SIS SS-EN 28 891-1992
贵金属含量高达25 %以上 ,但不包括75 %的牙科铸造合金(ISO8891-1990)

Dental casting alloys with noble metal content of 25 % up to but not including 75 % (ISO 8891:1990)


 

 

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标准号
SIS SS-EN 28 891-1992
发布
1991年
发布单位
SE-SIS
 
 
适用范围
This International Standard gives the classification of, and specifies requirements and test methods for, dental casting alloys with a noble metal content of 25 % up to but not in-cluding 75 %. It applies to casting alloys intended for making dental restorations and appliances. It does not apply to alloys intended for use as the substructure of a ceramic-to-metal restoration. For dental casting alloys with a noble metal content of 75 % and above, see ISO 15621'.

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