After cryogenic temperature treatment, the magnetic temperature compensation ability of 1J30 decreased. It was found that part of austenite in 1J30 was transformed to martensite. Adjusting the content of Ni and adding Cr, the new magnetic temperature compensation alloy 1J30M was found. 1J30M had both high magnetic temperature compensation property of 1J30 and cryogenic temperature property of 1J32.