How do you guarantee the quality of the product?

We always provide a pre-production sample before mass production and conduct a final inspection before shipment.

What are the accepted payment terms and currencies?

Accepted payment types include T/T, L/C, D/P, D/A, Credit Card, Western Union, and Cash. Currencies include USD, EUR, JPY, CAD, AUD, HKD, GBP, CNY, and CHF.

What is the minimum order quantity (MOQ)?

The minimum order quantity is 1 ton.

Polished Black Emery Sand Blasted Rust Removal First Class Black Corundum

Name: Polished Black Emery Sand Blasted Rust Removal First Class Black Corundum
Brand: Zhengzhou Shanjie District Qianjiaxin New Material Firm
SKU: 2084424212

Henan, ChinaZhengzhou Shanjie District Qianjiaxin New Material Firm

US$566.00

25-99 Tons

US$326.00

100+ Tons

Product profile

Customization

Available

Natural Abrasive Type

Black Corundum

Artificial Abrasive Type

Corundum Abrasives

Model NO.

QJX07-26

Application

Machinery

Function

Surface Deburring

Source

Artificial Abrasives

Particle Size

Abrasive

Hardness

Superabrasive

Mohs Hardness

8.5

Colour

Black

Advantages

High Hardness

Al2O3

75-85%

Transport Package

25kgs/Bag

Specification

16-325#

Trademark

Black corundum

Origin

China

HS Code

28181090

Production Capacity

5000t/Years

Key features

High Hardness & Self-Sharpness: Mohs hardness of 8.5 with excellent self-sharpening properties for efficient grinding.

Low Heat Generation: Generates low grinding heat, preventing workpiece surface burning during polishing.

Cost-Effective Alternative: Lower production cost compared to brown, white, and calcined brown corundum.

Stainless Steel Specialist: Ideal for grinding and polishing stainless steel, ordinary steel, glass, and bamboo.

Versatile Applications: Used for wear-resistant anti-slip roads, resin abrasives, and coated abrasives.

Customization Available: Supports customization from samples, designs, and flexible minor adjustments.

Company profile

High Repeat Buyers Choice

Zhengzhou Shanjie District Qianjiaxin New Material Firm

Henan, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 year CertifiedNearest Port: Qingdao PortAverage Response Time: ≤9.22h

AI-Powered supplier vetting

SummaryZhengzhou Shanjie District Qianjiaxin New Material Firm is a China-based private limited company described as both a trading company and manufacturer/factory, offering brown aluminium oxide, precoated sand, and zircon sand. It reports corundum productivity of 1,000 tons and lead times of within 15 workdays off-season and one month during peak season. The supplier holds ISO 9001 certification and reports six to ten quality-control staff and six to ten R&D engineers. It also states that it provides multiple forms of customization. However, the available information identifies significant management and sustainability gaps: no approved-supplier list, written corrective-action or complaint-handling procedures, quality assurance, raw-material traceability, environmental impact assessment report, or new products launched during the previous year. Financial information is represented only by reporting years, without substantive performance evidence.

Supplier typeThe supplier is identified as a private limited company in China, with its business type described as both a trading company and manufacturer/factory in one record and as a trading company in another. Its stated scope includes sales of non-metallic minerals, refractory products, casting materials, and related products, indicating a mixed trading and manufacturing-related profile.

CertificationsThe supplier reports ISO 9001 certification, and an SGS audit record covers the supplier from February 25, 2025 through February 24, 2026. However, the audit evaluation result is recorded as 0 without an interpretation, so the available evidence confirms certification and audit documentation but does not establish the audit performance level.

After-Sales capabilityThe supplier explicitly reports no written procedures or records for corrective and preventive actions and no written procedures or records for effective customer complaint handling. Although it describes product tracking and quality control activities, these do not demonstrate an established after-sales service system.

Production capacityThe supplier reports corundum productivity of 1,000 tons, six to ten quality-control staff, and production output information of 1,000 tons of corundum. It also states lead times of within 15 workdays during off-peak periods and one month during peak periods, supporting a stated production and fulfillment capability.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization. This is direct evidence of broad customization services.

Product Q&A

Q:What is the main chemical composition of black corundum?

The main chemical composition is aluminum oxide (Al2O3), iron oxide (Fe2O3), and some silicon dioxide (SiO2), titanium dioxide (TiO2), and other components.

Q:What are the advantages of using black corundum?

It has moderate hardness, good self-sharpness, low grinding heat generation, and is not easy to burn the workpiece surface. It is also more cost-effective than other common abrasives.

Q:What materials can be processed with black corundum?

It is mainly used for various stainless steel, ordinary steel, bamboo, glass, and other workpieces, especially for grinding and polishing stainless steel.

Q:What is the Mohs hardness of this black corundum?

The Mohs hardness is 8.5.

Q:What is the Al2O3 content in this product?

The Al2O3 content ranges from 75% to 85%.