ANSI A320 L7 Carbon Steel Fully Threaded Studs

Place of Origin CHINA
Brand Name QBH
Certification ISO9001
Model Number 1/4--4inch
Minimum Order Quantity 1000KG
Price 1200USD-3000USD/TON
Packaging Details BULK or according customer requirement
Delivery Time 30days
Payment Terms L/C, T/T,OA
Supply Ability 600TON/MONTH
Product Details
Material Carbon Steel Stainless Steel SIZE 1/4-4INCH
LENGTH ALL KIND OF LENGTH Surface HDG YZP ZP BLACK PTEE DACROMET
Samples Free
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A320 Fully Threaded Studs

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L7 Fully Threaded Studs

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ANSI Carbon Steel Threaded Rod

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Product Description

ANSI A320 L7 Carbon Steel Fully Threaded Studs

 

Originally approved in 1948, the ASTM A320 specification covers alloy steel and stainless steel bolting materials for low temperature service. This standard covers rolled, forged, or strain hardened bars, bolts, screws, studs, and stud bolts used for pressure vessels, valves, flanges, and fittings. Like the ASTM A193 specification, unless otherwise specified, the 8UN thread series is specified on fastener larger than 1” in diameter.

Below is a basic summary of a few of the common grades within the ASTM A320 specification. A number of other less common grades of ASTM A320 exist, but not covered in the description below.

 

 

 

ANSI A320 L7 Carbon Steel Fully Threaded Studs 0

Screw Thread
d
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1-1/8 1-1/4 1-3/8
d
PP UNC
UNF
8UN
u max UNC
UNF
8UN
0.2500 0.3125 0.3750 0.4375 0.5000 0.5625 0.6250 0.7500 0.8750 1.0000 1.1250 1.2500 1.3750
20 18 16 14 13 12 11 10 9 8 7 7 6
28 24 24 20 20 18 18 16 14 12 12 12 12
- - - - - - - - - - 8 8 8
0.100 0.111 0.125 0.143 0.154 0.167 0.182 0.200 0.222 0.250 0.286 0.286 0.333
0.071 0.083 0.083 0.100 0.100 0.111 0.111 0.125 0.143 0.167 0.167 0.167 0.167
- - - - - - - - - - 0.250 0.250 0.250
Screw Thread
d
1-1/2 1-5/8 1-3/4 1-7/8 2 2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4
d
PP UNC
UNF
8UN
u max UNC
UNF
8UN
1.5000 1.6250 1.7500 1.8750 2.0000 2.2500 2.5000 2.7500 3.0000 3.2500 3.5000 3.7500 4.0000
6 - 5 - 4-1/2 4-1/2 4 4 4 4 4 4 4
12 - - - - - - - - - - - -
8 8 8 8 8 8 8 8 8 8 8 8 8
0.333 - 0.400 - 0.444 0.444 0.500 0.500 0.500 0.500 0.500 0.500 0.500
0.167 - - - - - - - - - - - -
0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250 0.250

 

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 212 125 105 -150° F 16 50
L43 Up to 4 125 105 -150° F 16 50
Class 1: BC, B8C, B8M, B8P, B8F, B8T, B8LN, B8MLN All 75 30 N/A 30 50
Class 1A: B8A, B8CA, B8MA, B8PA, B8FA, B8TA, B8LNA, B8MLNA All 75 30 N/A 30 50
Class 2: B8, B8C, B8P, B8F, B8T Up to 34 125 100 N/A 12 35
78 - 1 115 80 N/A 15 35
118 - 114 105 65 N/A 20 35
138 - 112 100 50 N/A 28 45
Class 2: B8M Up to 34 110 95 N/A 15 45
78 - 1 100 80 N/A 20 45
118 - 114 95 65 N/A 25 45
138 - 112 90 50 N/A 30 45

A320 Chemical Properties

Element L7 (AISI 4140) L43 (AISI 4340) B8 (AISI 304) B8M (AISI 316)
Carbon 0.38 - 0.48% 0.38 - 0.43% 0.08% max 0.08% max
Manganese 0.75 - 1.00% 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 0.80 - 1.10% 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%

A320 Recommended Hardware

Grade Nuts Washers
L7 A194 Grade 4 or 7 F436
L43 A194 Grade 4 or 7 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
Strain hardened nuts available as a supplementary requirement

Specification

 

A threaded rod, also known as a stud, is a relatively long rod that is threaded on both ends; the thread may extend along the complete length of the rod. They are designed to be used in tension. Threaded rod in bar stock form is often called all-thread.

 

 

All thread rod, commonly referred to as fully threaded rod, redi-rod, continuously threaded rod, TFL rod, and abbreviated ATR is used for general purpose fastening for anything from an anchor bolt to a through bolt. A variety of grades and materials are available.

 

 

 

 

Materials and Chemical compstition


 

 

42CRMO

CHEMICAL COMPOSI %
C Si Mn P S Cr Ni Cu Mo
0.42 0.27 0.92 0.013 0.004 1.01 0.03 0.04 0.2

 

stainless steel

 

  化学成分CHEMICAL COMPOSI(% )
Type C碳 Si硅 Mn锰 P磷 S硫 Ni镍 Cr铬 Mo钼 Cu铜 Others
 
201Cu 0.08 1.00 7.5-10 0.06 0.03 4.00-6.00 14.0-17.0   2.0-3.0  
201 0.15 1.00 8.50 0.06 0.03 3.50-5.50 16.0-18.0     N≤0.25
130M/202 0.15 1.00 7.5-10 0.06 0.03 4.00-6.00 17.0-19.0     N≤0.25
202 0.15 1.00 7.5-10 0.06 0.03 4.00-6.00 17.0-19.0      
301 0.15 1.00 2.00 0.045 0.03 5.00-8.00 16.0-18.0      
302 0.15 1.00 2.00 0.045 0.03 8.00-10.0 17.0-19.0      
XM7
(302HQ)
0.08 1.00 2.00 0.045 0.03 8.50-10.5 17.0-9.00   3.0-4.0  
303 0.15 1.00 2.00 0.20 ≥0.15 8.00-10.0 17.0-19.0 ≤0.60    
303Cu 0.15 1.00 3.00 0.20 ≥0.15 8.0-10.0 17.0-19.0 ≤0.60 1.5-3.5  
304 0.08 1.00 2.00 0.045 0.03 8.00-10.0 18.0-20.0      
304H 0.08 1.00 2.00 0.045 0.03 8.0-10.0 18.0-20.0      
304HC 0.08 1.00 2.00 0.045 0.03 8.00-10.0 17.0-19.0   2.0-3.0  
304HCM 0.08 1.00 2.00 0.045 0.03 8.0-10.0 17.0-19.0   2.5-4.0  
304L 0.03 1.00 2.00 0.045 0.03 9.0-13.0 18.0-20.0      
304M 0.06 1.00 2.00 0.045 0.03 8.50-10.0 18.0-20.0      
305 0.12 1.00 2.00 0.045 0.03 10.5-13.0 17.0-19.0      
305J1 0.08 1.00 2.00 0.045 0.03 11.0-13.5 16.5-19.0      
309S 0.08 1.00 2.00 0.045 0.03 12.0-15.0 22.0-14.0      
310S 0.08 1.50 2.00 0.045 0.03 19.0-22.0 24.0-26.0      
314 0.25 15.-3.0 2.00 0.040 0.03 19.0--22.0 24.0-26.0      
316 0.08 1.00 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.0-3.0    
316Cu 0.03 1.00 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.0-3.0 2.0-3.0  
316L
(12Ni)
0.03 1.00 2.00 0.045 0.03 12.0-15.0 16.0-18.0 2.0-3.0    
316L
(10Ni)
0.03 1.00 2.00 0.045 0.03 10.0-14.0 16.0-18.0 2.0-3.0    
321 0.08 1.00 2.00 0.045 0.03 9.00-13.0 17.0-19.0     Ti≤5*C%
410 0.15   1.00   0.03   11.5-13.5      
416 0.15   1.25   ≥0.15   12.0-14.0      
420 0.26-0.4   1.00   0.03   12.0-14.0      
410L 0.30 1.00 1.00 0.040 0.03   11.5-13.5      
430 0.12 0.75 1.00 0.040 0.03   16.0-18.0      
430F 0.12 1.00 1.25 0.060 0.15   16.0-18.0      
631(J1) 0.09 1.00 1.00 0.040 0.03 6.50-8.50 16.0-18.0     AL 0.75-1.5
2520 0.08 1.00 2.00 0.035 0.03 19.0-22.0 24.0-26.0      
410 0.015 1.00 1.00 0.04 0.03   11.5-13.5      

 

 

 

 

Finish

 

PLAIN ZP YZP BLACK HDG DACROMET GEOMET CHROME NICKEL AND SO ON

 

 

PACKING

QBH BULK

20-25KG/CTN,36CTNS/PALLET

20-30KG/BAGS,36BAGS/PALLET

ONE TON/BOXES

50KG/ IRON DRUM,12 IRON DRUMS/PALLET

 

QBH SMALL PACKING

Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements

 

QBH PALLET TYPE

SOLID WOOD FUMIGATION PALLET

EURO Pallet

THREE SPLINT PALLET

WOODEN BOX

 

 

The advantages of QBH

  • QBH brand sales to the main quality assurance.
  • Years of export trade management, excellent service, word-of-mouth guarantee.
  • By working with TUV,escort for quality.
  • Customization of non-standard parts can be made according to customer's requirements and drawings.
  • For quality customers,we can provide a certain credit period.