ASTM A997-98(2003)

Standard Practice for Investment Castings, Surface Acceptance Standards, Visual Examination

SCOPE
1.1 This practice covers the acceptance criteria for surface inspection of investment castings by visual examination.  
1.2 The values stated in SI units are to be regarded as the standard.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-2003
• ICS: 77.040.20 - Non-destructive testing of metals
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.18 - Castings

Relations

• Replaces: ASTM A997-98 - Standard Practice for Investment Castings, Surface Acceptance Standards, Visual Examination
• Effective Date: 10-Apr-2003
• Replaced By: ASTM A997-98(2003)e1 - Standard Practice for Investment Castings, Surface Acceptance Standards, Visual Examination
• Effective Date: 10-Apr-2003
• Referred By: ASTM A957/A957M-21 - Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use
• Effective Date: 10-Apr-2003
• Referred By: ASTM A732/A732M-20 - Standard Specification for Castings, Investment, Carbon and Low-Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
• Effective Date: 10-Apr-2003

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: A 997 – 98 (Reapproved 2003)
Standard Practice for
Investment Castings, Surface Acceptance Standards, Visual
Examination
This standard is issued under the fixed designation A 997; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.5 Additional acceptance criteria as applicable to all or
portions of the casting surface.
1.1 This practice covers the acceptance criteria for surface
inspection of investment castings by visual examination.
4. Acceptance Criteria
1.2 The values stated in SI units are to be regarded as the
4.1 Levels of acceptance for visual inspection are listed in
standard.
Table 1.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
A,B
responsibility of the user of this standard to establish appro- TABLE 1 Visual Inspection Acceptance Criteria
priate safety and health practices and determine the applica-
Surface Feature Level II Level III Level IV
bility of regulatory limitations prior to use.
C,D,E
Surface Pits 0.030 in. (0.76 0.060 in. (1.52 0.060 in. (1.52
mm) diameter by mm) diameter by mm) diameter by
2. Terminology 0.015 in. (0.38 0.030 in. (0.76 0.030 in. (0.76
mm) deep with no mm) deep with no mm) deep with no
2.1 Definitions of Terms Specific to This Standard:
more than 1 per more than 1 per more than 4 per
2 2 2 2 2 2
2.1.1 linear discontinuity, n—a discontinuity whose length in. (645 mm ) in. (645 mm ) in. (6445 mm )
is equal to or greater than three times its width. Cracks and cold
D,E
Positive Metal 0.060 in. (1.52 0.125 in. (3.18 0.125 in. (3.18
shuts are examples of linear discontinuity.
mm) diameter by mm) diameter by mm) diameter by
2.1.2 positive metal, n—raised metal on the casting surface 0.015 in. (0.38 0.030 in. (0.76 0.030 in. (0.76
mm) high with no mm) high with no mm) high with no
usually associated with the breakdown of the mold and its
more than 1 per more than 1 per more than 4 per
replacement with the casting metal. 2 2 2 2 2 2
in. (645 mm ) in. (645 mm ) in. (645 mm )
2.1.3 surface pit, n—a non linear depression in the cast
Parting Line and 0.005 in. 0.010 in. 0.020 in.
surface whose length is less than three times its width. Surface
Ejector Pin Marks (0.13 mm) (0.25 mm) (0.51 mm)
pits may be the result of gas or non metallic inclusions.
Height
2.1.4 surface roughness, n—a measure of surface texture
F
Gate Height 0.015 in. 0.030 in. 0.45 in.
usually determined by the use of a comparator.
(0.38 mm) (0.76 mm) (1.14 mm)
3. Ordering Information
Surface 100 µin. (2.5 µm) 125 µin. (3.2 µm) 200 µin. (5.0 µm)
E
Roughness
3.1 The inquiry or order should specify the following
A
Features in excess of those specified in the table are not accep
...