The Prong That Snapped Told You Everything You Needed to Know.

He didn’t read the spec sheet. He didn’t ask about the alloy code or the melting range. He picked up the piece, gripped the prong with his pliers, and adjusted.

It snapped.

That’s how your stone-setter evaluates your alloy. Not in the laboratory. Not in the melt room. At the bench, with a pair of pliers and a stone that needs to sit right.

Aur jab prong tootata hai, toh kaarigar ko alloy ka naam nahi chahiye. Usse bas yeh pata hai: "Yeh metal kaam ka nahi hai."

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The Hardness Trap Nobody Talks About

Here’s the paradox. Every manufacturer wants hard white gold. Hard means the piece holds up at retail, resists scratching, keeps the stone tight for years. That’s the spec everyone chases.

But the kaarigar needs it to bend first. Just enough. Just once. To close the prong around the stone without the metal cracking under his hands.

Most white gold casting alloys give you one or the other. Hard enough to survive retail? Too brittle for the setter. Soft enough for setting? The customer’s ring deforms in six months.

The result is a quiet negotiation on every shopfloor in India. The casting head picks an alloy for hardness. The setter compensates with technique. And when technique isn’t enough, the stone cracks, the prong breaks, and the piece goes back to the beginning.

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What This Actually Costs You

Nobody runs a ledger on snapped prongs. But the costs accumulate in places you stop noticing:

Stone replacement: one cracked CZ is cheap. One cracked emerald is not. And you’re paying for both the stone and the rework labour.

Setter frustration: a skilled kaarigar who breaks three prongs in a morning doesn’t blame his technique. He blames your metal. And he’s right.

Multi-alloy complexity: running one alloy for 9 KT export and another for 14 KT domestic means two parameter sheets, two melting protocols, and double the risk of cross-contamination.

No hardening option: what you cast is what you get. If the as-cast hardness isn’t enough for pavé or micro-prong work, you have no path forward except changing the alloy.

Kitna paisa jaata hai prong replacement mein? Koi count nahi karta. Par hota zaroor hai.

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What Changes When the Metal Bends Before It Breaks

WB143C is a white gold master alloy from Legor, designed for investment casting across the 9–14 KT range. Its copper-silver-zinc-nickel composition is calibrated for one specific outcome: the piece must survive the setter’s bench and the customer’s hand.

Two numbers matter here:

12% elongation at rupture. That’s the metal’s willingness to bend before it breaks. Your setter adjusts the prong it stays. No crack. No snap. No rework.

315 HV after a single age-hardening step. That’s 350°C for 90 minutes in your existing furnace. The same piece that bent for the setter now resists scratching, deformation, and stone loosening for years at retail.

Pehle bend karna hai, phir hard hona hai. Yahi sequence chahiye aur yahi milta hai.

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On the Floor, This Looks Like:

Fewer snapped prongs: 12% elongation means the setter works with confidence, not caution.

Stones that stay: 45–60 minute controlled cooling for stone-in-place casting protects gems during solidification.

One alloy, one shelf: 9 KT and 14 KT from the same master alloy. One parameter sheet. One melting protocol.

Post-casting strength on demand: 215 HV as-cast for workability, 315 HV after age-hardening for durability. You choose when the hardness comes.

What This Won’t Fix

WB143C is formulated for 9–14 KT only. If you’re casting 18 KT or 22 KT white gold, this isn’t your alloy.

It contains 14% nickel. For EU skin-contact jewellery, verify REACH / Nickel Directive compliance before shipping. We don’t make regulatory claims that’s on the manufacturer.

Deoxidation level is low. If your investment or burnout cycle introduces porosity, address that first. No alloy fixes a process gap.

Par agar aapka casting process solid hai, aur aap chahte hain ki setter ke haath mein metal kaam kare not against him toh baat karte hain.

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Worth a Trial Batch?

If your setter is breaking prongs, or your 9 KT and 14 KT lines are running on separate alloys, or your finished pieces aren’t holding up past three months at retail there’s a conversation here.

Request a trial quantity. Our team will work with your casting head and your setter to optimise flask temperatures, cooling times, and the age-hardening cycle for your specific setup.

Reach out: help@preciousalloys.com | +91-22 6101 4444