ASTM F568 Grade 9.8 Threaded Rods, ASTM F568 Grade 9.8 Studs, ASTM F568 Grade 9.8 Bolts, ASTM F568 Grade 9.8 Screws Supplier in Mumbai, India.

ISO 898, often known as Sae Class 9.8, is an international standard that specifies the mechanical and physical qualities of metric fasteners. Other standards, such as Sae J1199 Class 9.8 and ASTM F568 Class 9.8, are known to define parameters for identical metric fasteners and are based on the ISO 898 Class 9.8 standard. The requirements The Fastener Grade 9.8 standard applies to fasteners made of medium carbon steel and measuring between M1.6 and M16 in size. Quenching and tempering are used to treat these Metric Class 9.8 standard fasteners.

Chemical Composition

Strength class	Material and heat treatment	Chemical composition (analysis on the product) %					Minimum hardening temperature °C
		C		P	S	B
		min	max	max	max	max
Grade 9.8	Carbon or alloy steel (B, Mn, Cr), quenched and tempered	0,15	0,40	0,025	0,025	0.003	425
	Quenched and tempered carbon steel	0,25	0,55	0,025	0,025
	Quenched and tempered alloy steel	0,20	0,55	0,025	0,025

Mechanical Properties