Mn13Cr2 Mn18Cr2 Mn22Cr2 ihe nkedo agba nhịhịa efere.

Ihe onwunwe: Mn13Cr2( akara ule M1 nhata), Mn18Cr2(M2 akara ule), wdg.

Usoro nrụpụta nkedo:

1,Ịwụsa mmiri ígwè a wụrụ awụ n'ime pattems

2,The mara-how Ht (okpomọkụ na oge na-achịkwa) ọgwụgwọ okpomọkụ

3,Iji mee nkedo High Chrome ma ọ bụ manganese dị elu dịka eserese ahụ si dị.

4,Ọgwụgwọ imenyụ mmiri

5,Na-egweri elu

6,Nyocha dị mma (nleba anya akụkụ, nyocha ike siri ike, nhazi metallographic, wdg)

7,Mechaa ngwaahịa na-enweghị eserese

8,Mechaa ngwaahịa na eserese n'ime akpa

Oge ndu: 25-35days.

Ngwa: Ụlọ ọrụ ciment, coal chụrụ n'ọrụ ike ụlọ ọrụ, Ngwuputa ụlọ ọrụ, metallurgy, mgbawa ụlọ ọrụ