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| A STUDY ON NON-MAGNETIC AND CRYOGENIC STEEL 30Mn20A13 |
| by ZHANG Yansheng; SU Lijuan (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 28 July; 1982) |
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Cite this article:
by ZHANG Yansheng; SU Lijuan (Institute of Metal Research; Academia Sinica; Shenyang) (Manuscript received 28 July; 1982). A STUDY ON NON-MAGNETIC AND CRYOGENIC STEEL 30Mn20A13. Acta Metall Sin, 1983, 19(4): 1-141.
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Abstract A study was made of the development of a cheaper and more satisfactory non-magnetic steel 30Mn20Al3 after consideration of the stable austenitie structure for Fe-Mn-A1 series. The effects of A1 and C contents on the stability of Fe-20Mn austenite and the mechanical properties of the alloy have been investigated. Results show that an addition of A1 to Fe-Mn alloy may restrain the transformation of γ→ε and γ→ε→α', and reduce the martensitic transition temperature. The action of C on austenite stabilization may be more obvious, As compared with the wellknown austenitie stainless steel 1Cr18Ni9Ti, the steel 30Mn20A13 exhibited superior strength, plasticity, austenite stability, magnetic permeability and resistivity, as well as more satisfactory low temperature properties. Based upon the abovementioned, it is recommended that the steel 30Mn20A13 seems to be available for nonmagnetic and cryogenic uses even down to -196℃. In additional, its production costs may be reduced to such extent about 1/3 of that for 1Cr18Ni9Ti.
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Received: 18 April 1983
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