ASTM A193 Grade B8 Specification

Aanuraj Fasteners Pvt Ltd. Type 304 stainless fasteners offers corrosion resistance. Lesser to type 316 stainless due to the added molybdenum.

Grade B8 Class 1 fasteners require carbide solution treatment,

Class 2 fasteners require an additional strain hardening operation which increases the strength and reduces the susceptibility to galling.

Class 2 fasteners are marked “RAJ B8” with the grade symbol underlined.

ASTM A193 GR.B8 STANDARD PDF DOWNLOAD

Standards	ASTM A 193 Gr.B8
CLASS:	CL.1/CL.2
MOC:	SS 304
Dimensions:	ASME B18.2.1 , ASME B18.3
THREADS INCHES:	ASME B1.1 2A/3A Unified Threads
THREADS METRICS:	B1.13M 6h Coarse Threads
Additional Requirements:	NACE MR0103/MR0175/ ISO 15156 Compliance
Mandatory Requirements:	Free from Mercury & Radioactive Contamination

Chemical elements % @ AISI 304

Chemical Elements	Min.%	Max.%	Product Variation over or Under
Carbon C%		0.08	0.01 over
Manganese Mn		2.00	0.04 over
Phosphorus		0.045	0.010 over
Sulfur		0.030	0.005 over
Silicon		1.00	0.05 over
Nickel	8.0	10.50	0.15
Chromium	18.0	20.00	0.20

Mechanical Properties: Metric Products:

Mechanical Elements		Tensile Strength Min MPA	Yield Strength Min MPA	Elongation Min%	Reduction Min%	Hardness Max
ASTM A193 GRADE B8 CL.1
	75 [515]		30 [205]	30	50	96 HRB
ASTM A193 GRADE B8 CL.2
M20 and under	125 [860]		100[690]	12	35	35 HRC
M20 to M25	115[795]		80[550]	15	30	35 HRC
M25 to M32	105[725]		65[450]	20	35	35 HRC
M32 to M40	100[690]		50[345]	28	45	35 HRC

Annealing Process:


ANNEALING TEMPERATURE	HOURS	QUENCHING MEDIA
	140 TO 150	RUNNING
1050°c	MINUTES	WATER

Stainless steel 304 Gr.B8 Hex Bolts BUY ONLINE.