ASME BPVC 2023 Section VIII Div. 3

ð23
PART KM
MATERIAL REQUIREMENTS
ARTICLE KM-1
GENERAL REQUIREMENTS
KM-100 MATERIALS PERMITTED
a Materials that are to be used under the rules of this
Division, except for integral cladding, welding filler metals,
weld metal overlay, protective liner materials see
KD-103, laminate materials used for the wrapping of
CRPV vessels see Article KM-5, and inner layers of covers
used on impulsively loaded vessels see Article KM-7,
shall conform to a material specification given in Section
II, and shall be listed in Tables KM-400-1 through
KM-400-4 Tables KM-400-1M through KM-400-4M
The term material specification used in this Division shall
be the referenced specification in Section II together with
the supplemental requirements listed in the Users Design
Specification see KG-311.7.
b Materials that are outside the limits of size and/or
thickness stipulated in the title or scope clause of the material
specifications given in Section II and permitted by
Part KM may be used if the materials are in compliance
with the other requirements of the material specification
and no size or thickness limitation is specified in this Division.
In those specifications in which chemical composition
or mechanical properties vary with size or thickness,
materials outside the range shall be required to conform
to the composition and mechanical properties shown for
the nearest specified range.
c Except as provided in Articles KM-5, KM-7, and this
paragraph, materials other than those allowed by this Division
shall not be used for construction of the pressureretaining
component, including bolting and prestressed
inner layer.
1 Data on other materials may be submitted to and
approved by the ASME Boiler and Pressure Vessel Committee
in accordance with Section II, Part D, Mandatory
Appendix 5.
2 A vessel or part Manufacturer may certify materials
identified with a specification not permitted by this Division,
provided the following requirements are satisfied:
-a All requirements including, but not limited
to, melting method, melting practice, deoxidation, quality,
and heat treatment of a specification permitted by this
Division to which the material is to be certified, including
the requirements of this Division, have been demonstrated
to have been met.
-b A certification that the material was manufactured
and tested in accordance with the requirements of