FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
www.ladhanimetal.com
www.ladhanimetal.in
ladhanimetal@gmail.com
info@ladhanimetals.com
Introduction
SAE J404
steel bars are alloy steel bars specified by the Society of Automotive
Engineers (SAE) for use in demanding mechanical and structural applications.
The SAE J404 standard establishes the chemical composition limits for a wide
range of alloy steels commonly used in bars, forgings, and mechanical
components requiring enhanced strength, toughness, wear resistance, and
hardenability.
Ladhani
Metal Corporation is a manufacturer, supplier, and stockist of SAE J404 steel
bars, offering a wide selection of alloy steel grades suitable for automotive,
heavy engineering, oil & gas, power generation, and industrial
manufacturing sectors.
SAE J404
alloy steels contain alloying elements such as chromium, nickel, molybdenum,
silicon, and manganese. These elements significantly improve mechanical
performance compared to plain carbon steels by enhancing hardenability, fatigue
strength, corrosion resistance, and heat resistance.
The SAE J404
specification primarily focuses on defining the chemical composition of alloy
steels that are widely used for mechanical parts subjected to heavy loads, high
stress, and cyclic fatigue.
Applicable Standard
Standard
Specification: SAE J404
Issuing Organization: SAE International
Title: Chemical Compositions of SAE Alloy Steels
SAE J404
defines the chemical composition requirements for alloy steels commonly used in
bars, forgings, and other mechanical product forms. These steels are widely
used in automotive engineering and industrial machinery manufacturing.
The
specification establishes chemical composition limits, while mechanical
properties depend on the heat treatment condition and product dimensions.
Forms of Supply
SAE J404
alloy steel bars are supplied in a wide range of product forms to suit
industrial and engineering applications.
Round Bars
Square Bars
Flat Bars
Hexagonal Bars
Bright Bars
Cold Drawn Bars
Forged Bars
Typical supply conditions include:
Hot rolled
bars
Annealed bars
Normalized bars
Quenched and tempered bars
Cold finished bars
Standard supply lengths:
3 meters to
6 meters random length
Fixed lengths or cut-to-size bars as per customer specifications
Surface finishes available:
Black (mill
finish)
Peeled surface
Turned bars
Centerless ground bars
Polished or bright bars
Common Grades Covered Under SAE J404
SAE J404
includes numerous alloy steel grades widely used in industrial manufacturing.
Commonly used grades include:
4023, 4024,
4027, 4028
4037, 4047
4118, 4120, 4121
4130, 4135, 4137
4140, 4142, 4145, 4147
4150, 4161
4320
4340
These steels
are classified based on alloying elements such as chromium, molybdenum, nickel,
and manganese, which provide improved hardenability and mechanical strength.
Chemical
Composition of SAE J404 Alloy Steel Grades (%)
TABLE 1 – Alloy Steel
Compositions (Cast or Heat Chemical Ranges)
|
SAE No.
|
C (%)
|
Mn (%)
|
P (%)
|
S (%)
|
Si (%)
|
Ni (%)
|
Cr (%)
|
Mo (%)
|
V (%)
|
|
1330
|
0.28–0.33
|
1.60–1.80
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
–
|
–
|
|
1335
|
0.33–0.38
|
1.60–1.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
–
|
–
|
|
1340
|
0.38–0.43
|
1.60–1.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
–
|
–
|
|
1345
|
0.43–0.48
|
1.60–1.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
–
|
–
|
|
4023
|
0.20–0.25
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
0.20–0.30
|
–
|
|
4027
|
0.25–0.30
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
0.20–0.30
|
–
|
|
4037
|
0.35–0.40
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
0.20–0.30
|
–
|
|
4047
|
0.45–0.50
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
–
|
0.20–0.30
|
–
|
|
4118
|
0.18–0.23
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.40–0.60
|
0.08–0.15
|
–
|
|
4120
|
0.18–0.23
|
0.90–1.20
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.40–0.60
|
0.13–0.20
|
–
|
|
4130
|
0.28–0.33
|
0.40–0.60
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4135
|
0.33–0.38
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4137
|
0.35–0.40
|
0.70–0.90
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4140
|
0.38–0.43
|
0.75–1.00
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4142
|
0.40–0.45
|
0.75–1.00
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4145
|
0.43–0.48
|
0.75–1.00
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4150
|
0.48–0.53
|
0.75–1.00
|
0.030
|
0.040
|
0.15–0.35
|
–
|
0.80–1.10
|
0.15–0.25
|
–
|
|
4320
|
0.17–0.22
|
0.45–0.65
|
0.030
|
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
|
0.030
|
0.040
|
0.15–0.25
|
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
|
0.030
|
0.040
|
0.15–0.35
|
1.65–2.00
|
–
|
0.20–0.30
|
–
|
|
4617
|
0.16–0.21
|
0.40–0.65
|
0.030
|
0.040
|
0.15–0.35
|
1.65–2.00
|
–
|
0.20–0.30
|
–
|
|
SAE No.
|
C (%)
|
Mn (%)
|
P (%)
|
S (%)
|
Si (%)
|
Ni (%)
|
Cr (%)
|
Mo (%)
|
V (%)
|
|
8615
|
0.13–0.18
|
0.70–0.90
|
0.030
|
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
|
0.030
|
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
|
0.030
|
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
|
0.030
|
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
|
0.030
|
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
|
0.030
|
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
|
0.030
|
0.040
|
0.15–0.35
|
0.40–0.70
|
0.40–0.60
|
0.15–0.25
|
–
|
|
8637
|
0.33–0.43
|
0.75–1.00
|
0.030
|
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
|
0.030
|
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
|
0.030
|
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
|
0.030
|
0.040
|
0.15–0.35
|
0.40–0.70
|
0.40–0.60
|
0.15–0.25
|
–
|
|
8720
|
0.18–0.23
|
0.75–1.00
|
0.030
|
0.040
|
0.15–0.35
|
0.40–0.70
|
0.40–0.60
|
0.20–0.30
|
–
|
|
8740
|
0.40–0.45
|
0.75–1.00
|
0.030
|
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
|
0.030
|
0.040
|
0.15–0.35
|
0.40–0.70
|
0.70–0.90
|
0.30–0.40
|
–
|
|
9254
|
0.51–0.59
|
0.60–0.80
|
0.030
|
0.040
|
1.20–1.60
|
–
|
0.60–0.80
|
–
|
–
|
|
9259
|
0.56–0.64
|
0.75–1.00
|
0.030
|
0.040
|
0.70–1.10
|
–
|
0.45–0.65
|
–
|
–
|
|
9260
|
0.56–0.64
|
0.75–1.00
|
0.030
|
0.040
|
1.80–2.20
|
–
|
–
|
–
|
–
|
Mechanical Properties of SAE J404 Alloy Steel Bars
Mechanical
properties vary depending on grade and heat treatment condition. Typical values
for commonly used grades such as 4140 in quenched and tempered condition are
shown below.
|
Property
|
Typical Value
|
|
Tensile
Strength
|
850 – 1000
MPa
|
|
Yield
Strength
|
650 – 850
MPa
|
|
Elongation
|
14 – 20 %
|
|
Hardness
|
28 – 32
HRC
|
Nickel-containing
grades such as 4340 offer superior toughness and fatigue resistance, making
them suitable for highly stressed components.
Heat Treatment
SAE J404
alloy steels respond well to conventional heat treatment processes.
Common heat
treatment processes include:
Annealing
Normalizing
Quenching and tempering
Carburizing (for low carbon alloy steels)
Heat
treatment significantly enhances mechanical properties such as hardness,
strength, and wear resistance.
Key Features of SAE J404 Alloy Steel Bars
High tensile
and yield strength
Excellent hardenability
Superior fatigue resistance
Good toughness under heavy loads
Improved wear resistance
Good response to heat treatment
Wide range of alloy grades available
These
characteristics make SAE J404 alloy steels suitable for critical mechanical
applications.
Machinability
Machinability
of SAE J404 steels depends on alloy composition and heat treatment condition.
In annealed condition, these steels exhibit good machinability. Free-machining
variants may contain higher sulfur content to improve cutting performance.
Proper
tooling and coolant usage are recommended to ensure efficient machining
operations.
Industrial Applications of SAE J404 Steel Bars
SAE J404
alloy steel bars are widely used in many industries requiring high-strength and
durable mechanical components.
Automotive Industry
Crankshafts
Axles
Gears
Connecting rods
Transmission shafts
Heavy Engineering
Industrial
shafts
Machine tool components
Couplings and gears
Forged mechanical parts
Oil and Gas Industry
Drilling
equipment
Tool joints
High-strength fasteners
Power Generation
Turbine
shafts
Generator components
Heavy-duty mechanical parts
Aerospace and Defense
High-strength
structural components
Aircraft landing gear components (selected grades)
These steels
are commonly selected for components that must withstand heavy loads, shock,
and fatigue stresses.
Conclusion
SAE J404
alloy steel bars provide enhanced mechanical performance, durability, and
reliability for demanding engineering applications. With a wide variety of
alloy grades available, these steels offer excellent hardenability, fatigue
resistance, and high strength for critical industrial components.
Ladhani
Metal Corporation supplies SAE J404 alloy steel bars in multiple grades, sizes,
and supply conditions, ensuring consistent quality and compliance with global
industry standards for automotive, heavy engineering, and industrial
manufacturing sectors.
FOR REQUIREMENT OF THIS GRADE OR FOR DETAIL CONTACT US AT :-
www.ladhanimetal.com
www.ladhanimetal.in
ladhanimetal@gmail.com
info@ladhanimetals.com
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