Technical Resources

Tungsten Powder Technical Blog

Practical guides on tungsten powder specifications, grain size selection, material comparisons, and export sourcing — written by Jayanth Tungsten's technical team.

Technical Guide

How to Select the Right Tungsten Carbide Powder Grade for Your Application

Tungsten carbide (WC) powder is the primary hard phase in cemented carbide — the material behind cutting inserts, drill bits, wear plates, and hundreds of other industrial components. But not all WC powder is the same. Grain size, carbon content, apparent density, and oxygen content all affect how the powder sinters, what the finished carbide's hardness and toughness will be, and whether the part will survive in service. This guide explains how to read a WC powder specification and match it to your application.

7 min read20 Jun 2026

Technical Guide

What is FSSS Particle Size in Tungsten Powder? Fisher Sub-Sieve Size Explained

If you have ever received a tungsten powder datasheet or certificate of analysis, you will have seen a grain size quoted in micrometres as 'F.S.S.S.' — for example '4.5 µm F.S.S.S.' This number is measured by a specific instrument and method, and it controls some of the most important properties of the finished cemented carbide or tungsten alloy part. Understanding what F.S.S.S. means — and what it does not tell you — is essential for specifying and qualifying tungsten powder for production use.

5 min read27 Jun 2026

Technical Guide

WC Powder vs Fused Tungsten Carbide (W₂C) — Key Differences Explained

Both tungsten carbide powder and fused tungsten carbide are sold as 'tungsten carbide' — but they are chemically distinct materials with completely different production routes, properties, and end uses. Confusing the two in a specification leads to wrong material selection and significant product failures in the field. This article explains what distinguishes WC powder from fused tungsten carbide (also sold as W₂C grit or fused WC), when each is used, and what questions to ask your supplier.

6 min read4 Jul 2026

Sourcing & Supply Chain

Tungsten Powder Supplier India — Why Source from an Indian Manufacturer?

For decades, international buyers of tungsten powder — tungsten metal (W), tungsten carbide (WC), ammonium paratungstate (APT), and tungsten oxides — had limited choices: buy from Chinese producers who control roughly 80% of global tungsten output, or pay a significant premium for material from specialty Western producers. A third supply option has been developing steadily: ISO-certified Indian tungsten powder manufacturers who process imported APT into finished tungsten powders for export. This article explains what Indian-origin tungsten powder offers in terms of quality, certification, pricing, and supply chain security.

6 min read11 Jul 2026

Product Guide

What is Ammonium Paratungstate (APT)? Properties, Uses, and Specifications

Ammonium paratungstate — universally abbreviated APT — is the most commercially important intermediate in the global tungsten supply chain. Approximately 90% of the world's primary tungsten production passes through the APT stage before being converted to tungsten metal, tungsten carbide, or tungsten chemicals. Despite its central role in the industry, APT is less well known than the downstream products it produces. This article explains what APT is, how it is made, what the key specification parameters mean, and how it is used.

5 min read18 Jul 2026

Technical Guide

Copper-Tungsten Contact Materials: Manufacturing, Grades, and Powder Selection

Copper-tungsten (Cu-W) composite materials are the workhorses of high-voltage electrical switchgear, vacuum interrupters, and high-current relays. Their unique combination — the conductivity of copper and the arc-erosion resistance and high melting point of tungsten — makes them irreplaceable in applications where electrical arcing would destroy a conventional copper contact in hours. This guide explains how Cu-W contact materials are made, what powder grades are used, and what buyers need to specify when sourcing W powder for contact manufacture.

8 min read18 Aug 2026

Technical Guide

HVOF WC-Co Powder Selection: Grades, Particle Size, and Process Parameters

High velocity oxy-fuel (HVOF) thermal spray is the dominant process for applying tungsten carbide-cobalt (WC-Co) hard coatings in oil and gas, aerospace, paper, and general engineering. The quality of the coating depends on two interlinked factors: the spray gun/process parameters, and the powder itself. This guide focuses on the powder side — how to select the right WC-Co grade, understand particle size specifications, and avoid the most common powder-related coating failures.

7 min read18 Aug 2026

Sourcing Guide

India vs China Tungsten Powder: Sourcing, Quality, and Supply Chain Considerations

China supplies approximately 80% of global refined tungsten — ammonium paratungstate (APT), tungsten metal powder, and tungsten carbide powder. For decades, most buyers outside China simply accepted this concentration as a market reality. But since 2023, a combination of geopolitical tension, supply chain risk awareness, export control concerns, and dual-sourcing requirements from OEM customers has pushed procurement managers to actively evaluate alternative tungsten sources. India — particularly the cluster of manufacturers in Karnataka — has emerged as the most developed alternative for W and WC powder. This guide walks through the key considerations.

6 min read18 Aug 2026

Process Guide

How Tungsten Metal Powder Is Made: From APT to Reduced Metal

Almost every kilogram of tungsten metal powder in industrial use has passed through the same three-stage route: ammonium paratungstate, then tungsten oxide, then hydrogen reduction to metal. Understanding that route is genuinely useful to a buyer, because the grain size and oxygen content you see on a certificate of analysis are not independent properties a supplier dials in at the end — they are consequences of decisions made at each stage. This guide walks the process and explains what each stage controls.

8 min read21 Sept 2026

Technical Guide

Tungsten Carbide Grit Mesh Sizes: Choosing 30/40 to 100/120 for Hard Facing

Hard facing grit is sold by mesh band — 30/40, 40/60, 60/80, 100/120 — and the choice between them is made far too often by habit or by whatever the shop used last time. It is worth more thought than that, because grit size interacts with the abrasive you are fighting, the welding process you are depositing with, and the thickness of the overlay. Getting it right can multiply service life; getting it wrong wastes expensive material.

6 min read21 Sept 2026

Sourcing Guide

Sourcing Tungsten Powder from India: A Buyer's Due Diligence Guide

India has become a credible alternative source of tungsten powders for buyers looking to diversify away from a single-country supply chain. But diversification only helps if the new supplier actually performs, and the qualification work is on you. This guide sets out what to verify, what to pin down in the specification, and how to structure a trial before you commit production volume — written from the supplier side, which means it includes the questions we would rather you asked.

9 min read21 Sept 2026

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