ASTM A320 Bolt

Grade A320 Flange Head Bolt, ASTM A320 B8 Hex Head Bolt, ASME SA320 Grade L7 U Bolt, Grade B8M Allen Bolt, A320 Grade Stud Bolt, ASME SA320 Grade Eye Bolt.

Bolts built to ASTM A320 specifications for stainless and alloy steel are designed for the least-level temperature applications. It includes fasteners that are forged and strain-hardened rolled. The largest manufacturer of ASTM A320 Bolt is fas10. A320’s specification includes class 2, followed by class 1, as well as the L43, L7, B8, and B8M. These are additionally quenched, tempered, treated with a carbide solution, and strain-hardened.  ¾ – 2 ½ inches is the size range.

Different yield tensile strengths are included in the ASTM A320 L7 Stud Bolts. Depending on the various grades within the A320 specification, the required tensile strength ranges from 75 ksi to 125 ksi. The necessary yield strengths for the a320 bolts range from 30 ksi to 105 ksi, and their elongation ratios/rates range from 12% to 30%. The grades’ material compositions differ in terms of sulfur, chromium, silicon, manganese, nickel, molybdenum, phosphorus, and carbon. The nickel content of 14%,  Chromium content of 18%, and molybdenum content of 3% are all present in the ASTM A320 l7M Nuts. The A320 fasteners are robust, malleable, and corrosion-resistant, all because of these material compositions.

ss 317 bolt

About ASTM A320 Bolt

ASTM A320 L7M Hex Bolt, SA320 Grade B8 Allen Bolt, Grade A320 Hex Head Bolt, ASME SA320 Grade L7M Anchor Bolt, Grade B8M U Bolt, ASTM A320 Flange Head Bolt.

Various applications call for the use of ASTM A320 stainless steel bolts. Uses for heat exchangers, boilers, and condensers include power generation facilities, food processing facilities, oil and gas heavy industries, and petroleum, maritime, chemicals, and pharmaceuticals. As a top manufacturer of Grade B8M Allen Bolt, we provide other bolts in various dimensions. For further information and a quote on fasteners that meet the requirements of the A320, don’t hesitate to contact us.

ASTM A320 Bolt Specification

DimensionsASME B18.2.1, B18.3
Melt OriginKorea, South America, Japan, East Europe,
Mandatory RequirementsFree from Mercury & Radioactive Contamination
Additional CertificationsPED 97/ 23/ EC Certified, Merkblatt AD 2000 W2 Certified
CertificationDual Certified As per ASTM & ASME Codes
Additional RequirementsNACE MR0103 / MR0175 / ISO 15156 Compliance
Threads ConfigurationASME B1.1 2A/3A Inch Unified Threads and B1.13M 6h Metric Coarse Threads

Chemical Composition ASTM A320 Bolt

ElementL7 (AISI 4140)L43 (AISI 4340)B8 (AISI 304)B8M (AISI 316)
Carbon0.37 – 0.49%0.38 – 0.43%0.08% max0.08% max
Manganese0.65 – 1.10%0.75 – 1.00%2.00% max2.00% max
Phosphorus (max)0.04%0.04%0.05%0.05%
Sulfur (max)0.04%0.04%0.03%0.03%
Silicon0.15 – 0.35%0.15 – 0.35%1.00% max1.00% max
Chromium0.75 – 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%
Molybdenum0.15 – 0.25%0.20 – 0.30% 2.00 – 3.00%

Mechanical Properties ASTM A320 Bolt

GradeSizeTensile, ksi minYield, ksi minCharpy Impact Elong, % minRA, %, min
L7up to 21/2125105-150° F1650
L43sup a 4125105-150° F1650
B8 Class 1all7530N/A3050
B8M Class 1all7530N/A3050
B8 Class 2Up to 3/4125100N/A1235
 7/8 – 111580N/A1535
 11/8 – 11/410565N/A2035
 13/8 – 11/210050N/A2845
B8M Class 2Up to 3/411095N/A1545
 7/8 – 110080N/A2045
 11/8 – 11/49565N/A2545
 13/8 – 11/29050N/A  

Dimensions Of ASTM A320 Bolt

ASTM A320 Bolts Dimensions Chart :

Hex Bolts Dimensions
All dimensions are in mm unless mentioned otherwise
Nominal Size
or Basic

Full-Size Body
Width Across Flats,
Width Across
Corners, G
Head Height, H BasicRadius of
Fillet, R
Nominal Thread
Length for Bolt
MaxMinMaxMin6 in. and
6 in.
7⁄80.8750.8950.8521 5⁄161.3121.2691.5161.44737⁄640.6040.5310.060.0222.25
111.0220.9761 1⁄21.51.451.7321.65343⁄640.70.5910.
1 1⁄81.1251.1491.0981 11⁄161.6881.6311.9491.8593⁄40.780.6580.
1 1⁄41.251.2771.2231 7⁄81.8751.8122.1652.06627⁄320.8760.7490.090.032.753
1 3⁄81.3751.4041.3452 1⁄162.0621.9942.3822.27329⁄320.940.810.090.0333.25
1 1⁄21.51.5311.472 1⁄42.252.1752.5982.4811.0360.9020.
1 5⁄81.6251.6581.5912 7⁄162.4382.3562.8152.6161 3⁄321.1160.9780.
1 3⁄41.751.7851.7162 5⁄82.6252.5383.0312.8931 5⁄321.1961.0540.120.043.754
1 7⁄81.8751.9121.8392 13⁄162.8122.7193.2483.0991 1⁄41.2761.130.120.0444.25
222.0391.964332.93.4643.3061 11⁄321.3881.1750.
2 1⁄42.252.3052.2143 3⁄83.3753.2623.8973.7191 1⁄21.5481.3270.190.064.755
2 1⁄22.52.5592.4613 3⁄43.753.6254.334.1331 21⁄321.7081.4790.
2 3⁄42.752.8272.7114 1⁄84.1253.9884.7634.5461 13⁄161.8691.6320.190.065.756
333.0812.9614 1⁄24.54.355.1964.95922.061.8150.
3 1⁄43.253.3353.214 7⁄84.8754.7125.6295.3722 3⁄162.2511.9360.190.066.757
3 1⁄23.53.5893.4615 1⁄45.255.0756.0625.7862 5⁄162.382.0570.
3 3⁄43.753.8583.7265 5⁄85.6255.4376.4956.1982 1⁄22.5722.2410.190.067.758
444.1113.975665.86.9286.6122 11⁄162.7642.4240.

Different Types Of ASTM A320 Bolt

Different Types Of Bolts:

Hex Bolt
ASTM A320 Hex Bolts
Carriage bolt
ASTM A320 Carriage Bolts
Stud Bolt
ASTM A320 Stud Bolts
Hex Head bolt
ASTM A320 Hex Head Bolts
Forged Hook bolt
ASTM A320 Forged Hook Bolts
Torx Bolts
ASTM A320 Torx Bolts
countersunk bolt
ASTM A320 Countersunk Bolts
Flange Head Bolts
ASTM A320 Flange Head Bolts
Allen Bolts
ASTM A320 Allen Bolts
12 point flange bolt
ASTM A320 12-Point Flange Bolts
eye bolt
ASTM A320 Eye Bolts
a2 70 stainless steel Bolts
ASTM A320 Bolts
u bolt
ASTM A320 U Bolts
J bolt
ASTM A320 J Bolts
Elevator Bolt
ASTM A320 Elevator Bolt
Threaded expansion anchor bolt
ASTM A320 Threaded Expansion Anchor Bolt
High Performance anchor Bolts
ASME SA320 High Performance Anchor Bolts
lag bolt
ASTM A320 Lag Bolts

Application of ASTM A320 Bolt

Testing of ASTM A320 Bolt

Packing Of ASTM A320 Bolt

Destination Of ASTM A320 Bolt

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Grade B8 Allen Bolt Manufacturer in Singapore, ASME SA320 Grade B8 Allen Bolt Stockist in Dubai, ASME SA320 Grade B8 U Bolt Stockist in Indonesia, ASTM A320 B8 Anchor Bolt Manufacturer in UAE, Grade A320 Eye Bolt Supplier in Malaysia, B8 Grade Allen Bolt Exporter in Argentina, B8 Grade Hex Head Bolt Exporter in Tanzania, Grade A320 Stud Bolt Supplier in Brazil, Grade B8 Hex Bolt Manufacturer in Nigeria, Grade A320 Flange Head Bolt Supplier in Qatar, B8 Grade Stud Bolt Exporter in Saudi Arabia, ASME SA320 Grade B8 U Bolt Stockist in South Africa.
ASME SA320 Grade B8M Hex Head Bolt Catalogue, Grade B8M Allen Bolt Price Per Kg, B8M Grade Hex Bolt Price List in India, ASTM A320 B8M Flange Head Bolt Price List, Grade A320 Eye Bolt Weight Calculator, Grade A320 U Bolt Grade Chart, B8M Grade Anchor Bolt at Factory Price, ASME SA320 Grade B8M Eye Bolt at Factory Price, ASTM A320 B8M Stud Bolt Specification, ASME SA320 Grade B8M Stud Bolt Weight Chart.