Manganese Castings

Manganese Castings (HATFIELD STEEL): A work hardening cast steel containing 12 to 14% manganese.

We also offer alternatives to manganese see boron steel  below

The Advantages of Boron Steel

The comparison of Boron grade steels versus Hadfield (11-15% Mn) and martensitic white cast iron are listed below:

86B30 Hadfield Martensitic

White Iron

Tensile                                               204-256 KSI                        N/A                            N/A

Yield                                                   170-200 KSI                        N/A                            N/A

% Elongation                                    3 – 4                                    N/A                            N/A

% Reduction of Area                       6 – 5                                    N/A                            N/A

Hardness                                           (415-515)                            N/A                       550 BHN Min.

The physical property comparison above illustrates some of the advantages of Boron Steel versus Hadfield and White Irons. Hadfield steels and white irons do not require physical properties per ASTM specifications other than a hardness minimum for white iron. Boron steel properties illustrate good wear ability characteristics as well as some ductility which will reduce breakage due to impact stress as well as compression and tension stress.

Other advantages of Boron steel as opposed to Hadfield or white iron are:

1. Less cracking possibility during use.
2. Improved ductility.
3. Consistent heat treated microstructure.
4. Good weldability
5. Similar wearability
6. Hardfacing not required.
7. Boron steel has allowed the steel casting industry to pursue casting applications in wear resistant and abrasion-type casting working environments. Boron does not increase the surface hardness of a casting, but increases the depth of hardness which is a critical area on wear items such as crushing hammers or ground engaging tools.

All wear resistant or abrasion resistant steels and cast irons must be composed of a martensitic grain structure prior to the casting being placed in use. The past problem with steel has not been the surface hardness, but rather the core hardness. The result would be good wear characteristics during early use of the casting but once the martensitic layer was worn off, the corresponding microstructure would wear or abrade rapidly. Boron has increased the depth of martensite (or casting core hardness) which subsequently has increased the casting working life such that Boron steels can now substitute for Hadfield steel or white iron with comparable results. The above fact plus prior listed advantages makes Boron steel grades a good choice for wear or abrasion resistant applications.