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Introduction
ASTM A322 covers hot-rolled and cold-finished alloy
steel bars intended for general engineering and industrial applications. These bars
are produced in various alloy compositions to provide enhanced strength,
toughness, wear resistance, and fatigue performance.
ASTM A322 alloy steel bars are widely used in
automotive, machinery, and structural applications where high mechanical performance
and reliability are essential.
Ladhani Metal Corporation is a manufacturer, supplier,
and exporter of ASTM A322 alloy steel bars, supplying high-quality bars for
critical engineering and industrial applications.
Applicable
Standard
Standard Specification: ASTM A322
Organization: ASTM International
Title: Standard Specification for Steel Bars, Alloy, Standard Grades
This specification covers hot-wrought alloy steel bars
for general engineering purposes.
Forms of Supply
ASTM A322 alloy steel bars are supplied in the
following forms:
Round bars
Square bars
Hex bars
Flat bars
Cut-to-length bars
Supply Condition
Hot rolled
Cold drawn
Annealed condition
Normalized condition
Surface Finish
Black finish
Bright finish
Peeled
Ground and polished
Standard Sizes
Diameter: 10 mm to 500 mm
Length: Up to 6 meters or as required
Shapes: Round, square, hex, flat
Grades Covered Under
ASTM A322
4140
4130
4340
8620
8630
8640
These grades are alloy steels containing elements such
as chromium, molybdenum, and nickel, providing improved strength and
hardenability.
Chemical Composition of Hot-Wrought Alloy Steel
Bars
|
Grade |
Carbon (%) |
Manganese (%) |
Phosphorus (max
%) |
Sulfur (max %) |
Silicon (%) |
Nickel (%) |
Chromium (%) |
Molybdenum (%) |
|
1330 |
0.28–0.33 |
1.60–1.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
— |
|
1335 |
0.33–0.38 |
1.60–1.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
— |
|
1340 |
0.38–0.43 |
1.60–1.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
— |
|
1345 |
0.43–0.48 |
1.60–1.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
— |
|
4023 |
0.20–0.25 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4024 |
0.20–0.25 |
0.70–0.90 |
0.035 |
0.050 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4027 |
0.25–0.30 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4028 |
0.25–0.30 |
0.70–0.90 |
0.035 |
0.050 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4037 |
0.35–0.40 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4047 |
0.45–0.50 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
— |
0.20–0.30 |
|
4118 |
0.18–0.23 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.40–0.60 |
0.08–0.15 |
|
4120 |
0.18–0.23 |
0.90–1.20 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.40–0.60 |
0.13–0.20 |
|
4121 |
0.18–0.23 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.45–0.65 |
0.20–0.30 |
|
4130 |
0.28–0.33 |
0.40–0.60 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4137 |
0.35–0.40 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4140 |
0.38–0.43 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4142 |
0.40–0.45 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4145 |
0.43–0.48 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4147 |
0.45–0.50 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4150 |
0.48–0.53 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
0.15–0.25 |
|
4161 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
0.25–0.35 |
|
4320 |
0.17–0.22 |
0.45–0.65 |
0.035 |
0.040 |
0.15–0.35 |
1.65–2.00 |
0.40–0.60 |
0.20–0.30 |
|
4340 |
0.38–0.43 |
0.60–0.80 |
0.035 |
0.040 |
0.15–0.35 |
1.65–2.00 |
0.70–0.90 |
0.20–0.30 |
|
E4340 |
0.38–0.43 |
0.65–0.85 |
0.025 |
0.025 |
0.15–0.35 |
1.65–2.00 |
0.70–0.90 |
0.20–0.30 |
|
4615 |
0.13–0.18 |
0.45–0.65 |
0.035 |
0.040 |
0.15–0.35 |
1.65–2.00 |
— |
0.20–0.30 |
|
4620 |
0.17–0.22 |
0.45–0.65 |
0.035 |
0.040 |
0.15–0.35 |
1.65–2.00 |
— |
0.20–0.30 |
|
4621 |
0.18–0.23 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
1.65–2.00 |
— |
0.20–0.30 |
|
4626 |
0.24–0.29 |
0.45–0.65 |
0.035 |
0.040 |
0.15–0.35 |
0.70–1.00 |
— |
0.15–0.25 |
|
4720 |
0.17–0.22 |
0.50–0.70 |
0.035 |
0.040 |
0.15–0.35 |
0.90–1.20 |
0.35–0.55 |
0.15–0.25 |
|
4815 |
0.13–0.18 |
0.40–0.60 |
0.035 |
0.040 |
0.15–0.35 |
3.25–3.75 |
— |
0.20–0.30 |
|
4817 |
0.13–0.20 |
0.40–0.60 |
0.035 |
0.040 |
0.15–0.35 |
3.25–3.75 |
— |
0.20–0.30 |
|
4820 |
0.18–0.23 |
0.50–0.70 |
0.035 |
0.040 |
0.15–0.35 |
3.25–3.75 |
— |
0.20–0.30 |
|
5117 |
0.15–0.20 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
5120 |
0.17–0.22 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
5130 |
0.28–0.33 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
— |
|
5132 |
0.30–0.35 |
0.60–0.80 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.75–1.00 |
— |
|
5135 |
0.33–0.38 |
0.60–0.80 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.05 |
— |
|
5140 |
0.38–0.43 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
5150 |
0.48–0.53 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
5155 |
0.51–0.59 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
5160 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
E52100 |
0.98–1.10 |
0.25–0.45 |
0.025 |
0.025 |
0.15–0.35 |
— |
1.30–1.60 |
— |
|
6118 |
0.16–0.21 |
0.50–0.70 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.50–0.70 |
0.10–0.15 |
|
6150 |
0.48–0.53 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.80–1.10 |
≥0.15 |
|
8615 |
0.13–0.18 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8617 |
0.15–0.20 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8620 |
0.18–0.23 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8622 |
0.20–0.25 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8625 |
0.23–0.28 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8627 |
0.25–0.30 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8630 |
0.28–0.33 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8637 |
0.35–0.40 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8640 |
0.38–0.43 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8642 |
0.40–0.45 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8645 |
0.43–0.48 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8655 |
0.51–0.59 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.15–0.25 |
|
8720 |
0.18–0.23 |
0.70–0.90 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.20–0.30 |
|
8740 |
0.38–0.43 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.20–0.30 |
|
8822 |
0.20–0.25 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.40–0.70 |
0.40–0.60 |
0.30–0.40 |
|
9259 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
0.70–1.10 |
— |
0.45–0.65 |
— |
|
9260 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
1.80–2.20 |
— |
— |
— |
Standard
Boron Steel Grades
|
Grade |
Carbon (%) |
Manganese (%) |
Phosphorus (max
%) |
Sulfur (max %) |
Silicon (%) |
Nickel (%) |
Chromium (%) |
Molybdenum (%) |
|
50B44 |
0.43–0.48 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.20–0.60 |
— |
|
50B46 |
0.44–0.49 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.20–0.35 |
— |
|
50B50 |
0.48–0.53 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.40–0.60 |
— |
|
50B60 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.40–0.60 |
— |
|
51B60 |
0.56–0.64 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
— |
0.70–0.90 |
— |
|
81B45 |
0.43–0.48 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.20–0.40 |
0.35–0.55 |
0.08–0.15 |
|
94B17 |
0.15–0.20 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.30–0.60 |
0.30–0.50 |
0.08–0.15 |
|
94B30 |
0.28–0.33 |
0.75–1.00 |
0.035 |
0.040 |
0.15–0.35 |
0.30–0.60 |
0.30–0.50 |
0.08–0.15 |
Key Features of ASTM
A322 Alloy Steel Bars
High strength and toughness
Excellent fatigue resistance
Good hardenability
Improved wear resistance
Good machinability in annealed condition
Suitable for heat treatment applications
Versatile grades for various engineering needs
Applications of ASTM
A322 Alloy Steel Bars
ASTM A322 bars are widely used in industries requiring
strength, durability, and performance.
Automotive Industry
• Shafts and axles
• Gears and crankshafts
Engineering & Machinery
• Machine components
• Structural parts
Oil & Gas Industry
• Drilling components
• Heavy-duty fittings
Construction Equipment
• Load-bearing components
• Industrial tools
Heat Treatment
Annealing improves machinability
Normalizing refines grain structure
Quenching and tempering enhance strength and hardness
Heat treatment ensures optimal mechanical performance
Conclusion
ASTM A322 alloy steel bars offer a reliable and
high-performance solution for engineering, automotive, and industrial
applications. With a wide range of alloy grades and excellent mechanical
properties, these bars are ideal for components subjected to high stress and
wear.
Ladhani Metal Corporation supplies ASTM A322 alloy
steel bars in various grades and sizes, ensuring high-quality products for
heavy-duty and precision engineering applications.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
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