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The material we are seeking is Pearlitic CrMo cast steel to the following specification./ k. e; A0 t4 [) k: h9 V- C
! M6 b# Q& b l& f2 P%C 0.6 ~ 0.8
' g+ f" A0 ?. R* Y9 W) S5 M%Si 0.75 max
% [" L4 P4 N, {0 v: j%P 0.05 max% {: u1 r; d2 f6 c3 l' ]4 k
%S 0.03 max4 k0 S5 B; K$ U \- V3 g
%Ni 0.3 max9 L$ n$ R, S+ g% y* O5 f
%Cr 2.0 ~ 2.4# F3 t0 d B3 g4 b* U
%Mo 0.2 ~ 0.4
! }6 y5 }/ D, L' k%Cu 0.25 max
! D5 J* v- l% R, X& V8 N [ E%Al 0.05 max
5 U8 {; B/ Q! v9 N. x( y%Fe balance( d5 Y7 T! {# K q* g1 C
% p) F8 a% Q7 i5 [Condition is normalised and tempered.9 u; i' e8 O9 z& z# E. X0 D
Hardness range is 33~42 HRC with the target 37 HRC.
0 p5 I$ a( ~. R. ?7 d* S
4 I6 q* v ~ ^3 v) U. y$ iCastings 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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