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The material we are seeking is Pearlitic CrMo cast steel to the following specification.% N7 x0 a g0 c( j& C. _, k
8 ?+ S( F* g- u- d3 @%C 0.6 ~ 0.8
' x9 n7 X+ P: X- l%Si 0.75 max
0 f% P7 N# r1 _* `+ q5 Q; @7 d%P 0.05 max
* M: }3 \6 u0 j%S 0.03 max; q, F1 Z' S: z# J
%Ni 0.3 max0 s% q! l9 Y* R+ `
%Cr 2.0 ~ 2.4
& e. D, o2 P- f1 o%Mo 0.2 ~ 0.4
( I1 L i- I8 n7 w, w) Z# E%Cu 0.25 max# {, S; m$ V! \7 B _, C/ k
%Al 0.05 max) D) {6 z2 b, G7 x8 l9 X7 l
%Fe balance" b2 B! F9 v5 D, m4 ], X
8 Y- K8 T; l2 {! e3 q0 XCondition is normalised and tempered.! S3 ~, X- A& J: O
Hardness range is 33~42 HRC with the target 37 HRC.0 M( q2 I4 J- t% K6 e9 V$ E$ A, _
1 ]9 c3 C2 l# m5 @' n" W9 i2 n
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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