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Technical Details

Wear is the Loss or Deterioration of thickness on industrial Equipments, due to the friction of Minerals, Cement, Slag, Urban Waste etc. in Coal Power Stations, Cement factories, Mining, Fertilizer Industries etc.

««« Following are the Causes of Wear »»»
  Cement Industries
  Mineral Processing Industries
» Mechanical Causes of Wear » FRICTION : Rubbing between two surfaces BMW Steels Ltd.
ABRASION : Removal of particles BMW Steels Ltd.
IMPACT : Cracks and Breaks BMW Steels Ltd.
» Other Causes HEAT : Reduction of hardness BMW Steels Ltd.
CHEMICAL : Deterioration of microscopic structure BMW Steels Ltd.


««« Un-Alloyed Iron »»»
Cast Iron
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Cast Iron BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
as per ASTM-A48 Class 20-60 High Low coefficient 0.9 to 1 times* High ** Medium
500 °C
-
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS (%) DENSITY
C Si Mn S P Ni Cr V Ti
180 BHN 0.3 MAX 0.75 MAX 0.5 - 1.5 0.06 0.06 TRACES TRACES - - 7.8 gm/cm³

Thickness minimum 12 mm.



Mild Steel
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Mild Steel BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
as per ASTM-A201 Grade A,B & C Low Low coefficient 1 times* Very High** Low
300 °C
-
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS (%) DENSITY
C Si Mn S P Ni Cr V Ti
180 BHN 0.3 MAX 0.75 MAX 0.5 - 1.5 0.06 0.06 TRACES TRACES - - 7.8 gm/cm³

Thickness minimum 6 mm.



««« Alloyed Iron »»»
Chrome Steel
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Chrome Steel BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
as per IS 4896 Low Low coefficient 4 - 6 times* High** Low
200 °C
Low
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS (%) DENSITY
C Si Mn S P Ni Cr V Ti
350 BHN 0.45 - 0.65 0.75 MAX 0.5 - 1 0.06 0.06 TRACES 0.8 - 1.5 - - 7.8 gm/cm³

Thickness minimum 16 mm.



Ni-Hard
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Ni-Hard BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
as per IS 4771 Medium Low coefficient 10 - 12 times* Medium** 550 °C -
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS (%) DENSITY
C Si Mn S P Ni Cr Mo Ti
550 BHN 2.7 - 3.3 1.5 - 2.2 0.3 - 0.6 0.15 MAX 0.3 MAX 4 - 6 8 - 10 0.5 MAX - 7.9 gm/cm³

Thickness minimum 20 mm.



««« Ceramics »»»
Basalt
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Basalt BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
Cast Basalt High Low coefficient 15 - 20 times* Low** 350 °C High
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS (%) DENSITY
Al2O3 SiO2 Fe2O3 / FeO CaO MgO K2O Na2O TiO2
7 - 8 MOH 14 50 12 12 10 4 4 3 3 gm/cm³

Thickness minimum 20 mm.



Alumina Ceramics
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
Alumina BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
Sintered Alumina Ceramic Very High Low coefficient 25 - 30 times* Medium** 1000 °C High
*In Comparison with Mild Steel: 1 time
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS ANALYSIS DENSITY COLOUR
08 - 09 MOH Al 2O3 87 - 90 % 3.2 - 3.4 gm/cm³  

Thickness minimum 10 mm. for mortar fixed and 15 mm for weld on tiles.



CBC
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE
CBC BMW Steels Ltd.
SLIDING
BMW Steels Ltd.
FRICTION
BMW Steels Ltd.
ABRASION
BMW Steels Ltd.
IMPACT**
BMW Steels Ltd.
HEAT
BMW Steels Ltd.
CHEMICAL
Chemically Bonded Ceramics Very High Low coefficient 15 - 20 times* Medium** 1200 °C High**
*In Comparison with Mild Steel: 1 time
*** for chlorides & sulphides
**ANGLE OF INCIDENCE - maximum recommendable -
depending on particle size of product being worn
Guidelines by BMW Steels Ltd. for WEAR RESISTANCE for guidance only, having been produced -
after selection of the product most appropriate to ORIGIN OF WEAR:
Abrasion, Impact, Heat, Chemical, etc.- from data obtained on visits to Factories.

HARDNESS Compressive Strength DENSITY Fraction Energy
07 - 08 MOH 1200 Kg / cm² 2.5 - 2.9 gm / cm³ 15,000 J / m²

Thickness minimum 05 mm.









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