4J33
Category：Expansion alloy» | Date：2023-03-17
Brief introduction:
Ceramic sealing alloy.
It has a linear expansion coefficient similar to that of 95% Al2O3 ceramic in -60℃ to 600℃ temperature range.
It is mainly used for matching sealing with ceramics and is an important sealing structure material in the electric vacuum industry.
Main specifications:
Chinese grade Russia Japan 4J33 33HК(Ni33Co17) KV-4(Ni33Co17) Chemical composition under YB/T5231-2005 standard:
Grade chemical composition,% C P S Mn Si Cu Cr Mo Ni Co Fe MAX 4J33 0.05 0.02 0.02 0.5 0.3 – – – 32.1~33.6 14~15.2 Remainder Remarks：If require adjustments for some chemical compositions, pls consult with us.
Tensile strength under YB/T5231-2005 standard:
delivery condition Tensile strength of strip ,N/mm2 Tensile strength of wire ,N/mm2 Soft ＜570 ＜585 Hard ＞700 ＞860 Typical average linear expansion coefficient value α,10-6/℃
Grade 20℃~100℃ 20℃~200℃ 20℃~300℃ 20℃~400℃ 20℃~450℃ 20℃~500℃ 20℃~600℃ 20℃~700℃ 20℃~800℃ 4J33 – 7.1 6.5 6.3 – 7.1 8.5 – – Main product types:
wire,rod, bar,strip, plate/sheet,tube,ring,forging
