30ml High-Temperature Resistant Industrial Pure Zirconium Crucible

Origin: Baoji, Shaanxi, China
Brand: FRL Metal
Name: Pure Zirconium Crucible
Grade: Zr702, Zr705, R60001, R60901
Density: 6.51g/cm³
Thickness: 10-50ml (Custom sizes available)
Standards: ASTM, DIN, EN
Production Process: Hot rolling, cold rolling, annealing
Surface Treatment: Pickling/Bright finish
Certification: ISO9001
Delivery Time: 5-7 days
Payment Method: Wire Transfer (T/T)
Packaging: Standard packaging

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Product Description

Complete Differences Between Pure Zirconium Crucibles (Zr702/R60702) and Zirconium Alloy Crucibles (Mainstream Zr705/R60705) In the industry, pure zirconium crucibles are defined as industrial pure zirconium Zr702; zirconium alloy crucibles are defined as zirconium-niobium alloy Zr705 (containing 2.0~3.0% Nb). The two differ significantly in raw materials, strength, purity, corrosion resistance, and applicable experimental scenarios.

I. Core Differences Between Composition and Grade

1. Pure Zirconium Crucible Zr702 (UNS R60702)
Definition: Industrially pure zirconium, Zr+Hf≥99.2%, only trace impurities, no alloying elements
Composition: Contains only trace amounts of Fe, Cr, O, C, N; Hf≤4.5%, niobium and tin are not present
Purity Advantage: Minimal matrix impurities, almost no foreign element contamination of the sample when smelting active metals

2. Zirconium Alloy Crucible Zr705 (UNS R60705)
Definition: Zirconium-niobium alloy, intentionally reinforced with 2.0%~3.0% metallic niobium
Composition: Zr balance + 2~3% Nb, impurity limit slightly higher than Zr702
Disadvantage: Contains niobium, cannot be used for high-purity experiments requiring absolutely niobium-free impurities.

II. Comparison of Mechanical and High-Temperature Properties

Performance Items	Pure Zirconium Zr702 Crucible	Zirconium Alloy Zr705 Crucible
Room Temperature Strength	Moderate, tensile strength approximately 450MPa, relatively soft texture, excellent plasticity, easily spin-formed into small crucibles. Significantly improved	strength, tensile strength ≈600MPa, yield strength nearly twice that of pure zirconium, higher rigidity.
High Temperature Creep Resistance	Prone to slight deformation under long-term high-temperature load; large-volume thin-walled crucibles are prone to bulging at the bottom.	High-Temperature Rigidity: Highly rigid at high temperatures, resistant to creep and deformation; larger sizes and thicker walls are more durable.
Impact/Abrasion Resistance	Moderate; easily dented by impacts.	Better hardness and abrasion resistance; longer lifespan with repeated filling and erosion.
Processing and Forming	Good ductility; ideal for laboratory crucibles (5~200ml); excellent weldability.	Lower plasticity; more difficult to process; higher cost for the same size.
Ultimate Operating Temperature	Vacuum/Inert long-term ≤1600℃, short-term 1700℃.	Ultimate temperature limits are basically the same. At 1600℃, the deformation is much smaller than that of pure zirconium.

Product Showcase

Comparison table of mechanical properties of industrial pure zirconium crucibles and zirconium-niobium alloy crucibles

III. Chemical Corrosion Resistance & Sample Contamination Differences (Core Selection Criteria for Laboratories)

Pure Zirconium Zr702: Stronger resistance to strong acids (hydrochloric acid, dilute sulfuric acid, hydrofluoric acid systems), molten alkalis, and halogen corrosion.
No niobium precipitation; does not introduce Nb impurities when melting Ti, Zr, rare earths, or high-purity metals.
Suitable for high-purity materials, trace element analysis, semiconductors, and rare earth purification experiments.

Zrconium Alloy Zr705: Corrosion resistance to conventional acids and alkalis is close to that of pure zirconium, but slightly weaker in high-concentration sulfuric acid and chloride media.
The matrix contains niobium; trace amounts of niobium impurities may dissolve in the high-temperature melt, contaminating high-purity samples.
Not suitable for the preparation of materials with strict Nb content limitations.

IV. Molding, Wall Thickness, and Service Life

Small Laboratory Crucibles (5~200ml)

Zr702: Standard Wall Thickness 2-3mm thick, spun in one piece, smooth inner wall, lower price, most common on the market.

Zr705: Requires thicker wall for the same volume, higher processing cost, rarely used for small sizes.

Medium to large industrial crucibles (500ml~10L and above)

Zr702: Prone to bottom bulging under long-term high temperature and pressure, requires thickening to 5-8mm.

Zr705: Stronger rigidity for the same wall thickness, less prone to deformation, service life increased by over 40% after repeated high-temperature melting.

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Product shipping and packaging

Plywood cases or other packaging suitable for truck, overseas, and air transport.
Details
① Layer 1: Wrapped in plastic bags.
② Layer 2: Shock-absorbing material to prevent damage.
③ Layer 3: Plywood cases, drums, or other suitable packaging.
④ Layer 4: Iron frames, packing straps, or waterproof film.
⑤ Markings: Destination, cargo description, order number, package number, net weight, country of origin, etc.
We work closely with air and sea freight forwarders—including FedEx, UPS, and DHL—to expedite delivery. No matter where you are located, we guarantee delivery at a speed that meets your satisfaction.

Why Choose Us?

With over a decade of industry experience, Baoji Furuilong is your trusted partner for raw material processing. Backed by a team of expert technical consultants and skilled machinists, we specialize in the R&D and manufacturing of processed components across a wide range of materials. We are committed to excellence, ensuring the perfect delivery of your products.

Our Strengths:

ISO9001-certified quality management system

Advanced CNC machining and heat treatment capabilities

Global reach spanning over 50 countries

Comprehensive professional support and consultation

Customized project management for specialized applications

Fast shipping and ample inventory

Contact Us

Our team is dedicated to serving you and hopes that every product you purchase will meet your expectations!

Email: lucky@bjfreelong.com

WhatsApp: +86 13335371763
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Please contact us for detailed quotations and technical specifications. We look forward to becoming your trusted high-end titanium materials partner.