corundum price per carat

item

95

96 

97 

Al2O3 

≥95% 

≥96% 

≥97% 

SiO2 

≤1.2% 

≤1.0% 

≤0.8% 

TiO2 

≤3.2% 

≤3.0% 

≤2.0% 

Fe2O3 

≤0.3% 

≤0.2% 

≤0.2% 

CaO+ MgO 

≤0.6% 

≤0.5% 

≤0.4% 

Real demsity 

≥3.9 g/cm3 

Moh's hardness 

9.0 

Microhardness 

2000-2200KG/MM2 

Clarseness 

8-5MM   5-3MM   3-1MM   1-0MM 

16# 24# 30# 36# 46# 60# 70# 80# 90# 100# 120# 

Fines 

  180F   200F   240F   325F (Fe2O3 ≤0.50%) 

Product name

Energy saving and environmental protection with black corundum , black emery

Model No

BA-46#

Brand name

BA,CHINA

Description

The black corundum is made from the high quality aluminum, iron and other trace elements fused in the arc furnace, forming the black crystal.

Advantage

• high toughness,
• high temperature resistance
• stable thermal property
• strong cutting ability
• durability
• high work efficiency.

Parameter

• The color: black
• The shape: particle in trigonal shape
• Melt point:2050°C
• The max temperature:1850°C
• True density(g/cm3): ≥3.50
• Coefficient of linear expansion(0-1600°C): 7-9

Usage

• it is used for the bicycle, motorcycle, sewing machine, and clock parts
• light ornament, plastic and hardware polishing, and also applicable to the sand blasting.
• the production materials: manufacturing resin-cutting slice, edges and corners grinding and coated abrasives.
• the black corundum particle and micro powder are suitable for stainless steel work piece polishing and abrading and making the whetstone and polishing paste.
• Black corundum sand is the preferred material of the slip-prevented road and coal pits warehousing

Shipping way

By sea, by air, by express

Delivery time

Within 7 days from the receipt of payment

Loading seaport

Shenzhen

Package

25kg/bag with woven bag, 40bags per pallet

Price term

FOB Shenzhen, CFR,, CIF, FCA, EXW ect

Payment term

100% T/T in advance(negotiation)