prescribed in Table 1for that class and type.
6.2Spectrographic,X-ray,or wet chemical laboratory tech-
niques are acceptable for routine and control determinations,
but shall be standardized against,and give essentially the same
results as,the umpire methods specified in 6.3of this specifi-
cation.
6.3In case of dispute,umpire determinations of the chemi-
cal analysis of the metal shall be made using ASTM standard
methods detailed as follows:
6.3.1The following is in accordance with Test Methods
E 351:
6.3.1.1Carbon,Total by the Combustion Gravimetric
Method.
6.3.1.2Chromium by the Poroxydisulfate-Oxidation Titri-
metric Method.
6.3.1.3Copper by the Sulfide Precipitation-
Electrodeposition Gravimetric Method.
6.3.1.4Manganese by the Peroxydisulfate-Arsenite Titri-
metric Method.
6.3.1.5Nickel by the Dimethylglyoxime Gravimetric
Method. 6.3.1.6Phosphorus by the Molybdenum Blue Photometric Method.6.3.1.7Sulfur by the Combustion-Iodate Titration Method.6.3.2The following is in accordance with Test Methods E 350:6.3.2.1Molybdenum by the Photometric Method.7.Microstructure 7.1The alloys covered by this specification are expected to have microstructures that consist essentially of carbides,mar-tensite,bainite,austenite;and in exceptional cases minor amounts of graphite or pearlite.7.2The microstructure will not be routinely determined nor reported except in accordance with special agreement between the manufacturer and the purchaser,or in cases of dispute.8.Hardness Requirements 8.1The castings shall conform to the hardness requirements specified in Table 2.8.2The hardness test shall be performed on the original surface of the casting or up to 1⁄8in.(3mm)below that surface.9.Hardness Method 9.1Perform the hardness test in accordance with one of the
following methods to be specified by the purchaser:
9.1.1Test Method E 10(Brinell)using a tungsten carbide
ball and 3000kgf load,
9.1.2Test Method E 18(Rockwell)using a diamond cone
penetrator,150kgf load,and the Rockwell C Scale,or
9.1.3Test Method E 92(Vickers).
10.Keywords
10.1abrasion resistant;alloyed cast iron;cast iron;white
cast iron
TABLE 1Chemical Requirements,Weight %Class
Type Designation Carbon Manganese Silicon Nickel Chromium Molyb-denum Copper Phos-phorus Sulfur I
A Ni-Cr-Hc 2.8–3.6 2.0max 0.8max 3.3–5.0 1.4–4.0 1.0max ...0.3max 0.15max I
B Ni-Cr-Lc 2.4–3.0 2.0max 0.8max 3.3–5.0 1.4–4.0 1.0max ...0.3max 0.15max I
C Ni-Cr-GB 2.5–3.7 2.0max 0.8max 4.0max 1.0–2.5 1.0max ...0.3max 0.15max I
D Ni-HiCr 2.5–3.6 2.0max 2.0max 4.5-7.07.0–11.0 1.5max ...0.10max 0.15max II
A 12%Cr 2.0–3.3 2.0max 1.5max 2.5max 11.0–14.0 3.0max 1.2max 0.10max 0.06max II
B 15%Cr-Mo 2.0–3.3 2.0max 1.5max 2.5max 14.0–18.0 3.0max 1.2max 0.10max 0.06max II
D 20%Cr-Mo 2.0–3.3 2.0max 1.0–2.2 2.5max 18.0–23.0 3.0max 1.2max 0.10max 0.06max III A 25%Cr 2.0–3.3
2.0max 1.5max 2.5max 2
3.0–30.0 3.0max 1.2max 0.10max 0.06max
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T h i c k n e s s L e v e l 1L e v e l 2H B H R C H V H B H R C H V H B H R C H V H B H R C H V H B H R C H V I A N i -C r -H i I B N i -C r -L o I C N i -C r -G I D N i -H i C I I A 12%C I I B 15%C r -M .I I D 20%C r -M .I I I A 25%C .
A 90%o f t h e m i n i m u m s u r f a c e h a r d n e s s l e v e l s h a l l b e m a i n t a i n e d t o a d e p t h o f 40%o f t h e c a s t i n g s e c t i o n ,w
i t h a n y s o f t e r m a t e r i a l b e i n g a t t h e t h e r m a l c e n t e r o f t h e c a s t i n g .A s a m p l i n g p r o c e d u r e s h o u l d b e e s t a b l i s h e d
b y a g r e e m e n t b e t w e e n t h e s u p p l i e r a n d t h e p u r
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editoriallyN o n -c h i l l e d a r e a s o f c a s t i n g s h a l l m e e t m i n i m u m h a r d n e s s o r s a n d c a s t r e q u i r e m e n t s .
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