Alloy Steel
At Stellanox Steel, we manufacture and supply high-quality Alloy Steel products engineered for demanding structural, mechanical, and high-temperature applications. Known for its enhanced strength, toughness, and resistance to wear and fatigue, Alloy Steel is a preferred material across industries including automotive, oil & gas, aerospace, construction, power generation, and heavy machinery.
Whether for forging, machining, or pressure containment, Stellanox Steel’s alloy steels deliver performance and reliability under extreme operational conditions.
What is Alloy Steel?
To increase its mechanical and physical qualities, alloy steel is made with different amounts of different elements, including silicon, manganese, nickel, molybdenum, chromium, and vanadium.
Alloy steel has superior toughness at both high and low temperatures, as well as better wear resistance, tensile strength, and hardness when compared to carbon steel. By modifying the alloying materials, heat treatments, and forming procedures, it can be customised for certain uses.
| Products |
|---|
|
Stainless Steel |
|
Carbon Steel |
|
Duplex Stainless Steel |
|
Super Duplex Stainless Steel |
|
Alloy Steel |
|
Titanium |
|
Hastelloy |
|
Inconel |
|
Monel |
|
Aluminium |
|
Copper |
|
Pure Nickel |
|
Flanges |
|
Forged Fittings |
|
Valves |
|
Fasteners |
Key Features
- High Hardness and Strength: Even after heat treatment or at high temperatures.
- Excellent Resistance to Wear and Fatigue: Perfect for spinning machinery, shafts, gears, and tools.
- Outstanding Toughness: Functions well under mechanical stress and shock loading.
- Improved Hardenability: The ability to harden deeply when quenching.
- Versatile Composition: Alloying allows for customisation for performance according to a certain application.
- Adequate for Machining, Heat Treatment, and Forging: a common application in heavy-duty industries.
Specifications
| Property | Details |
|---|---|
| Product | Alloy Steel |
| Common Grades | 4140, 4340, 8620, 4130, 42CrMo4, EN24, SCM440, AISI 52100 |
| Manufacturing Standards | ASTM A29, A182, A213, A335, A519, EN 10083, JIS G4053 |
| Product Forms | Sheets, Plates, Bars, Rods, Pipes, Tubes, Forgings, Fittings |
| Surface Finish Options | Black, Bright, Peeled, Turned, Polished, Annealed |
| Heat Treatment | Normalized, Annealed, Quenched and Tempered, Nitrided |
| Size Range | As per product type and grade specifications |
| Testing and Certification | EN 10204 3.1/3.2, UT, MPI, IGC, Mechanical & Chemical Test Reports |
Chemical Compositions
| Element | Symbol | Composition (%) |
|---|---|---|
| Carbon | C | 0.38 – 0.43 |
| Chromium | Cr | 0.80 – 1.10 |
| Manganese | Mn | 0.75 – 1.00 |
| Molybdenum | Mo | 0.15 – 0.25 |
| Silicon | Si | 0.15 – 0.30 |
| Sulfur | S | ≤ 0.035 |
| Phosphorus | P | ≤ 0.035 |
| Iron | Fe | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 655 – 850 |
| Yield Strength (MPa) | 415 – 650 |
| Elongation (%) | 20 – 25 |
| Hardness (HB) | 197 – 235 |
| Impact Toughness (Charpy V-notch) | ≥ 54 J @ -20°C |
Equivalent Grades
| Standard | Equivalent Grades |
|---|---|
| ASTM | 4140, 4130, 4340, 8620 |
| AISI | 4140, 52100, 6150, 9310 |
| EN | 42CrMo4, 34CrNiMo6, 16MnCr5 |
| JIS | SCM440, SNCM439, SUJ2 |
| IS | 40Cr4Mo3, 20MnCr5, EN24, EN19 |
Weight Chart
| Standard | Grade | Unit | Weight |
|---|---|---|---|
| ASTM | 4140 | kg/m (Round Bar Ø40 mm) | 9.87 |
| ASTM | 4130 | kg/m² (Sheet 3 mm) | 23.55 |
| ASTM | 4340 | kg/m (Bar Ø50 mm) | 15.42 |
| ASTM | 8620 | kg/m (Pipe OD 50.8 mm, WT 3 mm) | 2.78 |
| AISI | 4140 | kg/m² (Plate 10 mm) | 78.50 |
| AISI | 52100 | kg/1000 m (Wire Ø1 mm) | 0.62 |
| AISI | 6150 | kg/m (Round Bar Ø60 mm) | 22.21 |
| AISI | 9310 | kg/m² (Sheet 5 mm) | 39.25 |
| EN | 42CrMo4 | kg/m² (Sheet 6 mm) | 47.10 |
| EN | 34CrNiMo6 | kg/m (Bar Ø25 mm) | 3.86 |
| EN | 16MnCr5 | kg/m (Bar Ø20 mm) | 2.47 |
| JIS | SCM440 | kg/m (Pipe Ø25.4 mm, WT 2 mm) | 0.95 |
| JIS | SNCM439 | kg/m² (Sheet 8 mm) | 62.80 |
| JIS | SUJ2 | kg/1000 m (Wire Ø2 mm) | 2.47 |
| IS | 40Cr4Mo3 | kg/m² (Plate 12 mm) | 94.20 |
| IS | 20MnCr5 | kg/m (Round Bar Ø30 mm) | 5.56 |
| IS | EN24 | kg/m (Bar Ø32 mm) | 6.32 |
| IS | EN19 | kg/m (Bar Ø50 mm) | 15.42 |
Applications of Alloy Steel Forged Fittings in Various Industries
Stellanox Steel’s Carbon Steel products are valued for their strength, machinability, and cost-effectiveness across multiple sectors:
Oil And Gas Industry
Marine Industry
Building And Structural Steel
Power and Energy
Aerospace
Defence
Applications
- Oil & Gas Industry: Drill collars, valve bodies, casing pipes, downhole tools
- Automotive Sector: Crankshafts, axles, gears, drive shafts, engine components
- Aerospace and Defense: Structural parts, landing gear, aircraft fasteners
- Power Generation: Turbine shafts, rotors, fasteners for high-temp environments
- Heavy Equipment and Machinery: Gearboxes, hydraulic cylinders, forging dies
- Construction: Reinforcement bars, tool steels, structural shafts
- Tool Manufacturing: Dies, punches, molds, cutting tools
Benefits
- Enhanced Mechanical Strength & Toughness
- Improved Fatigue Resistance
- Thermal Stability at Elevated Temperatures
- Versatile in Heat Treatments
- Customizable Composition
- Long-Term Cost Efficiency
Frequently Asked Questions
Explore our FAQs for insights on materials, customization, and delivery.
What is the difference between alloy steel and carbon steel?
Alloy steel contains additional elements like chromium, molybdenum, and nickel, giving it superior strength, toughness, and corrosion resistance compared to carbon steel.
Can alloy steel be welded?
Yes, but preheating and post-weld heat treatment may be required depending on the alloy content and grade to avoid cracking or distortion.
What are the most commonly used alloy steel grades?
Some popular grades include AISI 4140, 4130, 8620, 4340, and 42CrMo4 — each suitable for different industrial applications.
Is alloy steel corrosion-resistant?
Alloy steel can offer moderate corrosion resistance, especially if it contains chromium and molybdenum. For highly corrosive environments, stainless or duplex steels may be preferred.
GET IN TOUCH
Our factory’s complete control ensures top-notch quality, prices, and service, reflecting our pride in what we do.
2025 Stellanox Steel |