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non magnetic retaining ring for turbine generator
non magnetic retaining ring for turbine generator

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non magnetic retaining ring for turbine generator (18Mn18Cr) is customized which can be rough machining or finish machining.

1-      chemical composition

As per standard of GB/T 223.3-78 Steel/iron and alloy chemolysis method

Material/%

C

Mn

Si

P

S

Cr

Al

N

B

1Mn18Cr18N

≤0.12

17.50-20.00

≤0.80

≤0.050

≤0.015

17.50-20.00

≤0.030

≥0.47

≤0.001

2-     As per standard of ASTM A342-1995 Standard Test Methods for Permeability of Feebly Magnetic Materials

4-     metallographic  tests. As per standard of ASTM E112:1981 (eqv.  YB/T 5148-1993) Standard Test Methods for Determining Average Grain Size

5-      mechanical  properties. As per standard of ASTM A370-1997 Standard Test Methods and Definitions for Mechanical Testing of Steel Products; As per standard of ASTM E112:1981 (eqv.  YB/T 5148-1993) Standard Test Methods for Determining Average Grain Size; As per standard of ISO738:1989 (eqv. GB/T 4338-1995) Metallic materials-Tensile testing at elevated temperature

6-      non-destructive  tests, As per standard of ASTM A531-1974 (eqv. JB/T 4010-1985) Standard Practice for Ultrasonic Examination of Turbine-Generator Steel Retaining Rings; As per standard of ASTM E165-1995 Standard Test Method for Liquid Penetrant Examination

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