50Mn18Cr4WN Retaining Rings

50Mn18Cr4WN Retaining Rings

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1. Key component:

Nonmagnetic retaining ring is a critical component of heavy turbonator, one of the components bearing the highest stress, and by means of the retaining ring the centrifugal force is borne on the location of turning of the coil block on the both ends of the rotor.

2. Characteristics:

The retaining ring is hot assembled on the both ends of the rotors to compact the coils on the ends to prevent the coils of rotors during high speed operation from runaway damages which might cause disastrous accidents to the power stations.

3.Grades:

Unique heavy retaining ring presses are available and by them all the retaining rings with the specifications such as 3 MW – 1,000 MW grades are able to be manufactured.

4. Chemical Composition

STEEL GRADE

 C

 Si

 Mn

 P

 S

 Cr

 N

 Al

 50Mn18Cr5

 0.40-0.60

 0.30-0.80

 17.00-19.00

 ≤0.060

 ≤0.025

 3.50-6.00

-

 -

 50Mn18Cr5N

 0.40-0.60

 0.30-0.80

 17.00-19.00

 ≤0.060

 ≤0.025

 3.50-6.00

≥0.08

 -

 50Mn18Cr4WN

 0.40-0.60

 0.30-0.80

 17.00-19.00

 ≤0.060

 ≤0.025

 3.50-6.00

 ≥0.08

 -

 1Mn18Cr18N

 ≤ 0.80

 ≤ 0.80

 17.50-20.00

 ≤0.050

 ≤0.015

 17.50-20.00

 ≥0.08

 ≤0.030

5, Mechanical Properties

Item

I

II

 III

IV

V

Tensile strength Rm(MPa)

 ≥895

 ≥965

≥1035

 ≥830

≥900

yield strength Rp0.2(Mpa)

 ≥760

≥825

 ≥900

790-970

 900-1030

elongation δ4(%)

 ≥25

≥20

 ≥20

 ≥21

 ≥19

rate of reduction cross ψ(%)

 ≥35

 ≥30

 ≥30

 ≥62

 ≥62

 夏比V型冲击功Akv,ISO,J

 -

 -

 -

 ≥122

 ≥102

 

6, Manufacturing Workflow

13-14

Send us your inquiry with drawing, we will give you our offer ASAP!

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