Optimization of Tribological Properties of Nonasbestos Brake Pad Material by Using Steel Wool

Table 3

List of various physical, thermal, and mechanical characterization.

S. no.	Properties	Na01	Na02	Na03	Na04	Na05
1	Specific gravity	2.23	2.41	2.61	2.74	2.92
2	Hardness; HRS	70	78	84	91	97
3	Acetone extract (%)	2.18	2.15	2.11	2.08	2.02
4	Heat swell (mm)	0.5	0.7	0.9	0.12	0.15
5	Loss of ignition at 800°C (%)	24.54	22.33	20.21	18.51	16.47
6	Cold shear; (Kg/cm^2)	48	46	45	42	39
7	Tensile strength (MPa)	37.21	36.21	33.41	32.45	30.416
8	Compressive strength (MPa)	119.67	125.56	133.42	145.50	174.80