T9074-AS-GIB-010/271 Rev 1
3.5 PENETRAMETERS. Penetrameters shall be employed for all radiographs, except as specified in 3.5.5.4, and the penetrameter image will be employed to determine the radiographic quality level. Either MIL-type penetrameters (as defined in the following paragraphs), or ASTM-type penetrameters (as defined in ASTM E1025) may be used. None of the requirements of this document that apply to physical size, marking, etc. of penetrameters shall be interpreted as applying to ASTM-type penetrameters. The film density of the penetrameter image shall not be greater than 15 percent more than the film density of the area of interest. It may be less dense than the film density of the area of interest. The film density of the penetrameter shall be measured directly over the penetrameter hole used to obtain the required sensitivity. 3.5.1 Penetrameter Material. Material grouping for penetrameter material shall be as shown below. Penetrameters shall be of the same group number as the base material of the item being radiographed. Penetrameters of a lower group number (Group 03 is lowest) may be used for any material group of a higher number provided the applicable quality level is maintained. For material not listed, the penetrameter material shall be as specified in 3.5.1.2. Material, Group 03 Penetrameters, Group 03 Magnesium Magnesium
Material, Group 02
Penetrameters, Group 02
Aluminum
Aluminum
Material, Group 01
Penetrameters, Group 01
Titanium
Titanium
Material, Group 1
Penetrameters, Group 1
Carbon steel
Alloy steel Stainless steel Manganese-nickel-aluminum bronze
Penetrameters made of any of these materials may be used interchangeably.
Material, Group 2 Aluminum bronze
Penetrameters, Group 2
Penetrameters made of any of these materials may be used interchangeably.
Nickel-aluminum-bronze
Material, Group 3
Penetrameters, Group 3 Nickel-chromium-iron alloy
Nickel-chromium-iron alloy
Material, Group 4 Nickel-copper alloys Copper-nickel alloys
Penetrameters, Group 4
Penetrameters made of any of these materials may be used interchangeably.
Material, Group 5
Penetrameters, Group 5
Tin bronze
Penetrameters made of any of these materials may be used interchangeably.
Gun metals Valve bronze
3-7
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