SD X6NiCrTiMoVB 25-15-2 UNS S66286 - GB /T 3098.24-2020

Performance Level	SD
Other Names
Corresponding Standard	GB /T 3098.24-2020 Mechanical Properties of Fasteners-stainless Steel and Nickel Alloys Bolts, Screws, Studs and Nuts for High Temperature Applications
Classification	Precipitation-Hardening Stainless Steel
Properties	Corrosion Resistance

SD Chemical Element Composition Content (%)

Component	C ^②	Si	Mn	P	S	Cr	Ni	Mo	Ti	V	B	Al	More
Minimum Value	-	-	-	-	-	13.5	24	1	1.9	0.1	0.001	-	Fe:Remainder
Maximum Value	0.08	1	2	0.04	0.03	16	27	1.5	2.35	0.5	0.01	0.35	Fe:Remainder

① SD is the fastener designation, and the material used is ISO material grade, for reference: the composition of alloy 660/UNS S66286 is included.
② For special applications, minimum carbon content can be specified.

SD Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Bolts, screws, studs; all sizes	Solution Heat Treatment (+AT) + Precipitation Hardening (+P)	≥900	≥600	≥0.25d	HRC 22~38
Nuts; all sizes	Solution Heat Treatment (+AT) + Precipitation Hardening (+P)	≥900			22~38

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!