Esparragos ASTM A320 L7 / L7m Stud Bolt

Product Details
Customization: Available
Material: High Strength Steel
Type: Round Head
Gold Member Since 2020

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Basic Info.

Model NO.
ASTM A320 L7 / L7M
Connection
Common Bolt
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%

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