SAE4140 is a high-quality alloy steel known for its excellent mechanical properties, including high tensile strength, toughness, and wear resistance. However, what truly sets our SAE4140 induction hardened chrome bar apart is the advanced heat treatment and induction hardening processes we employ to enhance its performance.
Precision Heat Treatment Of YUTONG SAE4140 Induction Hardened Chrome Bar
Heat treatment is not just a step in our production process— Our engineers meticulously tailor the thermal profile of 4140 rod material to achieve the ideal balance between hardness and toughness:
Stage 1: Normalization
The raw steel is heated to 850–900°C in a controlled atmosphere furnace, homogenizing its microstructure to eliminate internal stresses and ensure uniformity.Stage 2: Quenching & Tempering
Rapid oil quenching transforms the austenitic structure into martensite, achieving a hardness of 45–50 HRC. Subsequent tempering at 150–200°C reduces brittleness while retaining core strength, ensuring resistance to impact and fatigue.
This dual-phase treatment guarantees a chrome bar capable of withstanding extreme loads and cyclic stresses, making it ideal for hydraulic cylinders, heavy-duty shafts, and precision gears.
Our commitment to innovation and quality ensures that our SAE4140 or SAE430 Hardened Chrome Bar meets the highest benchmarks:
✅ End-to-End Control
From raw material sourcing to final inspection, we oversee every step in-house. Our ISO-certified labs verify chemical composition, hardness, and microstructure integrity, ensuring compliance with ASTM, DIN, and JIS standards.
✅ Customization Capabilities
Need a specific hardness gradient or chrome plating thickness? Our flexible processes adapt to your specifications, whether for aerospace, construction, or robotics.
✅ Scalability & Speed
With automated production lines and a 50,000-ton annual capacity, we deliver bulk orders with lead times 20% faster than industry averages—without sacrificing quality.
✅ Global Recognition
Trusted by OEMs in Europe, North America, and Asia, our chrome bars are proven in applications ranging from offshore drilling equipment to high-speed CNC machinery.
