Stud bolts ASTM A193 Gr B7 / Heavy Hex Nut ASTM A194 Gr 2H , Corroshield® PTFE Blue

 Stud bolts ASTM A193 Gr B7 / Heavy Hex Nut ASTM A194 Gr 2H , Corroshield® PTFE Blue

  APPLICATION:

For Pressure vessels, valves, flanges and fittings for high temperature service .

Diameter : 1/2" to 2"

Origin : Korea, Singapore, Vietnam

Thread Standards : ANSI/ASME B1.1

Dimensional Standards : ANSI/ASME B18.2.1

Chemical composition

Physical Element	ASTM A193 grade B7 (AISI 4140)	ASTM A193 grade B8 (AISI 304)	ASTM A193 grade B8M (AISI 316)
Carbon	0.38 – 0.48%	0.08% max	0.08% max
Manganese	0.75 – 1.00%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.030%	0.030%
Silicon	0.15 – 0.35%	1.00% max	1.00% max
Chromium	0.80 – 1.10%	18.0 – 20.0%	16.0 – 18.0%
Nickel	absent	8.0 – 11.0%	10.0 – 14.0%
Molybdenum	0.15 – 0.25%	absent	2.00 – 3.00%

Mechanical properties

ASTM A193	Size	Min Tensile Strength, in ksi	Min Yield Strength, in ksi	Min Elongation, in %	RA % min	Max HBW	Max HRC
ASTM A193 grade B7	Up to 2-1/2	125	105	16	50	321	35
	2-5/8 – 4	115	95	16	50
	4-1/8 – 7	100	75	18	50
ASTM A193 grade B8 Class 1	All	75	30	30	50	223	35
ASTM A193 grade B8M Class 1	All	75	30	30	50	223	96
ASTM A193 grade B8 Class 2	Up to 3/4	125	100	12	35	321	35
	7/8 – 1	115	80	15	35
	1-1/8 – 1-1/4	105	65	20	35
	1-3/8 – 1-1/2	100	50	28	45
ASTM A193 grade B8M Class 2	Up to 3/4	110	95	15	45	321	35
	7/8 – 1	100	80	20	45
	1-1/8 – 1-1/4	95	65	25	45
	1-3/8 – 1-1/2	90	50	30	45

The most common grades of ASTM A194 heavy duty hexagon steel nuts are:

ASTM A194 2H: quenched and tempered carbon steel heavy nut

ASTM A194 2HM: Heavy-duty nut in hardened and tempered carbon steel

ASTM A194 7: Heavy-duty nut of hardened and tempered alloy steel

ASTM A194 7M: Tempered and tempered alloy steel heavy nut

ASTM A194 8: Heavy nut AISI 304 stainless

ASTM A194 8M: Stainless steel AISI 316 heavy nut

ASTM A194 NUTS	Carbon	Manganese	Phosphorous, max	Sulfur, max	Silicon	Chromium	Nickel	Molybdenum	Other Elements
ASTM A194 grade 2, 2H and 2 HM	0.40% min.	1.00% max.	0.04%	0.05%	0.40% max
ASTM A194 grade 7 and 7M (AISI 4140)	0.37-0.49%	0.65-1.10%	0.04%	0.04%	0.15-0.035%	0.75-1.20%		0.15-0.25%
ASTM A194 grade 8 (AISI 304)	0.08%	2.00% max	0.05%	0.03%	1.00% max	18.0-20.0%	8.0-11.0%
ASTM A194 grade 8M (AISI 316)	0.08%	2.00% max	0.05%	0.30%	1.00% max	16.0-18.0%	10.0-14.0%	2.00-3.00%

DESIGN TEMP.	FLANGES	GRADE THREAD RODS	GRADE NUTS
-195° to 102°C	ASTM A182 Gr. F304, F304L, F316, F316L, F321, F347	A320 Gr.B8 Class2	A194 Gr.8A
-101° to -47°C	ASTM A350 Gr.LF3	A320 Gr.L7	A194 Gr.7
-46° to -30°C	ASTM A350 Gr.LF2	A320 Gr.L7	A194 Gr.7
-29° to 427°C	ASTM A105	A193 Gr.B7	A194 Gr.2H
428° to 537°C	ASTM A182 Gr.F11, F22	A193 Gr.B16	A194 Gr.2H
538° to 648°C	ASTM A182 Gr.F11, F22	A193 Gr.B8 Class1	A194 Gr.8A
649° to 815°C	ASTM A182 Gr. F304H, F316H	A193 Gr.B8 Class1	A194 Gr.8A
DESIGN TEMP.	FLG'S	GRADE THREAD RODS	GRADE NUTS