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电工测量仪表用的张丝,按ΓОСТ9444-60来生产,因材料不同,其标准弹性温度系数由2.5×10~(-4)到4.5×10~(-4)1/℃,但在许多情况下,在仪表制造中,对张丝提出这样的要求:在给定的温度间隔内它的标准弹性模数应具有很高的稳定度。这样,张丝的弹性温度系数就应该比在ΓОСТ 9444-60中所规定的低一个数量级。众所周知,在钟表工业中所制造的弹性元件,都是采用小的弹性温度系数的合金,其弹性温度系数不超过1×10~(-4)1/℃。如 H41XTA 和 H35XMB 就是上述性质的合金,并且
Filament used in electrical measuring instruments is produced according to ΓОСТ 9444-60, whose standard elastic temperature coefficient varies from 2.5 × 10 -4 to 4.5 × 10 -4 / 1 due to different materials. However, in many cases In the manufacture of instrumentation, a request was made to Filament that its standard modulus of elasticity should have a high degree of stability over a given temperature interval. Thus, the elastic temperature coefficient of the filaments should be an order of magnitude lower than specified in ΓОСТ 9444-60. As we all know, in the watch industry to create the elastic elements are used small temperature coefficient of elasticity of the alloy, the elastic temperature coefficient of not more than 1 × 10 -4 (1 / ℃. Such as H41XTA and H35XMB is the alloy of the above properties, and