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The material we are seeking is Pearlitic CrMo cast steel to the following specification.
5 d! [0 N9 _; O" w9 e; c8 @# F0 K3 `0 R. \3 `$ ~5 C
%C 0.6 ~ 0.89 S" j% w5 h6 g4 R! x6 `2 {2 B2 h
%Si 0.75 max
1 l! M# j$ I: v1 I# l6 k Z%P 0.05 max
' O$ W/ v# e% p; f6 W. }% R%S 0.03 max! C& b8 Y1 L& ?! j8 D
%Ni 0.3 max
q/ C" X' @: r4 O3 D7 I%Cr 2.0 ~ 2.4
% E, t4 q1 C, n( Q4 z1 `%Mo 0.2 ~ 0.4. k- j+ Q& |+ U) _. K: ^0 y
%Cu 0.25 max8 V5 _- X' {3 Y/ o% c
%Al 0.05 max
* N& ?; s9 E1 X% b; [8 b& U' i%Fe balance
+ r* u7 c$ a8 |' Q% k( s7 G
7 Q& l$ d) a% QCondition is normalised and tempered.
, B8 s: f" w: e `Hardness range is 33~42 HRC with the target 37 HRC.
) L+ Q3 p/ E/ s# \5 l1 n1 y0 z" _1 P8 L2 I5 O- ]* Q8 W7 W
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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