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ASTM A 802 Standard Practice for Steel Castings, Iron Castings, Surface Acceptance, V

The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surf

quality level required.

It should assist in avoiding misunderstanding arising from imprecise descriptions at the order stage and should also

surface that is amendable to a particular techniques of non-destructive testing. The use of the comparators is superio

on photographs which can introduce uncertainties concerning interpretation, particularly with regards o the

irregularities.

The casting designer and purchasers can denote the level one to four on the drawings as the requirements of surfa

founder, Dandong Foundry, will check the photos, and learn about the requirements. The comparator can also be used

quality inspection.

Visual Inspection Acceptance Criteria

Surface Feature Level I Level II Level III

Surface Texture A1 A2 A3

Mon-metallic Inclusions B1 B2 B4

Gas Porosity C1 C2 C3

Fusion Discontinuities - D1 D2

Expansion Discontinuities - - E3

Inserts - - F1

Metal Removal Marks (Thermal Dressing) G1 G2 G3

Metal Removal Marks (Mechanical Dressing) H1 H3 H4

Metal Removal Marks (Welds) J1 J2 J3

A. Surface Texture - the natural surface of the casting after shot blasting.

B. Non-Metallic Inclusions - Non-metallic material trapped on the surface of castings.

C. Gas Porosity - Indications of gas t the casing surface.

D. Fusion Discontinuities - surface irregularities giving a wrinkled appearance.

E. Expansion Discontinuities - slightly raised surface irregularities.

ASTM A 802 Standard Practice for Steel Castings, Iron Castings, Surfa... http://www.iron-foundry.com/ASTM-A802-steel-castings-surface-acce...

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F. Inserts - indications of chaplets (sand core supports) or internal chills.

G. Metal Removal Marks (Thermal Dressing) - surface remaining after using oxy-gas or air-carbon arc

metal removal.

H. Metal Removal Marks (Mechanical Dressing) - surface remaining after using a mechanical means of d

surface or a previously thermally dressed surface.

J. Metal Removal Marks (Welds) - indications of welds fully or partially removed by thermal or mechanical dr

Comparators for the Definition of Surface Quality of Iron and Steel Casting

SURFACE TEXTURE - A1 SURFACE TEXTURE - A2


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SURFACE TEXTURE - A3 SURFACE TEXTURE - A4


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NON-METALLIC INCLUSIONS - B1 NON-METALLIC INCLUSIONS - B


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NON-METALLIC INCLUSIONS - B3 NON-METALLIC INCLUSIONS - B


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GAS POROSITY - C1 GAS POROSITY - C2


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GAS POROSITY - C3 GAS POROSITY - C4


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FUSION DISCONTINUITIES - D1 FUSION DISCONTINUITIES - D


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FUSION DISCONTINUITIES - D5


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EXPANSION DISCONTINUITIES - E3 EXPANSION DISCONTINUITIES -


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INSERTS - F1 INSERTS - F3


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METAL REMOVAL MARKS - THERMAL DRESSING - G1 METAL REMOVAL MARKS - THERMAL DRE


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METAL REMOVAL MARKS (THERMAL DRESSING) - G3 METAL REMOVAL MARKS (THERMAL DRES


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METAL REMOVAL MARKS (MECHANICAL DRESSING) - H1 METAL REMOVAL MARKS (MECHANICAL DR


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METAL REMOVAL MARKS (MECHANICAL DRESSING) - H4 METAL REMOVAL MARKS (MECHANICAL DR


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METAL REMOVAL MARKS (WELDS) - J1 METAL REMOVAL MARKS (WELDS)


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METAL REMOVAL MARKS (WELDS) - J3 METAL REMOVAL MARKS (WELDS)

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