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新研制的低温无磁结构材料30 Mn23 Al4 Cr 5 钢,作为低温结构材料,可用于-269℃极低温;作为无磁结构材料,也可用于-269～600℃温区。该钢强度较1Cr 18 Ni 9 Ti不锈钢高,与美国名牌低温无磁钢 Nitronic 40和 Kromark-55比较,具有下列优点:低温奥氏体组织十分稳定,自室温至-269℃形变后,仍保持稳定的奥氏体组织;低温韧性较高;高温时效变脆倾向很小;比重小;收缩率小;抗大气腐蚀性能相当于 1Cr 13,远优于 9％Ni钢。该钢可用配套的焊丝进行钨极氩弧焊,焊缝
The newly developed low temperature non-magnetic structure material 30 Mn23 Al4 Cr 5 steel, as a low temperature structural material, can be used at -269 ℃ extremely low temperature; as a non-magnetic structure material can also be used -269 ~ 600 ℃ temperature zone. The strength of the steel is higher than that of 1Cr 18 Ni 9 Ti stainless steel and has the following advantages compared with the American famous brand low temperature non-magnetic Nitronic 40 and Kromark-55: the low-temperature austenite structure is very stable and remains at room temperature to -269 ° C after deformation Stable austenitic structure; high temperature toughness; high temperature aging brittle tendency is small; small proportion; small shrinkage; anti-atmospheric corrosion performance is equivalent to 1Cr13, far superior to 9% Ni steel. The steel can be used with a supporting wire TIG welding, welding