STUD BOLT

STUD BOLTadmin2020-01-16T10:41:38+07:00

ASTM

MATERIALS-STUDBOLTS
High temperature service	ASTM A193	ASTM A193 / A193M Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High Temperature or High Pressure Service and Other Special Purpose Applications
Low temperature service	ASTM A320	ASTM A320 / A320M Standard Specification for Alloy-Steel and Stainless Steel Bolting Material for Low-Temperature Service or Both

MATERIALS-HEX NUTS
High / Low temperature service	ASTM A194	ASTM A194 / A194M - 09 Standard Specification for Carbon and Alloy-Steel Nuts for Bolts for High-Pressure or High-Temperature Service or Both.

MATERIALS

Bolt A193	Bolt A320	Nut A194
Alloy Steel : B7, B7M, B16	Alloy Steel : L7, L7M	Alloy Steel : 2H, 2HM, GR.4, GR.7, GR.7M
Stainless Steel : B8, B8M		Stainless Steel : GR.8, GR.8M
High Temperature	Low Temperature	High Pressure and High Temperature

Coating

4-02

Mechanical Properties

ASTM A193(Bolts)

Grade	Size	Tensile (Min) Mpa	Tensile (Min) ksi	Yield (Max) Mpa	Yield (Max) ksi	Elongation (Min) %	Hardness Brinell HB	Hardness Rockwell HR
B5	All Size	690	100	550	80	16	-	-
B6	All Size	760	110	585	85	15	-	-
B7	<=2 1/2″	860	125	725	105	16	321 max	35 C max
	2 3/4″ to 4″	790	115	655	95	16	302 max	33 C max
	>4″	690	100	515	75	18	277 max	29 C max
B8 Cl.1	All Size	515	75	205	30	30	223 max	96 C max
B16	<=2 1/2″	860	125	725	105	18	321 max	35 C max
	2 3/4″ to 4″	760	110	655	95	17	302 max	33 C max
	>4″	690	100	585	85	16	277 max	29 C max

ASTM A194(Nuts)

Grade	Size	Hardness Brinell HB	Hardness Rockwell HR
2H	<= 1 1/2"	248-352	24-38 C
	>= 1 1/2"	212-352	38 C max
3	All Size	248-352	24-38 C
4	All Size	248-352	24-38 C
6	All Size	228-271	20-28 C
7	All Size	248-352	24-38 C
8	All Size	126-300	60-105 B

ASTM A320(Bolts&Nuts)

Grade	Size	Tensile (Min) Mpa	Tensile (Min) ksi	Yield (Max) Mpa	Yield (Max) ksi	Elongation (Min) %	Hardness Brinell HB	Hardness Rockwell HR
L7	All Size	860	125	725	105	16	-	-
B8 Cl.1	All Size	515	75	205	30	30	223 max	96 B max

Chemical Properties

ASTM A193(Bolts)

Chemical Composition, %
Grade	C	Mn	P max.	S max.	Si	Cr	Mo	Other
B5	0.10 min	1.0 max	0.04	0.03	1.0 max	4.0-6.0	0.40-0.65	-
B6	0.15 max	1.0 max	0.04	0.03	1.0 max	11.5-11.3	-	-
B7	0.37-0.49	0.65-1.10	0.035	0.04	0.15-0.35	0.75-1.20	0.15-0.25	-
B8 Cl.1	0.08 max	2.0 max	0.045	0.03	1.0 max	18.0-20.0	-	Ni : 8-10.5
B16	0.36-0.47	0.45-0.70	0.035	0.04	0.15-0.35	0.80-1.15	0.50-0.65	V & Al*

A193 Grade B16 have Vanadiam = 0.25-0.35 and Aluminuim = 0.015 max

ASTM A194(Nuts)

Chemical Composition, %
Grade	C	Mn	P max.	S max.	Si	Cr	Mo	Other
2H	0.04 min	1.0 max	0.04	0.05	0.04 max	-	-	-
3	0.10 min	1.0 max	0.04	0.03	1.0 max	4.0-6.0	0.40-0.65	-
4	0.4-0.5	0.7-0.9	0.035	0.04	0.15-0.35	-	0.20-0.30	-
6	0.15 max	1.0 max	0.04	0.03	1.0 max	11.5-13.5	-
7	0.37-0.49	0.65-1.10	0.04	0.04	0.15-0.35	0.75-1.20	0.15-0.25
8	0.08 max	2.0 max	0.045	0.03	1.0 max	18.0-20.0	-	Ni : 8-10.5

ASTM A320(Bolts&Nuts)

Chemical Composition, %
Grade	C	Mn	P max.	S max.	Si	Cr	Mo	Other
L7	0.38-0.48	0.75-1.0	0.035	0.04	0.15-0.35	0.15-0.25	-	-
B8 Cl.1	0.08 max	2.0 max	0.045	0.03	1.0 max	18.0-20.0	-	Ni : 8-10.5