BS 2HR 503:1973
螺纹垫圈(直径0.45mm-2mm)用镍铬钴钛铝耐热合金线材(镍基、Cr19.5、Co18.0、Ti2.5、Al 1.5)规范
Specification for nickel-chromium-cobalt-titanium-aluminium heat-resisting alloy wire for thread inserts (0.45 mm to 2 mm diameter) (nickel base, Cr 19.5, Co 18.0, Ti 2.5, Al 1.5)