Range of Material Specifications for Rings

STD C.I.- MPR-211

Matrix : fine Pearlite uniformly distributed phosphide eutectic

Hardness : 94~107 HRB

Breaking Strength : 350n / mm2 Min.

Modulus of Elasticity : 8500~11000 kg / mm2

Wear Properties (uncoated) : 1.5

ALLOY C.I.- MPR-235

Matrix : Tempered Martensite.

Hardness : 108~114 HRB

Breaking Strength : 500n / mm2 Min.

Modulus of Elasticity : 10000~13000 kg / mm2

Wear Properties (uncoated) : 3.0

ALLOY C.I.- MPR 422 (MALLEABLE IRON)

Matrix : Fine Pearlite 20% well dispersed fine carbides .

Hardness : 104~111 HRB

Breaking Strength : 820n / mm2 Min.

Modulus of Elasticity : 12000~14000 kg / mm2

Wear Properties (uncoated) : 3.7

CARBIDIC CAST IRON (MPR 223)

Matrix : Tempered Martensite + free distributed carbides

Hardness : 109~116 HRB

Breaking Strength : 650n / mm2 Min.

Modulus of Elasticity : 13000~16000 kg / mm2

Wear Properties (uncoated) : 4.0

NODULAR IRON MPR-231

Matrix : Tempered Martensite, Isolated Carbide Accepted.

Hardness : 104~112 HRB

Breaking Strength : 1725n / mm2 Min.

Modulus of Elasticity : 14500~18500 kg / mm2

Wear Properties (uncoated) : 2.75

NODULAR IRON MPR-234

Matrix : Tempered Martensite, Isolated Carbide Accepted.

Hardness : 104~112 HRB

Breaking Strength : 1300n / mm2 Min.

Modulus of Elasticity : 14500~18500 kg / mm2

Wear Properties (uncoated) : 2.5

NODULAR IRON MPR-232 A

Matrix : Tempered Martensite, Isolated Carbide Accepted.

Hardness : 109~116 HRB

Breaking Strength : 1725n / mm2 Min.

Modulus of Elasticity : 14500~18500 kg / mm2

Wear Properties (uncoated) : 3.5