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The material we are seeking is Pearlitic CrMo cast steel to the following specification.1 h- N" G1 ^; ~
# [, z, q: r$ d7 T+ W
%C 0.6 ~ 0.8. d+ o* {4 y8 D+ V
%Si 0.75 max- V5 H+ b3 ]5 h0 u! ~- j- p0 P0 Q
%P 0.05 max
& @) S1 Y: a& u%S 0.03 max+ t s1 n$ P& e: W1 g& [ r# Z
%Ni 0.3 max3 x( F Y! }$ {; S( h8 [
%Cr 2.0 ~ 2.4
+ U g# e+ u9 ~. N- M# c' Q%Mo 0.2 ~ 0.47 O: ?! P8 `8 w. j3 j
%Cu 0.25 max2 J1 @$ Z# e5 b
%Al 0.05 max
; _, H: j5 G( i%Fe balance
/ a9 G' ^/ L7 a) \
* \2 Y, J$ e$ L1 A& K D3 \$ p7 k+ cCondition is normalised and tempered.
/ E1 J z3 a* R7 }" ^% THardness range is 33~42 HRC with the target 37 HRC.
& _% W* ^: |* {# O- j
* c D, Y3 e2 y+ P# S4 A" C- m' o- TCastings 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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