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Get a reliable estimate of PGM content in your material

We will need a sample with a minimum of 10 grams basis homogenous material.

A typical analysis takes two weeks after receipt of sample.

350 euros total, no hidden fees. The analysis costs will be waived if the project proceeds to an order.


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High temp alloy

Unique technique, developed and engineered by our own team.

Introduction

What we do

Serving your precious, minor metal need. Whenever, wherever.

about

Process for Producing the High-Temperature Alloy IN939 Using Crystalline Hafnium

The production of the high-temperature superalloy IN939 using crystalline hafnium involves several key metallurgical steps to ensure precise composition, cleanliness, and optimal mechanical properties:

01
Raw Material Preparation

High-purity base elements (Ni, Cr, Co, Mo, W, Al, Ti, etc.) are prepared along with crystalline hafnium (Hf crystal bar). All materials must meet strict impurity limits (especially O, N, C, S).

02
Vacuum Induction Melting (VIM)

The charge materials are melted in a vacuum induction furnace. Crystalline hafnium is added during melting to ensure proper dissolution and homogeneous distribution. Vacuum conditions minimize oxidation and gas pickup.

03
Alloy Composition Adjustment

Chemical composition is fine-tuned during melting. Hafnium plays a critical role in improving grain boundary strength, creep resistance, and oxidation resistance.

04
Casting (Vacuum Casting / Investment Casting)

The molten alloy is cast into ingots or directly into precision molds (investment casting), depending on the final application (e.g., turbine blades).

05
Remelting (Optional but Common)

To improve purity and microstructure, secondary melting processes such as Vacuum Arc Remelting (VAR) may be used.

06
Heat Treatment

The alloy undergoes solution heat treatment and aging to develop the desired γ′ (gamma prime) strengthening phase and optimize mechanical properties.

07
Machining and Finishing

Final components are machined and finished according to specifications.

Circular Economy

Closed-loop system

A closed-loop system is the key to sustainable, efficient, and cost-effective operations. By continuously recycling and reusing materials, you reduce waste, lower emissions, and minimize reliance on newly mined resources. This not only helps you meet environmental regulations, but also strengthens your business in reaching its sustainability and financial targets.

Circularity, in its purest form; returning a product to its original state — as it was. That’s the essence of a true closed-loop system. And that is exactly what we have created — a one-stop shop for full-circle precious metal recovery and supply.

Looking for advise about transitioning to a closed loop system? We are happy to offer our expertise.

FAQ

Have questions? We’re here to help.

Is your question not on the list? Get in touch with us for personal advise.

Give us a call

+31 (0) 85 018 9964
How does Circle PGM handle logistics?

Circle PGM works with long term logistics partners across the globe. This ensures trustworthy and secure shipments

What materials can Circle PGM recover?

We handle a wide variety of materials containing precious metals (PGMs) in all shapes and sizes. Our specialty lies in iridium and ruthenium coated materials, which we process using our unique, chemical-free method.

Is Circle PGM compliant with European environmental regulations?

Yes, Circle PGM is compliant with European environmental regulations. Our innovative, chemical-free recovery process aligns with the standards for sustainability, safety, and environmental protection. We continue to improve on a daily basis.

What materials can be recovered and refined?

If your material contains precious metals, recovery is possible, even from very low concentrations. Whether it involves coated materials, solids, liquids, hazardous substances, organics, catalysts, or any other form shape or size, our team is here to assist you. Feel free to get in touch with us!

What’s the difference between destructive and non-destructive coating removal?

Destructive coating removal breaks down both the coating and the substrate, making the substrate unusable. Non-destructive removal, however, separates the coating while preserving the substrate, allowing it to be reused. At Circle PGM, we specialize in non-destructive, chemical-free method to recover precious metals sustainably

Collaboration is the engine of progress.

We firmly believe that true progress happens when we work together. Close collaboration takes you further than going it alone — and only by joining forces can we make circularity a lasting success.