High chromium Steel Is a good performance and special attention to the anti-wear materials. It is much higher than the alloy steel wear resistance, and much higher than the general white cast iron toughness, strength, while it also has good resistance to high temperature and corrosion resistance, combined with convenient production, cost is moderate, and was Known as the contemporary one of the best anti-abrasive wear materials.

Material Properties

Chromium Steel Grades and Chemical Composition

Grades	C	Mn	Si	Ni	Cr	Mo	Cu	P	S
KmTBCr12	2.0-3.3	≤2.0	≤1.5	≤2.5	11.0-14.0	≤3.0	≤1.2	≤0.10	≤0.06
KmTBCr15Mo	2.0-3.3	≤2.0	≤1.2	≤2.5	11.0-18.0	≤3.0	≤1.2	≤0.10	≤0.06
KmTBCr20Mo	2.0-3.3	≤2.0	≤1.2	≤2.5	18.0-23.0	≤3.0	≤1.2	≤0.10	≤0.06
KmTBCr26	2.0-3.3	≤2.0	≤1.2	≤2.5	23.0-30.0	≤3.0	≤1.2	≤0.10	≤0.06

Chromium Steel Hardness

Grades	As-cast				Softened Annealed State
Grades	HRC	HBW	HRC	HBW	HRC	HBW
KmTBCr12	≥46	≥450	≥56	≥600	≤41	≤400
KmTBCr15Mo	≥46	≥450	≥58	≥650	≤41	≤400
KmTBCr20Mo	≥46	≥450	≥58	≥650	≤41	≤400
KmTBCr26	≥46	≥450	≥56	≥600	≤41	≤400

America Climax Company Chromium Steel Casting Standard

Composition Grades	12-1	15-3				15-2-1	20-2-1
Composition Grades	12-1	Super C	High C	Mid C	Low C	15-2-1	20-2-1
C	3.0-3.5	3.6-4.3	3.2-3.6	2.8-3.2	2.4-2.8	2.8-3.5	2.6-2.9
Cr	11-14	14-16	14-16	14-16	14-16	14-16	18-21
Mo	0.5-1.0	2.5-3.0	2.5-3.0	2.5-3.0	2.4-2.8	1.9-2.2	1.4-2.0
Cu	<1.0	–	–	–	–	0.5-1.2	0.5-1.2
Mn	0.5-0.8	0.7-1.0	0.7-1.0	0.5-0.8	0.5-0.8	0.6-0.9	0.6-0.9
Si	0.5-0.8	0.3-0.8	0.53-0.8	0.3-0.8	0.3-0.8	0.4-0.8	0.4-0.9
S	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05
P	<0.10	<0.10	<0.10	<0.10	<0.10	<0.06	<0.06
mm		–	70	90	120	200①	>200
Hardness (HRC)	As-cast	60-67	51-56	50-54	44-48	50-55	50-54
	Quenching		62-67	60-65	58-63	60-67	60-67
	Annealing		40-44	36-42	35-40	40-44	38-43

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