# Material Numbers

> Productivity

Canonical page: [https://chrome-stats.com/d/id6503355283](https://chrome-stats.com/d/id6503355283)

## Overview

- **ID:** `id6503355283`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** C-spec
- **Category:** Productivity
- **Version:** 1.3
- **Last updated:** 2024-09-10
- **First published:** 2024-06-13
- **Size:** 14 MB
- **Data as of:** 2026-09-22
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/material-numbers/id6503355283)
- **Privacy policy:** [http://weldofficeweb.com/#/privacy](http://weldofficeweb.com/#/privacy)

## Description

M Numbers:  Quick lookup of base metal weldability grouping numbers (Material 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 AWS B2.1 Table C.1 and C.2.

## Rankings

- #1,546,049 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6503355283)