A4 Washer properties

The ISO 7089, DIN 125, DIN 127, DIN 6916, Dast 021, EN 14399-6 Grade MS, HV 100, HV 200, HV 300 & A4 specification covers Washer ranging from M-12 to M-64 diameter. We use high MS, SS, carbon steel material and high alloy steel raw materials to achieve the required properties in this standard. There are five popular grades are, MS, HV 100, HV 200, HV 300 & A4 which denote material hardness strength and their respective mechanical properties for A4 Washer.

MS		Plain Washer, Chamfer washer, Machined Washer, Spring etc.
HV 100		Plain Washer, Chamfer washer, Machined Washer, Spring etc.
HV 200		Plain Washer, Chamfer washer, Machined Washer, Spring etc.
HV 300		Plain Washer, Chamfer washer, Machined Washer, Spring etc.
A4		Plain Washer, Chamfer washer, Machined Washer, Spring etc.

Steel Group	Steel Grade	Chemical composition
		mass fraction, % (maxima unless stated))
Austenitic		C	Si	Mn	P	S	Cr	Mo	Ni	Cu
	A4	0.08	1	2	0.045	0.03	16 to 18.5	2 to 3	10 to 15	4

Mechanical or physical property	Micro Vickers Harness, HV
	min.	max.
A4	-	200 HV