MIL-DTL-46177C(MR)
TABLE III.
Minimum Charpy V-notch impact resistance requirements
(at -40°F ± 2°F).
_______________________________________________________________________________
Rockwell
Brinell
Impact resistance
Hardness (HRC)
Hardness (HB)
(avg. of 2 or more tests) ft-lb,
average
3000-Kg load
standard depth specimens
average
1/2 Scale
1/4 Scale
_______________________________________________________________________________
39
362
9.0
4.5
40
371
8.5
4.3
42
390
8.0
4.0
43
400
7.5
3-8
_______________________________________________________________________________
3.2.7.3 Flatness. Unless otherwise specified in the contract or order (see 6.2),
the flatness tolerance of each plate shall be within the requirements specified in
table IV. Other tolerance requirements may be specified in the contract or order
and shall be as agreed upon between the contractor and the procuring activity.
TABLE IV.
Permissible variations for flatness.
_______________________________________________________________________________
Specified
Variations from a flat surface for specified widths, in.
thickness
Up to
60 to
72 and
inch
60 excl
72 excl
over
_______________________________________________________________________________
Up to l/4, excl
0.5
0.75
l.0
_______________________________________________________________________________
NOTE l:
Flatness tolerances for length. The longer dimensions specified is
considered the length and variations from a flat surface along the
length should not exceed the tabular amount for the specified width in
plates up to l2 ft in length, or in any l2 ft or longer plates.
NOTE 2:
Flatness tolerance for width. The flatness variation across the width
should not exceed the tabular amount for the specified width.
3.2.7.4 Waviness. Unless otherwise specified in the contract or order (see 6.2),
the waviness tolerance of each plate shall be within the requirements of table V.
3.2.8 Identification marking. Identification marking and records shall be such
as to ensure positive identification of all plates, including test samples and
specimens, with the lot and corresponding heat from which they were produced.
The key to identification symbols shall be furnished to the inspector prior to
submittal for inspection. First article and acceptance ballistic test plates
shall also be marked with the manufacturer's name or trademark, the number of
this specification, and the ordered plate thickness in inches. First article
plates shall be marked "PRE," acceptance plates "ACC" and retest plates will be
marked "R1" and "R2." If a second set of retest plates are submitted they shall
be marked "RR1" and "RR2." The marking shall be legibly stenciled or marked with
indelible ink and located along the edge with the lifting hole. The primary
plate rolling direction shall be identified.
6
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business