AbrecoⓇ produces a wide range of high alloy steel and cast iron for adhesive and abrasive wear conditions. Our alloys have been designed and modified to increase wear resistance as well as increase their fracture toughness under heavy frequency load.
High chromium white cast iron class I, II, III according to ASTM-A532
The main factor for durability of hard materials in wear applications is the fracture toughness. AbrecoⓇ modified high chromium cast iron against traditional high chromium cast iron (HCCI) has fine and discrete chromium carbide distribution in the martensitic matrix which increases fracture toughness and abrasion resistance. AbrecoⓇ produces high chromium cast iron according to ASTM-A532 alloys.
Standard chemical composition of High Chromium Cast Iron (ASTM-A532)
| Class | Type | Designation | Carbon | Manganese | Silicone | Nickle | Chromium | Molybdenum | Copper | Phosphorus | Sulfur |
|---|---|---|---|---|---|---|---|---|---|---|---|
| I | A | Ni-Cr-Hc | 2.8-3.6 | 2.0 max | 0.8 max | 3.3-5.0 | 1.4-4.0 | 1.0 max | ... | 0.3 max | 0.15 max |
| I | B | Ni-Cr-Lc | 2.4-3.0 | 2.0 max | 0.8 max | 3.3-5.0 | 1.4-4.0 | 1.0 max | ... | 0.3 max | 0.15 max |
| I | C | Ni-Cr-GB | 2.5-3.6 | 2.0 max | 0.8 max | 4.0 max | 1.0-2.5 | 1.0 max | ... | 0.3 max | 0.15 max |
| I | D | Ni-HCr | 2.0-3.3 | 2.0 max | 2.0 max | 4.5-7.0 | 7.0-11.0 | 1.5 max | ... | 0.10 max | 0.15 max |
| II | A | 12% Cr | 2.0-3.3 | 2.0 max | 1.5 max | 2.5 max | 11.0-14.0 | 3.0 max | 1.2 max | 0.10 max | 0.06 max |
| II | B | 15% Cr-Mo | 2.0-3.3 | 2.0 max | 1.5 max | 2.5 max | 14.0-18.0 | 3.0 max | 1.2 max | 0.10 max | 0.06 max |
| II | D | 20% Cr-Mo | 2.0-3.3 | 2.0 max | 1.0-2.2 | 2.5 max | 18.0-23.0 | 3.0 max | 1.2 max | 0.10 max | 0.06 max |
| III | A | 25% Cr | 2.0-3.3 | 2.0 max | 1.5 max | 2.5 max | 23.0-30.0 | 3.0 max | 1.2 max | 0.10 max | 0.06 max |
Ductile Cast Iron:
The spherical shaped graphite in the cast iron makes Ductile cast iron have high ductility and high mechanical properties.
The main types of nodular cast iron for high and low stress wear condition are:
Nodular Ferritic Ductile cast iron, with a combination of ferrite and pearlite in the matrix and limited free carbide content provides good mechanical properties. Nodular Pearlitic Ductile cast iron, with a pearlitic matrix and content of cementite carbide along with alloy carbides have good wear and mechanical properties. Nodular Acicular Ductile cast iron, these are a special type of cast irons with pearlite and bainite matrix and contain free alloy carbides that can be obtained with either cooling a casting or through isothermal heat treatment. Heat treated Nodular Acicular cast iron with martensitic matrix has higher hardness and excellent wear resistance. The main difference between the Austempered Ductile Iron and Acicular Ductile Iron is that Acicular cast iron can be supplied as-cast without heat treatment. Ductile cast iron produced according to: ASTM A395: Standard Specification for Ferritic Ductile iron pressure retaining casting for elevated Temperature: Grades 60-40-18, 65-45-15 ASTM A439: Standard Specification for Austenitic Ductile iron casting: Types D-2, D-2B, D-2C, D-2S, D-3, D-3A, D-4, D-5, D-5B, D-5S ASTM A536: Standard Specification for Ductile Iron casting: Grade: 60-40-18 Grade: 65-45-12 Grade: 80-55-06 Grade: 100-70-03 Grade: 120-90-02
Austempered Ductile Iron (ADI) and Carbidic Austempered Ductile Iron (CADI):
Austempered Ductile cast irons (ADI) with ausferrite microstructure provides excellent wear properties for adhesive wear. The Carbidic Austempered cast iron (CADI) is the new generation of ADI cast iron to enhance the adhesive wear resistance of cast iron for a wide range of applications in the machinery equipment industry. Canadian Wear Technologies provides these grades of CADI for equipment that is exposed to wear conditions with high toughness and mechanical properties in these grades according to ASTM A897.
| Grade 850/550/10 | Grade 1050/700/7 | Grade 1200/850/4 | Grade 1400/1100/1 | 1600/1300/- | |
|---|---|---|---|---|---|
| Tensile strength, min, MPa | 850 | 1050 | 1200 | 1400 | 1600 |
| Yield strength, min, MPa | 550 | 700 | 850 | 1100 | 1300 |
| Elongation in 50 mm, min, % | 10 | 7 | 4 | 1 | ...A |
| Impact energy, J | 100 | 80 | 60 | 35 | ...A |
| Typical hardness, BHN, kg/mm | 269-321 | 302-363 | 341-444 | 388-477 | 444-555 |
Grey Cast Iron
Gray iron is a group of cast iron exhibits a grey fracture surface because fracture occurs along the lamellae or flake graphite. The unique lamellae graphite shape in the matrix provides high thermal conductivity, good machinability and excellent vibration damping properties.
Alloyed and unalloyed Grey cast iron produced according to:
ASTM A48: Class 20, 25,30,35, 40, 45,50, 55, 60
ASTM A126: Standard Specification for Gray iron casting for valves, flanges and pipe fitting.
ASTM A159: Automotive Gray iron casting, Grades: 1800, 2500, 3000, 3500, 4000
ASTM A436: Standard Specification for Austenite Grey cast iron, Type 1 to Type 6
ASTM A319: Standard Specification for Grey cast iron for elevated temperatures for non-pressure containing parts: Type A, B, C, D
ASTM A278: Standard Specification for Grey cast iron for pressure containing parts for temperatures up to 350°C
Steel Alloys:
Martensitic Modified Stainless Steel for Wear and Corrosion Applications:
AbrecoⓇ produces a wide range of the high chromium martensitic steel for wear applications. High volume of toughed chromium carbides with fine martensitic structure makes these alloys hard and tough for wear applications.
AISI 410: X12Cr13
AISI 420: X20Cr13
AISI 440A: X70CrMo15
AISI 440B: X90CrMoV18
AISI 440C: X105CrMo17
Weldable Alloy Steels for High Stress / Low Wear Applications:
AbrecoⓇ designs a wide range of TRIP (Transformation Induced Plasticity) alloy steels used for wear applications and high impact applications when regular cast iron does not suffice. These steels are specifically manufactured for high stress / low wear conditions and they are fully weldable to low and medium carbon steel. The service life of these alloys in high stress load conditions is more than high chromium steel which is more likely to fracture in similar applications.
These steel alloys have high weldability and can be easily installed in the field with SMAW, MIG methods using all grades of steel wire and electrodes suitable for structural steel such as 6013 and 7018.
