Modern
engineering castings are made to a Standard that defines the
quality of finish, Testing standards, dimensional tolerances,
chemical composition and other relevant factors.
Quality Castings manufactures castings
to Australian and International Standards including:
AS 4738.1-2004 Metal Castings – Ferrous Sand Moulded
ISO 4990 Steel Castings – General technical delivery requirements.
These Standards specify the general
technical delivery requirements for the supply of steel, nickel
and cobalt castings, including the requirements for the preparation
of samples and test pieces. All testing and other requirements
should be specified in accordance with designated standards
at the time of enquiry.
Many additional Standards may apply
to the manufacture of castings in various materials including
ASTM Standards, ISO Standards, European Standards etc, and Quality
Castings can consult on these requirements when necessary.
PATTERN
The shape of a casting is prescribed
by the pattern. Quality Castings can have a pattern made from
your drawings if required. Remember to check that the drawing
is the latest revision, and that the dimensions, tolerances
and machining locations are clearly indicated.
When a customer supplies the pattern,
the dimensions of the casting will be as predicated by the pattern
unless alterations are agreed. Customers should be aware that
different alloys may require different contraction allowances
in the pattern. Patterns are generally of timber construction,
however for one off or small run castings, polystyrene patterns
can be made at lower cost.
ALLOY
The customer must specify the grade
of material to be supplied. Quality Castings Metallurgists can
assist with advising a grade best suited for your application
and it is generally recommended that only established standard
grades should be specified. Factors to be considered include
strength, ductility, corrosion resistance, wear resistance,
operating temperature, etc. Quality Castings regularly produces
more than 100 grades of iron and steel, and utilises advanced
heat treatment facilities to develop the desired material properties.
SPECIFICATIONS
By their nature, all castings will
have to some degree discontinuities. Minor discontinuities will
not necessarily render a casting not fit for the purpose it
is intended and weld repair of minor discontinuities in steel
castings is long recognised as part of the normal manufacturing
process. At the time of enquiry for a casting customers should
specify any NDT requirements including the required standard
and acceptance level.
Quality Castings can advise on
various test procedures and acceptance criteria. Unless otherwise
specified, castings will be supplied in accordance with AS4738.1
Metal Castings – Ferrous sand moulded and will be supplied
to visual inspection standard MSS SP55 – Quality Standard
for Steel Castings for Valves, Flanges and Fittings and other
piping components (Visual Method).
A complete range of quality control
procedures can be employed to ensure adherence to the highest
standards and specifications. Optional testing procedures include
Certificates of Chemical Analysis, Tensile Test certificates,
Bend tests, Impact tests, Magnetic particle tests, Dye Penetrant
testing, Ultrasonic testing and Radiography. All tests are performed
to a specified standard, and NATA certification is available.
TERMS AND CONDITIONS OF SALE
Please click here for a copy of
Quality Castings Terms and Conditions of Sale
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