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Since most customers order castings to a
certain material grade and/or specification,
they expect that the castings which they
receive comply with the properties (both
chemical and mechanical) called out in those
grades/ specifications. "Physical" testing
is performed by Southwest Steel as a means
of demonstrating/verifying conformance to
the required mechanical properties.
Typical physical tests performed include
tensile testing (from this test we determine
the mechanical properties of Tensile, Yield,
Elongation and Reduction of Area), and Charpy
V-Notch impact testing, (which determines
the impact properties of the steel).
Physical testing is performed on test bars
cut from a standard keel block (per ASTM
A370), which have been poured on the same
heat of steel as the castings it represents,
and are heat treated per specification.
Unless otherwise advised by the customer,
Southwest Steel test bars for tensile testing
are machined to a 0.505" diameter, and pulled
on a Satec 60 BTE Tensile Tester.
If a customer requires Charpy impact testing,
it will be performed on a set of three specimens
machined from test bars to 0.394" and break
them on the Satec Charpy Impact Tester.
Physical Testing
Instruments:
Charpy Impact Tester
Machine Type: Satec Systems
Serial Number: 1265
Calibration: Calibrated annually to NIST
standards.
Satec/Strainsense Tensile Tester
Machine Type: Strainsense
Model: 60BTE
Readout: Satec Systems/Baldwin RZOL XCX
digital display & data
storage.
Calibration: Calibrated annually to ASTM
E4, ISO-100012-1,
ANSI/NCSL-Z540-1 (incorporating MIL-STD-45662A requirements)
and ISO/IEC Guide 25
Brinell Hardness Testing
Machine Type: Service Physical
Machine Type: Tinius Olsen
Machine Type: King Portable Testers
Calibration: Calibrated quarterly per
our ISO procedures traceable to
ASTM E10 and NIST
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