ASTM A320 Grade B8T Stud Bolts

321S31, BS2337, 1.4541, 321, S32100, X6CRNITI18-10

A320 Grade B8T Stud Bolts are manufactured from 321 Stainless Steel in accordance with ASTM A320 specification. Torqbolt is a prominent A320 Grade B8T Stud Bolt supplier in India.

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ASTM A320 Grade B8T Stud Bolts Properties

ASTM A320 Grade B8T Stud Bolts Chemical Requirements

Austenitic Steels

Grade Symbol	UNS Designation		C, max	Mn, max	P, max	S, max	Si, max	Ni	Cr	Mo	Se	Ti	N	Nb E + Ta
ASTM A320 B8T	S32100(321)	Range,%	0.08	2.00	0.045	0.030, max	1.00	9.0- 12.0	17.0- 19.0	...	...	5 × (C+N) min -0.7 max	010, max	...
ASTM A320 B8T	S32100(321)	Product Variation, % Over or Under	0.01 over	0.04 over	0.010 over	0.005 over	0.05 over	0.15	0.20	...	...	0.05 under	1	...

ASTM A320 Grade B8T Stud Bolts Mechanical Requirements

Austenitic Steels

Grade and Class	Diameter, in. [mm]	Heat Treatment	Minimum Tempering Temperature, °F [°C]	Tensile Strength, min, ksi [MPa]	Yield Strength, min, ksi [MPa] (0.2 % offset)	Elongation in 2 in. or 50 mm, min, %	Reduction of Area, min, %	Hardness, max
ASTM A320 B8T Class 1	All diameters	carbide solution treated	...	75 [515]	30 [205]	30	50	223 HBW^Dor 96 HRB
ASTM A320 B8T Class 2	³/₄ [20] and under	carbide solution treated and strain hardened	...	125 [860]	100 [690]	12	35	321 HBW or 35 HRC
	over ³/₄ to 1 [20 to 25], incl		...	115 [795]	80 [550]	15	30	321 HBW or 35 HRC
	over 1 to 1¹/₄ [25 to 32], incl		...	105 [725]	65 [450]	20	35	321 HBW or 35 HRC
	over 1¹/₄ to 1¹/₂ [32 to 40], incl^A		...	100 [690]	50 [345]	28	45	321 HBW or 35 HRC

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