Esparragos ASTM A320 L7 / L7m Stud Bolt

• Customization: Available
• Material: High Strength Steel
• Type: Round Head
• Model NO.: ASTM A320 L7 / L7M
• Head Style: Round
• Standard: ANSI
• Grade: ASTM A320 L7
• Application: Chemical Industry
• Finish: Hot Galvanizing
• Steel Grade: ASTM A320 L7
• Transport Package: Playwood Box, Wooden Case
• Specification: ESPARRAGOS ASTM A320 L7 / L7M
• Trademark: C&N
• Origin: China
• Production Capacity: 100tons/Month

Product Description

We offer high quality ASTM A320 L7 Bolts from 3/8" to 2" Diameter in multiple lengths and either standard thread length or custom thread length


A320 Grades
 

L7 Alloy steel	AISI 4140/4142 Quenched and tempered
L43 Alloy steel	AISI 4340 Quenched and tempered
B8 Class 1 Stainless steel	AISI 304, carbide solution treated
B8M Class 1 Stainless steel	AISI 316, carbide solution treated
B8 Class 2 Stainless steel	AISI 304, carbide solution treated, strain hardened
B8M Class 2 Stainless steel	AISI 316, carbide solution treated, strain hardened

A320 Mechanical Properties
 

Grade	Diameter	Tensile, ksi, min	Yield, ksi, min	Charpy Impact 20-ft-lbf @ temp	Elong, %, min	RA, %, min
L7	Up to 21?2	125	105	-150° F	16	50
L43	Up to 4	125	105	-150° F	16	50
B8 Class 1	All	75	30	N/A	30	50
B8M Class 1	All	75	30	N/A	30	50
B8 Class 2	Up to 3?4	125	100	N/A	12	35
	7?8 - 1	115	80	N/A	15	35
	11?8 - 11?4	105	65	N/A	20	35
	13?8 - 11?2	100	50	N/A	28	45
B8M Class 2	Up to 3?4	110	95	N/A	15	45
	7?8 - 1	100	80	N/A	20	45
	11?8 - 11?4	95	65	N/A	25	45
	13?8 - 11?2	90	50	N/A	30	45

A320 Chemical Properties
 

Element	L7 (AISI 4140)	L43 (AISI 4340)	B8 (AISI 304)	B8M (AISI 316)
Carbon	0.37 - 0.49%	0.38 - 0.43%	0.08% max	0.08% max
Manganese	0.65 - 1.10%	0.75 - 1.00%	2.00% max	2.00% max
Phosphorus, max	0.035%	0.035%	0.045%	0.045%
Sulfur, max	0.040%	0.040%	0.030%	0.030%
Silicon	0.15 - 0.35%	0.15 - 0.35%	1.00% max	1.00% max
Chromium	0.75 - 1.20%	0.70 - 0.90%	18.0 - 20.0%	16.0 - 18.0%
Nickel		1.65 - 2.00%	8.0 - 11.0%	10.0 - 14.0%
Molybdenum	0.15 - 0.25%	0.20 - 0.30%		2.00 - 3.00%