of each type of billet produced. The sample shall include a quarter (5%) of each type of billet produced. The destructive tests required to check the core hardness and impact toughness of the castings shall be done on an additional test billet or from a test block per ASTM A781 S15.

5 5/8 One (1) test block or test billet shall be cast. The test block or test billet shall be heat treated in production furnaces with the castings or to the same procedure as the billets it represents The destructive mechanical tests required are the following: The Core Hardness shall be verified by sectioning the test billet or test block and taking reading as close as possible to the centre. A minimum of 6 readings is required. Three (3) Charpy specimens shall be machined off the surface (within 1/8 of the surface) of the test billet or test block and tested at 5 shall meet a minimum of 10 ft-lb and no single reading shall be less than 8 ft-lb. Three (3) specimens shall be machined off the core of the test billet or test block. And tested at 5 deg C. The average toughness shall meet a minimum of 10 ft-lb and no single reading shall be less than 8 ft-lb. 6.4 MICROSTRUCTURE The microstructure of the billets shall be 100% tempered martensite throughout the thickness. One sample taken from the surface of the test billet or test block shall be mounted, polished, etched for metallography. One sample taken from the core of the test billet or test block shall be mounted, polished, etched for metallography. 6.5 DIMENSIONAL The billet dimensions shall meet the requirements and tolerances specified on the engineering drawings. The bolt pattern shall be checked on each pieces with a go-no go gauge to ensure compliance with the tolerances of the engineering drawings.

6 6/8 6.6 NON-DESTRUCTIVE TESTING Each billet produced shall be submitted to the following inspection after final heat treatment: 100% visual inspection. No Cracks are allowed. No rounded indications greater than 0% of the thickness. A representative sample of no less than 50% of each type of billet produced shall be submitted to the following inspection after final heat treatment: 100% magnetic particles inspection (yoke method only). No Cracks are allowed. No rounded indications greater than 0% of the thickness. In addition, all castings shall be free from adhering sand, scale, cold shuts, cracks and hot tears. 6.7 DEFECTS/REPAIRS When defects, which would prevent the piece from meeting the Owner s requirements, are found, a non-conformance report shall be issued. In the case of cracks, the following applies: Cracks less than ½ depth = Blend grind Cracks between ½ to 1 depth = Weld repair Cracks more than 1 depth = scrap piece If it is decided to recover the piece by welding, a written repair procedure shall be submitted to the Owner by the Supplier for approval. No repairs should be done on any castings without the prior written consent of the Owner. 7.0 DOCUMENTATION The following documentation shall be provided: 7.1 PRIOR TO THE START OF CASTING: Supplier s Specifications

7 7/8 Inspection and Test Plan 7. PRIOR TO DELIVERY Final inspection report including, but not limited to: Chemical analysis test report. Microstructure test report. Mechanical properties test reports. Non-destructive test reports. Dimensional inspection records. Heat treatment reports and furnace chart recordings. Non-conformance reports. Final QA document package. The final inspection report shall be supplied as one hard copy and one electronic copy in Acrobat format 8.0 APPENDICES Appendix A: Revision and Transition Notes Appendix B: Keywords

8 8/8 Appendix A: Revision and Transition Notes (Revisions are listed in reverse chronological order with most recent revision at the top. Revision notes describe: what was changed, why it was changed, and the plan to implement the change, including whether changes are retroactive) Revision SPEC Reviewed 016 Regional Approvals removed, no other changes Revision 1 Document format and number changed due to Vale Engineering Document Program changes in 011. Previous Standard number was QA-016 Rev 00. QA-016 Appendix B: Keywords