{"product_id":"simpmelts-graphite-crucible-ingot-mold-1-kg-grooved-high-temp-crucible-for-gold-silver-copper","title":"SimpMelts Graphite Crucible \u0026 Ingot Mould 1 kg – Grooved High-Temp Crucible for Gold, Silver, Copper","description":"\u003cp\u003e\u003cstrong\u003eSimpMelts graphite crucible and ingot mould is a grooved, high‑temperature vessel sized for up to 1 kg of metal, built for safe handling and long service life in electric melting furnaces.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis crucible and mould set is designed to pair with PID electric melting furnaces such as the SimpMelts 1400W unit, giving hobbyists and small-scale metalworkers a reliable tool for melting nonferrous metals. Made from dense natural graphite with a glazed finish, the pieces prioritize thermal stability, corrosion resistance and easier removal from the furnace. The grooved profile accepts tongs securely and helps reduce metal clinging during pours.\u003c\/p\u003e\n\n\u003ch3\u003eHow big is this crucible and what metals will it hold?\u003c\/h3\u003e\n\n\u003cp\u003eThe crucible holds up to 1 kilogram of metal (approximately 130 ml volume) and is dimensioned for compact furnaces. Typical use includes gold, silver, copper, aluminium and brass when processed in appropriate electric or protected-atmosphere environments.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCapacity: 1 kg \/ 130 ml\u003c\/li\u003e\n  \u003cli\u003eDimensions: 65 mm diameter × 125 mm height\u003c\/li\u003e\n  \u003cli\u003eWeight: 250 g\u003c\/li\u003e\n  \u003cli\u003eSuitable for a wide range of nonferrous metals in electric furnaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat makes the grooved graphite design useful?\u003c\/h3\u003e\n\n\u003cp\u003eThe grooved outer profile improves contact points for tongs and cuts down on molten metal sticking to the crucible walls, making removal and handling steadier and more predictable. Graphite’s natural thermal conductivity also helps heat distribution while the low expansion reduces the risk of cracking under rapid temperature changes.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eGrooves allow secure gripping with crucible tongs\u003c\/li\u003e\n  \u003cli\u003eMinimizes metal waste by easing release at pour\u003c\/li\u003e\n  \u003cli\u003eLow thermal expansion for better dimensional stability\u003c\/li\u003e\n  \u003cli\u003eEven heat transfer for consistent melt behavior\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow hot can this crucible go and are there usage limits?\u003c\/h3\u003e\n\n\u003cp\u003eThe crucible performs robustly in modern electric melting systems but has environment-dependent limits. In electric air furnaces it resists temperatures up to about 3200°F; in vacuum or gas-shielded setups it withstands much higher temperatures. Avoid direct exposure to open carbon or charcoal fires above roughly 752°F (400°C) to prevent oxidation and premature wear.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eElectric air furnace limit: up to ~3200°F\u003c\/li\u003e\n  \u003cli\u003eVacuum\/gas-protected limit: up to ~5000°F\u003c\/li\u003e\n  \u003cli\u003eDo not use in open charcoal\/carbon furnaces above ~752°F\u003c\/li\u003e\n  \u003cli\u003eFollow furnace manufacturer safety and ventilation guidelines\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow durable is the crucible and how long will it last?\u003c\/h3\u003e\n\n\u003cp\u003eThe crucible is moulded from dense natural graphite and finished with a protective glaze designed to improve corrosion resistance and extend service life. Proper handling—using tongs on the grooved profile, avoiding thermal shock, and operating within recommended atmospheres—will maximize cycles before replacement is needed.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDense graphite construction for mechanical strength\u003c\/li\u003e\n  \u003cli\u003eGlazed surface reduces chemical attack and wear\u003c\/li\u003e\n  \u003cli\u003eMinimize rapid temperature swings to prevent cracking\u003c\/li\u003e\n  \u003cli\u003eRegular inspection recommended after repeated high-heat cycles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This SimpMelts crucible and ingot mould set suits jewellers, small foundries, metal hobbyists and repair shops that use electric PID melting furnaces and need a compact, reliable vessel for nonferrous metal work. It’s intended for users who understand furnace atmospheres and follow safe handling practices—especially when working at high temperatures or in protected-gas setups.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I use this crucible in a charcoal furnace?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. Avoid direct charcoal or carbon furnaces above ~752°F (400°C) due to oxidation risk. Use electric or gas-protected setups instead.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the crucible capacity and size?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Capacity is 1 kg (130 ml); dimensions are 65 mm diameter by 125 mm height and it weighs 250 g.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"SimpMelts","offers":[{"title":"Default Title","offer_id":55253187133777,"sku":"B0FPQRNGFX","price":32.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/simpmelts-front-packaging-graphite-crucible.jpg?v=1791656738","url":"https:\/\/craftiche.co.uk\/products\/simpmelts-graphite-crucible-ingot-mold-1-kg-grooved-high-temp-crucible-for-gold-silver-copper","provider":"Craftiche","version":"1.0","type":"link"}