# A-Number — Weld Metal A-Number > Calculates weld metal A-Number based on chemical composition for ASME Section IX. (iPhone/iPad app by Shabbir Ahmed.) - Source: https://appshunter.io/ios/app/a-number/id1547102751 (this page in markdown: same URL + `.md`) - Developer: [Shabbir Ahmed](https://appshunter.io/developer/1083166021) - Category: Utilities, Productivity - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 13.0 · 2 MB - Languages: English - Released: 2022-04-27 - Data updated: 2026-06-01 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/a-number/id1547102751/reviews.md ## What is A? Background The A-Number is essential variable in most of the welding process in ASME Section IX. A-Number in WPS does not refer to the filler wire or electrode chemical composition, it refers to the deposited weld metal chemical composition. The filler metal and deposited weld metal have different chemical composition. Acceptable method of determining weld metal chemical composition is given in QW-404.5 of ASME Section IX. Applicable Code / Edition & Standards The weld metal A-Number determination is in accordance with ASME Section IX 2023 Edition. Utility This app determine the assigned A-Number based on chemical composition in a "as weld" condition. Weld metal A-Number is used for procedure qualification. Changes in weld metal A-Number may require procedure re-qualification. Competitive Edge There is no app available in the market to determine weld metal A-Number. User mostly compare weld metal composition against ranges given in ASME Section IX. This handy tool makes life easy by comparing the chemical composition to that of the ranges for given A-Number and provide accurate result. Target Audience This app targets inspection agencies, pressure items manufacturing organizations, quality control personnel, welders, welding operators, students who are involved in welding trades and institutions who are doing procedure qualification testing. ## Key features - Determines A-Number from chemical composition - Compares weld metal to ASME Section IX ranges - Aids in procedure qualification - Supports ASME Section IX 2023 Edition - Provides accurate results ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Non-Consumable Subscription | $1.99 | one-time | ## Frequently asked questions about A ### What is the A-Number app used for? The A-Number app calculates the assigned A-Number for deposited weld metal based on its chemical composition in an 'as weld' condition. This is crucial for procedure qualification testing according to ASME Section IX. ### Does the A-Number app support the latest ASME Section IX edition? Yes, the A-Number app's determination of weld metal A-Number is in accordance with the ASME Section IX 2023 Edition. ### Who is the target audience for the A-Number app? The app targets inspection agencies, pressure item manufacturers, quality control personnel, welders, welding operators, students in welding trades, and institutions conducting procedure qualification testing. ### How does the A-Number app compare to manual methods? This handy tool makes life easier by directly comparing the chemical composition to the ranges for a given A-Number, providing accurate results, unlike users manually comparing compositions against ranges in ASME Section IX. ### What devices is the A-Number app available on? The A-Number app is available on Mac, iPhone, and iPad devices. ### When was the A-Number app last updated? The A-Number app was last updated on January 8, 2024, with the latest version being 4.4. ### What is the user rating for the A-Number app? The A-Number app has a perfect rating of 5.0 stars based on one review. ### Does the A-Number app have ads? No, the A-Number app does not contain advertisements. ## Version history (last 3 releases) ### 4.4 — 2024-01-08 Compliance to 2023 of ASME Section IX ### 3.0 — 2022-05-31 The Main screen update for acronym, no change in functionality. ### 2.0 — 2022-04-28 No release notes. ## Apps similar to A | App | Rating | Price | Category | | --- | --- | --- | --- | | [Welding Toolbox 2](https://appshunter.io/ios/app/welding-toolbox-2/id1546617906) | — | $7.99 | Utilities | | [Tank Volume Calculator Pro](https://appshunter.io/ios/app/tank-volume-calculator-pro/id1491606900) | — | $3.99 | Utilities | | [Welding Weight Calculator Pro](https://appshunter.io/ios/app/welding-weight-calculator-pro/id1491205254) | — | $5.99 | Utilities | | [WeldEquations](https://appshunter.io/ios/app/weldequations/id1266859627) | — | Free | Utilities | | [Welds Tracker](https://appshunter.io/ios/app/welds-tracker/id6458731470) | — | Free | Utilities | | [Tulsa Pipeliners Club App](https://appshunter.io/ios/app/tulsa-pipeliners-club-app/id1499424899) | — | Free | Utilities | ## More apps by Shabbir Ahmed - [W/WO-PQ Flashcard](https://appshunter.io/ios/app/wwo-pq-flashcard/id1506354197) - [StressTable2021](https://appshunter.io/ios/app/stresstable2021/id6461216630) - [StressTable2023](https://appshunter.io/ios/app/stresstable2023/id6461216870) - [PreHeat](https://appshunter.io/ios/app/preheat/id6461216985) - [WPQ Record](https://appshunter.io/ios/app/wpq-record/id6461217142) All apps by Shabbir Ahmed: https://appshunter.io/developer/1083166021 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*