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The material we are seeking is Pearlitic CrMo cast steel to the following specification.
1 C1 N% E" a- I! I/ C( n4 W$ e7 S& t" K/ U, z0 v2 o, w, i0 F
%C 0.6 ~ 0.8" i8 v' S! n H3 Y) l5 E
%Si 0.75 max
8 _! }2 ?' M* B" o, ^. N%P 0.05 max; {# P6 |4 `5 Y% Y+ h/ n* [7 f
%S 0.03 max
+ B# R; K! n' e- ~: `9 B%Ni 0.3 max
5 ?/ F$ D+ t% J1 W4 I- i8 f# z3 x%Cr 2.0 ~ 2.48 ^$ j: { X3 Q+ n
%Mo 0.2 ~ 0.4! k& P. [+ x5 X9 N7 X- G
%Cu 0.25 max
2 h( ~3 n4 F! x* u# i$ g7 A%Al 0.05 max
2 `( I. w. v* I%Fe balance
- y" ^; B, U- ]* g1 W/ l8 v, b2 M4 u" O1 B: \% S7 f
Condition is normalised and tempered.1 N' s8 @3 P! r4 \! w, _: v6 W+ p
Hardness range is 33~42 HRC with the target 37 HRC.
" V" d* G l" a* p3 S
' @ q5 _% j- \: J3 s1 LCastings 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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