Alloy Steel 4140 (42CrMo4 / EN19)
Alloy Steel 4140
Apar Alloys, a leading stockist and supplier, offers Alloy Steel 4140 (42CrMo4 / EN19), a high-performance chromium-molybdenum steel. Known for its exceptional tensile strength, toughness, and wear resistance, it is widely used in automotive, engineering, oil & gas, and heavy machinery. With excellent hardenability, machinability, and uniform strength, it is ideal for manufacturing critical components like gears, shafts, bolts, and connecting rods, ensuring reliable performance in demanding conditions.
The combination of chromium and molybdenum enhances corrosion and oxidation resistance while maintaining mechanical stability at high temperatures. This grade performs exceptionally under fatigue and impact loads, making it suitable for applications requiring both strength and resilience. Its adaptability to heat treatment processes such as quenching and tempering allows precise control of mechanical properties. With a balanced composition and proven reliability, Alloy Steel 4140 continues to be a trusted material for high-stress industrial and engineering applications.
Specifications
| Grade | AISI | UNS | ASTM A276 / A479 | ASTM A182 | EN (W-Nr) | DIN Spec |
|---|---|---|---|---|---|---|
| 4140 | AISI 4140 | G41400 | ASTM A276 / A479 | ASTM A182 | 1.7225 | 42CrMo4 |
| 42CrMo4 | AISI 4140 | G41400 | ASTM A276 / A479 | ASTM A182 | 1.7225 | 42CrMo4 |
General Characteristics
Medium carbon chromium-molybdenum alloy steel
Excellent strength, toughness, and fatigue resistance
Good wear and impact resistance under high-stress conditions
Suitable for heat treatment, including quenching and tempering
Good machinability and dimensional stability
Consistent performance under dynamic load environments
Chemical Composition (nominal) %
| Element | C | Si | Mn | P | S | Cr | Mo | Ni | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 4140 | 0.38–0.43 | 0.10–0.40 | 0.50–0.80 | ≤0.035 | ≤0.040 | 0.90–1.20 | 0.15–0.25 | ≤0.30 | Balance |
| 42CrMo4 | 0.38–0.45 | 0.10–0.40 | 0.60–0.90 | ≤0.025 | ≤0.035 | 0.90–1.20 | 0.15–0.30 | ≤0.30 | Balance |
Applications
Shafts, axles, and durable crankshaft components
Gears, bolts, studs, and fastening elements
Connecting rods, couplings, and mechanical linkages
Tool holders and precision machine components
Oilfield equipment and power transmission parts
Automotive parts and heavy machinery components
Advantages
- High tensile and yield strength with excellent toughness
- Superior hardenability and fatigue resistance
- Ideal for demanding engineering and mechanical applications
- Good machinability and weldability (under controlled conditions)
- Reliable performance in wear- and impact-prone environments
- Maintains stability under heat-treated conditions
Mechanical Properties (Typical at Room Temperature)
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 850 – 1000 |
| Yield Strength (MPa) | 655 |
| Elongation (%) | 20 |
| Hardness (Brinell) | 197 – 255 HB |
Why Choose Apar Alloys
At Apar Alloys, we merge technical expertise with a customer-first approach. Our extensive inventory and global sourcing network ensure clients receive certified materials that meet international standards and project-specific requirements.
Reliable Stockist & Supplier
We maintain a ready-to-dispatch inventory of materials, ensuring fast and dependable delivery for all clients.
Sourced from Trusted Global Mills
All materials are procured from reputed international suppliers, guaranteeing consistent quality and reliability.
Stringent Quality Checks
Each product undergoes thorough inspections and traceable certifications to meet rigorous quality standards.
Custom Sizing & Cutting
We provide tailored solutions, including custom sizing, cutting, and finishing to suit client needs.
Competitive Pricing & Timely Delivery
Apar Alloys offers cost-effective solutions while ensuring prompt delivery across various industries.
Dedicated Client Support
Our professional team delivers personalized assistance, fostering long-term trust and strong client relationships.
Get in Touch
Contact Us
Looking for a dependable partner for your Alloy Steel 4140 (42CrMo4 / EN19) requirements? Contact us today for quotes, technical guidance, or customized supply options for Alloy Steel Round Bars and Pipes.
[Call] +91 98333 89128
301, 3rd floor, A WING, Krishvi Escape, Near Vinay Health Home, Fanaswadi Bhuleshwar, Mumbai - 400002.
Send Mail
