Metallographic Sample Preparation of the Yuan Dynasty Fire Lance- Trojan (Suzhou) material technology Co., Ltd.

Metallographic Sample Preparation of the Yuan Dynasty Fire Lance

31-03-2026

The Yuan Dynasty fire lance is the earliest surviving metal tubular shooting firearm in China and even the world—a true milestone in ancient thermal weapons!

In the early and middle periods, it was mainly cast from bronze alloys with a sophisticated copper-tin-lead ratio: boasting excellent toughness and chamber pressure resistance, it rarely suffered from barrel bursts and featured outstanding durability. As military demand soared amid the wars in the late Yuan Dynasty, pig iron fire lances were developed for their low cost and easy mass production, perfectly adapting to wartime military supply needs.

From a materials engineering perspective, the precise selection of bronze alloys (with a tailored copper-tin-lead ratio) balanced strength and toughness, solving the core pain point of barrel bursts plaguing early firearms. The switch to pig iron in the late Yuan Dynasty based on military needs even aligns with the modern military concept of cost control + mass production—it was a rational, combat-oriented design, not a blind pursuit of intricate craftsmanship.

In terms of weapon evolution, it completely bid farewell to the primitive form of bamboo-wood combustion-based firearms and established the core framework of tubular shooting, gunpowder propulsion and caliber-specific design. As the first prototype of modern firearms and artillery, it laid the fundamental development path for thermal weapons a century ahead of its time.

Metallographic Sample Preparation Parameters & Microstructure Appreciation of the Yuan Dynasty Fire Lance

1️⃣ Grinding: MET-SP P600-4000

2️⃣ Rough Polishing: SC + 1μm PD-WT

3️⃣ Final Polishing: ZN + SO-A539

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