NIST 低温材料物性
按温度计算 NIST 热导率、热容、热膨胀与弹性模量，比较低温材料牌号与物性曲线，导出计算数据。
Evaluate NIST Cryogenic Materials Properties correlations for thermal conductivity, specific heat, expansion and elastic modulus. Compare material grades by temperature using the original coefficients, source ranges and reported fit errors.
NIST material properties
Source coefficient fits with temperature ranges, reported fit errors and original references.