Handbook of Plastics Testing and Failure Analysis. Vishu Shah

according to the classification.

TABLE 1‐1. POM Polyoxymethylene (Acetal) Materials, Detail Requirements, ^hNatural Color Only

Group	Description	Class	Description	Grade	Descriptiona	Flow Rate, ISO 1133b (g/10 min)	Melting Point, ISO 3146/ Method C2c (°C, min)	Density, ISO 1183 (g/cm3)	Tensile Strength, ISO 527d (MPa, min)	Flexural Modulus, ISO 178e (MPa, min)	Izod Impact Resistance, ISO 180/1Af (KJ/m2, min)	Deflection Temperature, ISO 75/Method A,g 1.82 MPa (°C, min)
1	Homopolymer	1	General purpose	1		<8	170	1.39–1.44	65	2400	8.5	100
			and high flow	2		8–16	170	1.39–1.44	65	2700	5.0	100
				3		16–28	170	1.39–1.44	65	2700	4.5	105
				4		28–55	170	1.39–1.44	65	2700	4.0	105
				0	Other
		2	Fast cycle	1		11–18	170	1.39–1.44	65	2400	4.5	100
				2		19–33	170	1.39–1.44	65	2400	4.0	100
				0	Other
		3	UV stabilized	1		<8	170	1.39–1.44	65	2400	8.5	100
				2		8–16	170	1.39–1.44	65	2700	5.0	100
				0	Other
		4	Impact modified	1		<3	170	1.31–1.37	35	1100	70	70
				2		8–15	170	1.36–1.42	45	1900	9.0	80
				0	Other