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Spheroidal graphite cast iron ring

      Properties

Thanks to its higher content of Ni and Mo alloys, pearlite, basinite and martensite matrixes with excellent performance are produced. The graphite si spherical form, demonstraing good heat transfer property and high tensile strength. Through changing the struture into basinite of marensite matrix, chemical compostion of needly-like spherical iron of heat treatment, a dense reticular primary cementite with high wear-resistance is produced

                                                                      Centrifugal                                                              static

  pearlitic                                                      bainitic

       Mechanical properties

Hardness of shell
HSD45-80
Hardness of core
HSD32-55
Tensile Strength of core
320MPa

 

 

      Chemical analysis

Grade
Hardness (HSD)
C
Si
Mn
Ni
Cr
Mo
Mg
SG IV
55-70
2.9/3.6
0.8/2.5
0.4/1.2
0.5/4.0
0.2/0.6
0.2/0.8
0.04
SG V
60-70
2.9/3.6
0.8/2.5
0.4/1.2
1.0/3.0
0.3/1.2
0.2/0.8
0.04
SGP I
45-55
2.9/3.6
1.4 /2.2
0.4/1.0
1.5/2.0
0.1/0.6
0.2/0.8
0.04
SGP II
55-65
2.9/3.6
1.2 /2.0
0.4/1.0
2.0/2.5
0.2/1.0
0.2/0.8
0.04
SGP III
62-72
2.9/3.6
1.0 /2.0
0.4/1.0
2.5/3.0
0.2/1.2
0.2/0.8
0.04
SGA I
55-78
2.9/3.6
1.2 /2.2
0.2/0.8
3.0/3.5
0.2/1.0
0.5/1.0
0.04
SGP II
60-80
2.9/3.6
1.0 /2.0
0.2/0.8
3.5/4.5
0.3/1.5
0.5/1.0
0.04

 

 

      Applications

       Various types of continuous rough  intermediate and finish mills for processing bars, sections and strips. Used as the secondary finishing and back rolls. Also suitable for use on stainless-steel strip hot mills.

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