直径重量 Diameter/Weight 硬度Hardness 材质 (Material)		C45		60Mn					B2				B3					B6
		C:0.42-0.5, Si:0.17-0.37, Mn:0.5-0.8, Cr:≤0.25, P:≤0.035, S:≤0.035, Ni:≤0.25, Cu:≤0.25		C:0.55-0.65, Si:0.17-0.37, Mn:0.7-1.0, Cr:≤0.25, P:<0.04, S:<0.04, Ni:≤0.3, Cu:≤0.25					C:0.72-0.85, Si:0.17-0.37, Mn:0.7-1.0, Cr:0.4-0.6, P:≤0.025, S:≤0.025, Ni:≤0.02, Cu:≤0.02, Mo:0.01-0.06				C:0.58-0.66, Si:1.3-1.9, Mn:0.65-0.8, Cr:0.7-0.9, P:≤0.025, S:≤0.025, Ni:≤0.02, Cu:≤0.02, Mo:0.05-0.12					C:0.97-1.03, Si:0.2-0.3, Mn:1.0-1.1, Cr:0.5-0.6, P:≤0.025, S:≤0.025, Ni:≤0.05, Cu:≤0.06, Mo:≤0.02
Diameter 直径(MM)	Weight/PC 单重(kg)	Surface Hardness 表面硬度 (HRC)	Core Hardness 芯部硬度 (HRC)	Surface Hardness 表面硬度 (HRC)			Core Hardness 芯部硬度 (HRC)		Surface Hardness 表面硬度 (HRC)		Core Hardness 芯部硬度 (HRC)		Surface Hardness 表面硬度 (HRC)			Core Hardness 芯部硬度 (HRC)		Surface Hardness 表面硬度 (HRC)		Core Hardness 芯部硬度 (HRC)
20	0.033	55-58	55-58	58-62			58-62		60-64		60-64		62-65			62-65		62-65		62-65
25	0.064	55-58	55-58	58-62			58-62		60-64		60-64		62-65			62-65		62-65		62-65
30	0.111	55-58	45-55	58-62			55-60		60-64		60-64		62-65			62-65		62-65		60-65
40	0.261	55-58	40-55	58-62			55-60		60-64		58-62		62-65			60-65		62-65		60-65
50	0.512	55-58	40-45	58-62			50-55		60-64		58-62		62-65			60-65		62-65		60-65
60	0.883	55-58	30-35	58-62			40-45		60-64		56-60		62-65			60-65		62-65		60-65
70	1.402	53-56	30-35	58-62			40-45		60-64		55-60		61-63			60-65		61-63		60-65
75	1.73	53-56	30-35	58-62			40-45		60-64		55-60		61-63			58-63		61-63		58-62
80	2.092	53-56	30-35	58-62			40-45		59-63		50-55		60-65			58-63		61-63		58-62
90	2.98	50-55	25-30	58-62			30-35		57-61		45-49		60-65			58-63		61-63		58-62
100	4.087	48-52	25-30	57-61			30-35		56-60		44-48		60-65			58-62		61-63		58-62
110	5.44	48-52	25-30	57-61			30-35		55-60		40-45		58-64			53-60		61-63		55-60
120	7.062	48-52	25-30	57-61			30-35		55-60		40-45		56-63			53-60		61-63		55-60
125	8.008	48-52	25-30	57-61			30-35		55-60		38-42		56-63			54-61		61-63		55-60
130	9.008	48-52	25-30	57-61			30-35		55-60		38-42		56-63			50-55		61-63		50-55
140	11.25	48-52	25-30	57-61			30-35		55-60		38-42		56-63			50-55		61-63		50-55
150	13.83	48-52	25-30	57-61			30-35		55-60		38-42		56-63			50-55		61-63		50-55
冲击值 Impact		≥12Ak.J/cm2		≥12Ak.J/cm2					≥12Ak.J/cm2				≥15Ak.J/cm2					≥15Ak.J/cm2
跌落次数 Drop Test		>10000		>10000					>10000				>12000					>12000
公称直径 Diameter		20mm	25mm	30mm	40mm	50mm		60mm	70mm	80mm		90mm	100	110	120		125	130mm	140mm		150mm
允许偏差 Tolerance		＋1/-0.5 mm		＋2/-2 mm					＋3/-2 mm				＋4/-3 mm					＋5/-4 mm
不圆度 Out of Roundness		≤1%		≤2%					≤3%				≤4%					≤5%
金相组织 Microstructure		M+B+C(M-马氏体; B-贝氏体; C-碳化物) (M- Martensite; B- Bainitic; C- Carbide)

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