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The material we are seeking is Pearlitic CrMo cast steel to the following specification.
; C$ P( `- L/ Z) c4 Z6 o' p* \& k$ B/ B/ T; m
%C 0.6 ~ 0.8) ]/ M- E& v. E; T: m( |' o1 z
%Si 0.75 max* \0 v+ k$ |# a
%P 0.05 max# w( Y f* k, [! ?+ b5 W" z; _
%S 0.03 max
5 ?0 j5 {% o( X. [/ ~%Ni 0.3 max" u. f6 x {( |3 q# i# U" k( l
%Cr 2.0 ~ 2.45 }! O- c. @( Y1 \% _$ J$ g
%Mo 0.2 ~ 0.41 T4 e' t3 c! q- l; q2 e
%Cu 0.25 max
$ i( M: T* q" I- ^6 S) q" N( x%Al 0.05 max
, ^1 L- m* l, a3 m3 _%Fe balance0 z# v" @% @! c. D9 B
( |: Y) u7 P3 h6 G
Condition is normalised and tempered.
0 Q# o; I6 P s4 h. A( ^Hardness range is 33~42 HRC with the target 37 HRC.5 l" x& J) [! ^3 d# X2 @
0 ]+ P0 Q; H$ z# g$ [9 C" T( P/ @Castings will be generally in the 15 to 35kg range. Production will need to be by some form of no-bake hard sand moulding. |
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