# P Numbers

> Reference for base metal weldability grouping numbers for welding qualifications. (iPhone/iPad app by ASMEIX CORPORATION.)

- Source: https://appshunter.io/ios/app/p-numbers/id911716649 (this page in markdown: same URL + `.md`)
- Developer: [ASMEIX CORPORATION](https://appshunter.io/developer/911716652)
- Category: Productivity
- Price: Free
- Rating: 4.80/5 from 5 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 13 MB
- Languages: English
- Released: 2014-09-04
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/p-numbers/id911716649/reviews.md

## What is P Numbers?

P-Numbers: Quick lookup of base metal weldability grouping numbers for welding procedure and performance qualification. Data is provided by C-spec from the master source used for generation, proof-reading and maintenance of ASME Section IX Table QW/QB-422, AWS B2.1 Table C1 and C2, and ISO/TR 20173.

## Key features

- Base metal weldability grouping lookup
- Welding procedure qualification data
- Performance qualification data
- ASME Section IX Table QW/QB-422 data
- AWS B2.1 Table C1 and C2 data
- ISO/TR 20173 data

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/p-numbers/id911716649/reviews.md

### 5/5 — Excellent App

*2014-11-11*

This app is very user friendly and informative.  Provides all the information you need for identifying base materials.

## Frequently asked questions about P Numbers

### What is P Numbers used for?

P Numbers is used for quick lookup of base metal weldability grouping numbers essential for welding procedure and performance qualification. It draws data from authoritative sources like ASME Section IX and AWS B2.1.

### Is P Numbers free to use?

Yes, P Numbers is available for free. It does not require any payment to download or use its features.

### What devices does P Numbers support?

P Numbers is designed for Apple devices, including iPhone, iPad, and iPod. It is optimized for iOS.

### How accurate is the data in P Numbers?

The data in P Numbers is sourced directly from C-spec, the master source for ASME Section IX Table QW/QB-422, AWS B2.1 Table C1 and C2, and ISO/TR 20173. This ensures high accuracy and reliability for professional use.

### When was P Numbers last updated?

P Numbers was last updated on September 10, 2024, with version 2.1. This indicates ongoing maintenance and potential improvements.

### What is the age rating for P Numbers?

P Numbers has an age rating of 4+, making it suitable for a wide audience. This rating suggests no mature content.

### Does P Numbers have ads?

No, P Numbers does not contain advertisements. Users can access all its features without interruption from ads.

### How does P Numbers compare to other welding reference tools?

P Numbers offers direct access to specific weldability grouping numbers from key ASME and AWS standards, making it a focused and efficient tool for qualification purposes. Its free availability and high rating suggest strong user satisfaction.

## Version history (last 4 releases)

### 2.1 — 2024-09-10

The API domain has changed. All APIs functionality is the same.

### 2.0 — 2024-06-01

- Extended Data Table: Access an expanded dataset for more comprehensive weldability information.
- Performance Improvements: Experience faster load times and smoother navigation.
- Offline Mode: Use the app without an internet connection for increased convenience.
- Automatic Data Sync: Automatically upload and sync data changes without user intervention.
- New Design: Enjoy a refreshed, modern user interface.
- Dark Theme: Switch to a dark theme for a more comfortable viewing experience in low-light environments

### 1.0.3 — 2017-11-14

This app has been updated by Apple to display the Apple Watch app icon.

Updated 2017 P Numbers data and specifications

### 1.0.0 — 2014-09-04

No release notes.

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## More apps by ASMEIX CORPORATION

- [F Numbers](https://appshunter.io/ios/app/f-numbers/id929309069)
- [Material Numbers](https://appshunter.io/ios/app/material-numbers/id6503355283)
- [WeldOffice](https://appshunter.io/ios/app/weldoffice/id6615075038)

All apps by ASMEIX CORPORATION: https://appshunter.io/developer/911716652

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*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 2026-06-11.*