Stud Bolts, Size : M3 - M56, 3/6" To 2", Custom Sizes

Stud Bolt -Grade Identification Markings

Grade	Size	Tensile ksi, min	Yield, ksi, min	Elong, %, min	RA % min
B7	Up to 2-1/2	125	105	16	50
	2-5/8 – 4	115	95	16	50
	4-1/8 – 7	100	75	18	50
B8 Class 1	All	75	30	30	50
B8M Class 1	All	75	30	30	50
B8 Class 2	Up to 3/4	125	100	12	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
B8M Class 2	Up to 3/4	110	95	15	45
	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

ASTM A193 Grade B7 Stud Bolts Chemical Composition

Element	B7 (AISI 4140)	B8 (AISI 304)	B8M (AISI 316)
Carbon	0.37 – 0.49%	0.08% max	0.08% max
Manganese	0.65 – 1.10%	2.00% max	2.00% max
Phosphorus, max	0.04%	0.05%	0.05%
Sulfur, max	0.04%	0.03%	0.03%
Silicon	0.15 – 0.35%	1.00% max	1.00% max
Chromium	0.75 – 1.20%	18.0 – 20.0%	16.0 – 18.0%
Nickel		8.0 – 11.0%	10.0 – 14.0%
Molybdenum	0.15 – 0.25%		2.00 – 3.00%

Standard / Material grade	C	Mn	P	S	Si	Cr	Mo	Al	V
ASTM A193 B7 (Cr- Mo AISI 4140, 4142, 4145 )	0.37-0.49	0.65-1.10	0.035 Max	0.04 Max	0.15-0.35	0.75-1.20	0.15-0.25	–	–
ASTM A1193 B7M (Cr- Mo AISI 4140, 4142, 4145 )	0.37-0.49	0.65-1.10	0.035 Max	0.04 Max	0.15-0.35	0.75-1.20	0.15-0.25	–	–
ASTM A193 B16 (Cr- Mo -V )	0.36-0.47	0.45-0.70	0.035 Max	0.04 Max	0.15-0.35	0.80-1.15	0.50-0.65	0.015Max	0.25-0.35
ASTM A193 B5 (5% Cr AISI 501)	0.10 max	1.00 max	0.040 max	0.030 Max	1.00 Max	0.40 -6.00	0.40 -0.65	–	–
ASTM A320-L7 (Cr- Mo AISI 4140, 4142, 4145 )	0.38-0.48	0.75-1.00	0.035 Max	0.04 Max	0.15-0.35	0.80-1.10	0.15-0.25	–	–
ASTM A 320 L7M	0.38-0.48	0.75-1.00	0.035 Max	0.04 Max	0.15-0.35	0.80-1.10	0.15-0.25	–	–
ASTM A194 Gr.2H	0.40 Min	1.00 Max	0.040 Max	0.050 Max	0.40 Max	–	–	–	–
ASTM A194 Gr.2HM	0.40 Min	1.00 Max	0.040 Max	0.050 Max	0.40 Max	–	–	–	–
ASTM A194 Gr.4	0.40-0.50	0.70-0.90	0.035 Max	0.04 Max	0.15 – 0.35	0.20 – 0.30	–	–	–

Recommended Nuts, Bolts & Washer

Bolt Grade	Nuts	Washers
B7	A194 Grade 2H	F436
B8 Class 1	A194 Grade 8	SS304
B8M Class 1	A194 Grade 8M	SS316
B8 Class 2	A194 Grade 8	SS304
B8M Class 2	A194 Grade 8M	SS316

STUD BOLTS SPECIFICATION

Material	Standards	Grades
Nickel Alloy stud bolts	ASTM / ASME SB 160 / 164 / 425 / 166 / 446 / 574 / 472	UNS 2200 (NICKEL 200) / UNS 2201 (NICKEL 201), UNS 4400 (MONEL 400), UNS 8825 (INCONEL 825), UNS 6600 (INCONEL 600) / UNS 6601 (INCONEL 601), UNS 6625 (INCONEL 625), UNS 10276 (HASTELLOY C 276), UNS 8020 (ALLOY 20 / 20 CB 3)
Stainless Steel stud bolts	ASTM / ASME A/SA 193 / 194	B 8 (304), B 8C (SS 347), B 8M (SS 316), B 8 T (SS 321), A 2, A 4
Alloy Steel stud bolts	ASTM / ASME A/SA 193 / 194 GR	B 6, B 7/ B 7M, B 16, 2, 2HM, 2H, GR 6, B 7, B 7M
Duplex Steel stud bolts	UNS NO. S 31803, S 32205	Range: M10 TO M100, LENGTH UPTO 5 METERS
Nonmetallic Materials:	Acrylic, Kel-F, Lexan, Polypropylene, Poly Vinyl Chloride, Teflon, Zytel 31, 101, 105
High-Temp Alloys	Discaloy, 19-9 DL, 16-25-6, A286, Titanium, Nimonic 80, Mulitmet, Haynes 25, Greek Ascalloy, Unitemp 252, Udimet 500, Rene 41, Inco 700, Inco 901, Hastelloy X, 235, Waspaloy, RA 330
Copper Base Alloys	Copper, Brasses: Yellow, Free-cut, Red, Naval, Bronze: Commercial, Phosphor, Silicon A & B, Aluminum, Silicon-Aluminum, Manganese, Ampco Alloys, Munitz Metal, Cupro-Nicles
Aluminum Alloys:	1100, 2011, 2014, 2017, 2024, 3003, 5052, 6053, 6061, 7075
Trademarks:	Carpenter, Armco, INCO, Cabot, DuPont.
Finish:	Black Oxide, Zinc Plating, Hot Dip Galvanized