
7
Plate Material and Date of
Manufacture Data
Figure 9
General locations of code stamping for various plate models.
All plates are stamped with identifcation numbers. The numbers
are located on both ends of the plates as indicated in the sketches
below. The heat number, material and month and year of
manufacture can be determined from these numbers.
Six-Digit Codes
Five-Digit Codes
P-Prefi x Codes
Heat No. Code
(avail. from
Engineering)
Material
Year
Month
XXX X X X
Six-Digit Five-Digit or P-Prefi x
Material
0 Other (Nickel, 317
SS, 317L SS, etc.)
AISI 304
1 304 SS AISI 316
2 316 SS AISI 316L
3 Titanium 654 SMO
4 316L SS 254 SMO or other SS
5 Hastelloy-C-276 Titanium Grade 1
6 Incolloy 825 Titanium Grade 2
7 Monel 400 Hastelloy-C-276
8 316 High Moly G-30
9 304L SS Other materials
Year Of Manufacture
8 or 08 1998
9 or 09 1999
0 or 00 2000
1 or 01 2001
2 or 02 2002
3 or 03 2003
4 or 04 2004
5 or 05 2005
6 or 06 2006
7 or 07 2007
Month Of Manufacture
1 Jan/Feb NA
2 Mar/Apr NA
3 May/June NA
4 July/Aug NA
5 Sept/Oct NA
6 Nov/Dec NA
Source Prefi x
Year (two-digit)
Material
P 0X X XX
Heat No. Code (avail.
from Engineering
Plate Codes
Table 1
X X XXX
Material
Year
Heat No. Code (avail.
from Engineering
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