NORMA ASTM A128

Standard Specification for Steel Castings, Austenitic Manganese

6. Chemical Composition
6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1.
6.2 Contamination of the drillings by drill chips must be avoided. Flat drills of the best highspeed steels, or drills of some of the newer tool materials, will generally be satisfactory for drilling manganese steel. Manganese steel may be drilled best after it has been annealed for several hours at from 900 to 1100°F [500 to 600°C].

7. Repair by Welding
7.1 Defects shall be welded using a procedure and welders capable of producing sound welds. The weld deposit shall be austenitic steel in general, but welds on wearing surfaces shall consist of austenitic-manganese steel.
7.2 Weld repairs shall be inspected to the same quality standards as are used to inspect the castings.

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