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...Nzqa expiring unit standard version page of title demonstrate knowledge welding metallurgy level credits purpose people credited with this are able to the role carbon and manganese in weldable steels effects on weldability metals classification mechanical engineering available grade achieved guidance information is for seeking international specialist qualification from institute iiw details heavy research association po box manukau city industry standards codes relevant include but not limited a as nzs structural steel structures b asme boiler pressure vessel code c iso specification procedures metallic materials general rules outcomes performance criteria outcome methods manufacture designation identified properties iron alloys explained terms their composition time temperature transformations plain assessed heat treatments weldments processes alloying elements described relation phase diagrams hanga aro rau manufacturing new zealand qualifications authority logistics workforce devel...