China Manufacturer Al2O3 85% Black Corundum for Polishing

manufacturer Al2O3 85% black corundum for polishing

Black aluminum oxide fused corundum is also known as low aluminum corundum. It is also a new type product of polishing material, and it is a dark gray crystal body made α-Al2O3 and ferropicotite as main ore in the electric arc furnace by smelting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.

Black Fused Alumina Chemcal Analysis

Chemical Composition (% by weight)

Range of Grits

Chemical Composition

Al2O3

SiO2

Fe2O3

TiO2

24#-100#

85

11

5.0

1.5-3.5

120#-200#

75-81

9-12

4-6

2-3

240#-280#

64

10

7.0

1.5-3.0

Black Fused Alumina physical properties

Hardness (Mohs) ≥ 9.0

Melting point (°C) 2050

The maximum temperature (°C) 1850

True Density (g/cm3) ≥ 3. 50

Linear expansion coefficient (0-1600 °C) 7-9

High content industry calcined black fused alumina Application

Application
1. Extremely hard, sharp, and durable abrasive
2. Angular shape and fairly high bulk density will produce a matte surface finish
3. Abrasive is generally reusable many times because of its hardness and durability
4. Anchor pattern creation prior to coating or bonding
5.Rust, scale, or other tough contaminant removal
6. Application must tolerate some metal removal
7. Used for grinding and lapping as well as abrasive blasting
Packing and shipping

Packing

1. 25 pvc bags

2. 25KGS PVC BAGS+1MT BIG BAG
3.1MT Big Bag+Pallet

4.25KGS PVC BAGS+Pallet

Packaging can be customized according to customer requirement

about us:
FAQ:
Q: Are you trading company or manufacturer ?
A: We are factory.So you do not have to worry about quality and price, we can guarantee the best quality and the most reasonable price
Q: How long is your delivery time?
A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples ? is it free or extra ?
A: Yes, we could offer the sample for free charge but do not pay the cost of freight.
Q: What is your terms of payment ?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact us as below:
Tel:0086-15713811776
Mobile:0086-15713811776