Sealed iron-nickel-cobalt alloy with permanent expansion
1 Scope
This standard specifies the dimensions, shapes, technical requirements, test methods and inspection rules, as well as packaging, marking and quality certification of glass-sealed iron-nickel-cobalt alloys 4J29 and 4J44 and ceramic-sealed alloys 4J33, 4J34 and 4J46.
This standard is mainly applicable to sealed iron-nickel-cobalt alloy with permanent expansion matched with hard glass or ceramics on electrical components.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. For undated references, the latest editions apply to this part.
GB/T 14985 General rules of dimensions, shape, surface quality, testing method and inspection for expansion alloys
3 Order contents
Contracts or orders made under this standard shall cover the following contents:
a) standard No.;
b) product name;
c) grade or uniform numerical code;
d) delivery weight (or quantity);
e) dimension and shape;
f) manufacturing method;
g) delivery status and property;
h) special requirements.
4 Classification and code
Foreword i
1 Scope
2 Normative references
3 Order contents
4 Classification and code
5 Dimensions and shapes
6 Technical requirements
7 Test methods
8 Inspection rules
9 Packaging, marking and quality certification
Annex A (Informative) Typical expansion coefficient of alloy
