Applications only, filler metal classification within an SFA specification, with the same F-number and the same A-number and the same minimum tensile strength and the same nominal chemical composition can be used in WPS. (ASME Section IX, QW-250) All Positions for Plate or Pipe. (5 mm) Min., 2T Max. (Plate or Pipe) All Nominal Pipe. Typical base metal specifications for these steels are ASTM A 36, A 285-C, A 515-55, and A 516-70, which have UNS Numbers K02600, K02801, K02001, and K02700, respectively. Pinnacle Alloys ER70S-6 is available in spools, drums, and cut-lengths, as well as in various finishes/coatings, such as copper coated, copper free (bare), and bronze finish.
S Numbers were assigned to those materials which were acceptable for use by the ASME B31 Code for Pressure Piping, or by selected Boiler and Pressure Vessel Code Cases, but were not included in section II of ASME Boiler and Pressure Vessel (BPVC). These specifications are designated by SFA numbers and are derived from AWS specifications. Careful application of this Section will help users to comply with applicable regulations within their jurisdictions, while achieving the operational, cost and safety benefits to be gained from the many industry best-practices detailed within these volumes.
ASME P-Numbers
To reduce the number of welding and brazing procedure qualifications required base metals have been assigned P-Numbers by the ASME BPVC.Ferrous metals which have specified impact test requirements have been assigned Group Numbers within P-Numbers.
These assignments have been based on comparable base metal characteristics, such as:
Asme Section Ii Part C
- Composition
- Weldability
- Brazeability
- Mechanical Properties
Indiscriminant substitution of materials in a set of P-Numbers or Group Numbers may lead to problems or potentially failures.Engineering assessment is necessary prior to a change in materials.
When a base metal with a UNS number Designation is assigned a P-Number, then a base metal listed in a different ASME material specification with the same UNS number shall be considered that P-Number.
The table below is a guide and is for instructive purposes only. Anyone specifying materials or requirements should refer directly to the ASME Boiler and Pressure Vessel Code to specify materials, P-Numbers, procedures, or other requirements and not rely on the table below. The table below is only a rather INCOMPLETE and APPROXIMATE summary of ASME data for INSTRUCTIONAL USE ONLY. See ASME Boiler and Pressure Vessel Code for materials specifications and P-Numbers.
P-Numbers | Base Metal (Typical or Example) |
1 | Carbon Manganese Steels (four Group Numbers) |
2 | Not Used |
3 | Half Molybdenum or half Chromium, half Molybdenum (three Group Numbers) |
4 | One and a quarter Chromium, half Molybdenum (two Group Numbers) |
5A | Two and a quarter Chromium, one Molybdenum |
5B | Five Chromium, half Molybdenum or nine Chromium, one Molybdenum (two Group Numbers) |
5C | Chromium, Molybdenum, Vanadium (five Group Numbers) |
6 | Martensitic Stainless Steels (Grade 410, 415, 429) (six Group Numbers) |
7 | Ferritic Stainless Steels (Grade 409, 430) |
8 | Austenitic Stainless Steels
|
9A, B, C | Two to four Nickel Steels |
10A, B, C, F | Various low alloy steels |
10H | Duplex and Super Duplex Stainless Steel (Grades 31803, 32750) |
10I | High Chromium Stainless Steel |
10J | High Chromium, Molybdenum Stainless Steel |
10K | High Chromium, Molybdenum, Nickel Stainless Steel |
11A | Various high strength low alloy steels (six Group Numbers) |
11B | Various high strength low alloy steels (ten Group Numbers) |
12 to 20 | Not Used |
21 | High Aluminum content (1000 and 3000 series) |
22 | Aluminum (5000 series - 5052, 5454) |
23 | Aluminum (6000 series – 6061, 6063) |
24 | Not Used |
25 | Aluminum (5000 series - 5083, 5086, 5456) |
26 to 30 | Not used |
31 | High Copper content |
32 | Brass |
33 | Copper Silicone |
34 | Copper Nickel |
35 | Copper Aluminum |
36 to 40 | Not Used |
41 | High Nickel content |
42 | Nickel, Copper - (Monel 500) |
43 | Nickel, Chromium, Iron - (Inconel) |
44 | Nickel, Molybdenum – (Hastelloy B2, C22, C276, X) |
45 | Nickel, Chromium |
46 | Nickel, Chromium, Silicone |
47 | Nickel, Chromium, Tungsten |
47 to 50 | Not Used |
51, 52, 53 | Titanium Alloys |
61, 62 | Zirconium Alloys |
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