An introduction of our high chrome white iron alloy

We are specialized in casting metals specified in ASTM A532 system; besides, we expanded its range wider to meet the requirements of tougher applications that the metals involved ASTM A532 cannot handle.

These metals are a group of alloys that in which high-hardness carbide scatter in the high-strength matrix. The hard spots protect the matrix (mostly martensite structure) during abrasion. At the same time, the high-strength matrix firmly grasps the hard spots so that they are not easily to peel off, thereby making high-chromium cast iron shows higher abrasion resistance in the applications of the mining, milling, earth-handling, and manufacturing industries.

In FoundryMan, we engineered the castings that Chromite account for 11-35%, Carbon account for 2.0-3.6% (by weight). Based on your requirements and feedback we choose or engineer alloy that meets your applications, In doing so we maximize your run-time and reduce the downtime, furthermore can cast to finished size and/or fully machine your components.

FoundryMan regular alloys are specified as below, you can choose one or more of them according to their suitable applications.

Our HCWI materials

Alloy code: SD05(ASTM A532 Class III Type A)
C% by wt.: 2.3~3.3
Cr% by wt.: 26-28
Microstructure (as cast): Eutectic carbide + austenite
Hardened Microstructure: Eutectic carbide + secondary carbide + martensite + retained austenite
Hardness（HRC）:≥58
Impact (J/cm2): 5~7
Has excellent performance under erosive conditions. It is effectively used in a wide range of slurry types. It can be divided into 3 types with different hardness, they are particularly suited to applications where mild corrosion resistance, as well as erosion resistance is required.

Alloy code: SD07
C% by wt.: 2.3~3.3
Cr% by wt.: 14~18
Microstructure (as cast): Eutectic carbide + austenite
Hardened Microstructure: Eutectic carbide + secondary carbide + martensite + a small amount of retained austenite
Hardness（HRC）:≥58
Impact (J/cm2): 5~7
Compared with SD05, the abrasiveness is slightly lower, the erosion resistance is good, and its value is easier to play under the condition of low wear.

Alloy code: SD12
C% by wt.: 4.0~5.5
Cr% by wt.: 30~40
Microstructure (as cast): Eutectic carbide + austenite + martensite
Hardened Microstructure: Eutectic carbide + austenite + martensite
Hardness（HRC）: 60~67
Impact (J/cm2): 2
It has higher wear resistance than SD05, but not corrosion resistant. Can be used for PH value 6~14 working conditions where SD05 performance cannot be satisfied.

Alloy code: SD33
C% by wt.: 1.8~2.3
Cr% by wt.: 30~40
Microstructure (as cast): Eutectic carbide + ferrite
Hardened Microstructure: Eutectic carbide + secondary carbide + ferrite
Hardness（HRC）: 30~40
Impact (J/cm2): 5~7
Has certain erosion resistance and corrosion resistance, used for oxidizing slurry with PH ≥ 1, such as Conveying phosphogypsum, nitric acid, sulfuric acid, phosphoric acid and other media.

Alloy code: SD49
C% by wt.: 1.3~1.8
Cr% by wt.: 23~30
Microstructure (as cast): Eutectic carbide + ferrite + austenite
Hardened Microstructure: Eutectic carbide + secondary carbide + ferrite + austenite
Hardness（HRC）: 35~45
Impact (J/cm2): 5~7
Has certain erosion resistance and good corrosion resistance, used for Weakly acidic environment with PH≥ 4, especially suitable for flue gas desulfurization devices in thermal power plants.

Alloy code: SD61
C% by wt.: 3-5
Cr% by wt.: 30~35
Microstructure (as cast): A fine dispersion of hard primary iron/chromium carbides, surrounded by a eutectic matrix
Hardened Microstructure: eutectic iron/chromium carbides +secondary carbides and martensite
Hardness（HRC）: ≥62
Impact (J/cm2): 5~7
Alloy SD61 is a hypereutectic white iron, suitable for high wear duties where corrosion is not severe. It is a good option when SD05 and SD12 cannot provide an adequate wear life. It can transport medium with PH range of 6 ~ 14. The alloy may provide up to 3 times the life of SD05 and SD12 parts.