Discuss the roles/effects of these alloying elements in the 300M steel, the 18Ni steel and the PH13-8Mo steel.

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24 Terms

1
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300M C

Strengthen martensite

2
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300M Ni

Increase hardenability (HA)

3
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300M Cr

Increase hardenability

4
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300M Mo

Increase hardenability & GR

5
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300M V

GR

6
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300M Si

Inhibit forming cementite

7
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300M Al

Not present

8
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300M Co

Not present

9
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18Ni C

Not Present

10
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18Ni Ni

Increase HA form Ni3Mo and Ni3Ti

11
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18Ni Cr

Not present

12
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18Ni Mo

form Ni3Mo and Fe2Mo and reduce GB precipitates

13
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18Ni V

Not Present

14
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18Ni Si

Not Present

15
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18Ni Al

Form Ni3Al

16
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18Ni Co

Increase Ms point and lower the solubility of Mo in M

17
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PH13- 8Mo C

Not present

18
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PH13- 8Mo Ni

Maintain A and form Ni3Al, Ni3Ti, Ni3Mo

19
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PH13- 8Mo Cr

Form Cr2O3

20
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PH13- 8Mo Mo

Form Ni3Mo and other intermetallics

21
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PH13- 8Mo V

Not present

22
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PH13- 8Mo Si

Not present

23
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PH13- 8Mo Al

Form Ni3Al

24
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PH13- 8Mo Co

Not present