Blog
Technical guides, specification deep-dives, and compliance automation insights from the MTR.AI engineering team.
How to Read a Mill Test Report: A Quality Manager's Guide
A practical guide to reading and interpreting Mill Test Reports. Covers document structure, chemical composition tables, mechanical properties, and common pitfalls in MTR review.
API 5L PSL1 vs PSL2: What Your MTR Must Include
Understand the critical differences between API 5L PSL1 and PSL2 requirements for Mill Test Reports. Covers chemistry limits, mechanical testing, and supplementary requirements.
Carbon Equivalent (CE) in Mill Test Reports: Why It Matters for Weldability
How carbon equivalent is calculated, why it matters for weldability assessment, and how to verify CE values on Mill Test Reports using the IIW and Pcm formulas.
The Hidden Cost of Manual MTR Review
Quantifying the real cost of manual Mill Test Report review: labor hours, error rates, delayed receiving, and the compliance risks most quality teams accept without realizing it.
ASTM A106 Grade B: Complete Specification Guide for MTR Verification
Comprehensive guide to ASTM A106 Grade B seamless carbon steel pipe. Covers chemical composition limits, mechanical property requirements, and what to verify on every MTR.
Mill Test Report vs Mill Test Certificate: Understanding EN 10204 Types
Clarifying the difference between Mill Test Reports (MTRs) and Mill Test Certificates (MTCs), and understanding the EN 10204 certificate types from 2.1 to 3.2.
What Is a Mill Test Report? The Complete Guide
Everything you need to know about Mill Test Reports: what they contain, who creates them, what standards require them, and how to verify one. The definitive primer for quality engineers.
EN 10204 Certificate Types Explained: Type 2.1, 2.2, 3.1, and 3.2
A comprehensive guide to EN 10204 inspection document types. Understand the differences between Type 2.1, 2.2, 3.1, and 3.2 certificates and when each is required.