Chromium Metal Lump | Technical Specifications & Procurement Guide
Chromium Metal Lump is a high-purity metallurgical raw material primarily used in the production of nickel- and cobalt-base superalloys, high-grade stainless steels, and specialty welding consumables. Produced via aluminothermic reduction or electrolytic refining, our chromium lumps offer controlled low gas content (Nitrogen, Oxygen, Carbon) to prevent inclusion defects in critical aerospace, defense, and industrial turbine components. Supplying VIM-grade metals to alloy foundries across North America and Europe since 2008.
Key Features
High Purity Matrix: Consistently maintained at >= 99.2% to 99.8% Cr content.
Controlled Gas Impurities: Low carbon, nitrogen, and sulfur levels tailored for vacuum induction melting (VIM).
Optimized Sizing: Uniform lump geometry (10-50mm) with customized sizing options available upon request to meet specific furnace charging requirements.
Traceable Batch Integrity: Each production heat is sampled, analyzed via ICP-OES and inert gas fusion, and supplied with a verifiable Mill Test Certificate (MTC).
Key Specifications
|
Parameter |
Standard Grade (Cr-99.2) |
High-Purity Grade (Cr-99.8) |
|
Cr Content |
>= 99.2% |
>= 99.8% |
|
Form |
Irregular lumps |
Irregular lumps, chemically cleaned surface |
|
Standard Size |
10-50mm |
10-50mm (custom sizing down to 5-30mm available) |
|
Density |
approx. 7.15 g/cm3 |
approx. 7.19 g/cm3 |
Chemical Composition
Typical impurity limits (wt% max) verified by spectrometry analysis:
|
Element |
Standard Grade (wt%) |
High-Purity Grade (wt%) |
|
Iron (Fe) |
<= 0.40% |
<= 0.08% |
|
Silicon (Si) |
<= 0.15% |
<= 0.03% |
|
Carbon (C) |
<= 0.04% |
<= 0.01% |
|
Nitrogen (N) |
<= 0.05% |
<= 0.01% |
|
Oxygen (O) |
<= 0.15% |
<= 0.03% |
|
Sulfur (S) |
<= 0.01% |
<= 0.005% |
Applications
Alloying element for nickel-base and cobalt-base superalloys used in aerospace turbine blades and land-based gas turbines.
Production of corrosion-resistant, high-temperature stainless steels and tool steels.
Raw ingredient in flux-cored wires and coated electrodes for hard-facing and high-stress corrosion-resistant joints.
Grain refinement and hardening agent in specialized copper and aluminum master alloys.
Manufacturing & Quality Control
Production relies on vacuum refining and strict feedstock selection to keep trace contaminants to a minimum.
Testing Equipment: Direct-reading optical emission spectrometers (ICP-OES) and automated gas determinators for oxygen, nitrogen, and hydrogen.
Inspection Protocol: Every individual heat undergoes full spectrum analysis and inert gas fusion prior to crushing, sizing, and packaging. Retained reference samples from every lot are archived for 24 months.
Packaging & Shipping
Standard Packaging: 25kg steel drums on ISPM-15 heat-treated wooden pallets, or 1000kg UN-certified heavy-duty big bags lined with moisture-resistant polyethylene.
Storage Requirements: Store in a dry, ventilated indoor warehouse away from mineral acids and high-humidity environments.
Shipping Compliance: Classified as non-hazardous cargo for ocean and air freight, adhering to international IMDG and IATA regulations.
Documentation
Standard export documents provided with every shipment:
Commercial Invoice & Detailed Packing List
Mill Test Certificate (MTC) displaying actual batch chemical breakdown
Certificate of Origin (CO)
Bill of Lading (B/L)
MOQ & Lead Time
|
Minimum Order Quantity (MOQ) |
1,000kg (1 metric ton); trial sample quantities (5-10kg) available for metallurgical evaluation. |
|
Production Lead Time |
15 to 25 days for standard inventory grades; 30 to 40 days for custom-sized or dedicated vacuum-melted heats. |
|
Incoterms |
FOB, CIF, and DDP terms available upon request. |
FAQ
Q: Can you accommodate third-party pre-shipment inspections (e.g., SGS, Bureau Veritas)?
A: Yes, independent third-party inspections are fully supported and can be arranged prior to dispatch.
Q: How do you prevent oxidation and moisture contamination during ocean transit?
A: Lumps are packed in hermetically sealed steel drums containing industrial desiccants, or secured inside heavy-duty polyethylene liners within woven containment bags.
Q: What is the exact particle size distribution tolerance for the 10-50mm grade?
A: Controlled strictly to maintain less than 5% undersize (<10mm) and less than 5% oversize (>50mm) per delivered lot.
Request a Quote
To receive a formal commercial quotation or request laboratory test samples, please provide:
Required Grade (Standard vs. High-Purity) & Sizing
Total Order Quantity or Sample Requirement (with Destination Port / Incoterms)
Target Delivery Schedule or Annual Framework Requirement
[ Submit RFQ / Request Lab Sample ]
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