M390 steel

M390 steel
Name	M390
Othernames	CPM M390, Böhler M390
Type	Powder metallurgy martensitic stainless steel
Origin	Austria
Usedfor	Cutlery, surgical instruments, industrial blades, tooling

M390 steel M390 is a high-alloy, powder metallurgy stainless steel produced for high-end cutting applications. Developed by Böhler-Uddeholm and manufactured via powder metallurgy, it is marketed to makers in Solingen, Seki, and other blade-making centers. The grade is commonly specified by manufacturers supplying to firms such as Benchmade, Spyderco, Chris Reeve Knives, and Zero Tolerance.

Introduction

M390 emerged from collaboration between Böhler-Uddeholm and powder metallurgy specialists to meet demands from industries represented at events like the SHOT Show and trade fairs in Düsseldorf. The alloy was adopted by knife makers exhibited at venues such as Blade Show and has seen use by firms supplying military contractors for units including elements of NATO logistics. Its reputation spread through reviews in publications like Blade Magazine and testing by YouTubers working with makers such as Ontario Knife Company.

Composition and Metallurgy

M390's alloying reflects developments in metallurgy promoted at institutions like RWTH Aachen University and research from labs in Graz. Key elements are chromium, vanadium, and molybdenum combined with high carbon and niobium for carbide formation, aligning with powder metallurgy approaches used by companies like CPM (Crucible Industries). The powder consolidation process echoes techniques advanced by researchers at MIT and Fraunhofer Society, enabling fine carbide distribution similar to alloys studied at University of Sheffield metallurgical programs. Microstructural control parallels work presented at conferences such as the TMS Annual Meeting.

Properties and Performance

M390 offers high hardness, wear resistance, and corrosion resistance validated in tests reported by labs associated with Imperial College London and industrial testers contracted by brands like Kershaw. Edge retention comparisons frequently reference blades tested against specimens from D2, 154CM, S30V, CPM 20CV, and Elmax, with M390 often outperforming in reciprocating abrasion tests published in journals linked to ASM International. Corrosion resistance is compared to grades evaluated by laboratories accredited by ISO and standards bodies such as DIN.

Heat Treatment and Processing

Heat treatment schedules for M390 are informed by studies at metallurgy departments like Colorado School of Mines and procedures used by heat-treat service providers in Germany and Japan. Typical hardening and tempering parameters are developed by manufacturers supplying to companies such as Kaufmann and heat treaters that comply with certifications like ISO 9001. Processing challenges include carbide management discussed at symposiums hosted by ASM International and in papers from TMS.

Applications and Uses

Primary uses of M390 include folding knives, fixed blades, surgical scalpels, and industrial shear blades supplied to firms showcased at MEDICA and industrial exhibitions in Hanover. Military and law enforcement procurement offices that source equipment from contractors represented at Eurosatory have evaluated blades made from M390. Makers in bladesmithing communities tied to guilds in Solingen and workshops in Seki and Fukuoka select M390 for premium products marketed through retailers like REI and specialty shops reviewed in Gear Patrol.

Comparison with Other Steels

Comparative performance of M390 is often framed alongside CPM S30V, CPM 20CV, Elmax, 154CM, D2, and VG-10 in reviews appearing in outlets such as Popular Mechanics and academic comparisons presented at TMS Annual Meeting. In wear tests reported by independent labs collaborating with institutions like University of Cambridge, M390's fine carbides yield better polishability and edge retention versus coarser-carbide steels favored historically in regions like Solingen.

Manufacturing and Quality Standards

Production of M390 follows powder metallurgy routes developed by firms like Böhler-Uddeholm with quality oversight tied to certifications familiar to manufacturers selling at fairs such as the CATTEX. Suppliers often demonstrate compliance with ISO 9001 and material data sheets reference test methods from bodies like ASTM International and DIN. Traceability practices mirror procedures used by aerospace and medical suppliers who work with agencies such as EASA and national regulators in Austria.

Category:Steels