Carbon and Alloy Steel remain the backbone of industrial manufacturing due to their immense strength, durability, and cost-effectiveness. Jucheng Precision provides comprehensive manufacturing solutions for a wide range of steel grades, from mild steel 1018 to high-tensile 4140. Processing steel requires robust machinery capable of handling high cutting forces. Our facility houses over 150 CNC machines with high rigidity and torque, allowing us to rapidly remove material while maintaining precision. As an IATF 16949 certified partner, we specialize in producing automotive drive components and structural parts. We also offer essential secondary processes, including Heat Treatment (hardening/annealing) and surface plating (Zinc/Black Oxide), to deliver finished, ready-to-assemble parts.
The standard low-carbon "mild steel." 1018 offers an excellent balance of strength, ductility, and superior weldability at a low cost. Ideal for structural brackets, mounting plates, and machine fixtures, it can also be case-hardened to provide a wear-resistant surface while maintaining a tough, reliable core.
A medium carbon steel providing higher strength and hardness than 1018. It responds excellently to induction hardening, making it the premier choice for manufacturing heavy-duty shafts, axles, and gears. 1045 offers a dependable combination of wear resistance and structural integrity for demanding industrial machinery applications.
Known as the "fastest machining steel" globally. This leaded, free-machining carbon steel is optimized for high-speed automatic screw machine operations. It produces exceptional surface finishes and is perfect for high-volume production of intricate bushings, hydraulic fittings, and small precision hardware that do not require welding.
A versatile chromium-molybdenum alloy steel featuring high tensile strength, fatigue resistance, and toughness. Often machined in its pre-hardened state to eliminate heat-treat distortion, it is the go-to material for high-stress automotive axles, industrial gears, and oilfield tools where durability and impact resistance are non-negotiable.
A nickel-chromium-molybdenum alloy renowned for its incredible strength and deep hardenability in thick sections. It offers superior fatigue resistance and toughness. Mission-critical in the aerospace and defense sectors, 4340 is the standard for landing gear, heavy power transmission shafts, and high-performance engine components.
A high-performance alloy specifically designed for case hardening (carburizing). It achieves extreme surface hardness (60+ HRC) while maintaining a highly ductile, impact-resistant core. This "hard-on-the-outside, tough-on-the-inside" profile is ideal for high-impact transmission gears, camshafts, and heavy-duty pins used in rugged environments.
An air-hardening tool steel featuring exceptional dimensional stability during heat treatment. It provides a superior balance between toughness and wear resistance. A2 is the industry benchmark for high-precision stamping dies, master blocks, and industrial knives requiring consistent long-term accuracy and minimal warping during quenching.
A high-carbon, high-chromium steel engineered for maximum abrasion resistance. Hardened to 60-62 HRC, it maintains a keen cutting edge even under severe conditions. This "semi-stainless" tool steel is the premier choice for long-run blanking dies, thread rolling dies, and industrial blades where extreme wear life is required.
A versatile oil-hardening steel known for its ease of machining and excellent dimensional stability. It is the "general purpose" choice for precision gauges, master blocks, and custom cutlery. O1 reaches high hardness with minimal risk of cracking, making it ideal for parts requiring razor-sharp, durable edges.
A hot-work alloy designed to withstand repeated heating and cooling without cracking (heat checking). It maintains high hardness and strength at elevated temperatures. H13 is the global standard for high-pressure die-casting dies, hot extrusion tools, and high-production plastic injection molds handling abrasive materials.
A pre-hardened alloy (28-32 HRC) designed specifically for the plastic injection mold industry. Because it requires no further heat treatment, it eliminates the risk of distortion and cracking. P20 is the most economical and reliable choice for large-scale mold bases, frames, and structural die holders.
| Grade | Common Name | Key Characteristics | Typical Applications |
|---|---|---|---|
| 1018 | Mild Steel / Low Carbon | Excellent weldability and formability. Low cost. Not heat treatable for high hardness. | Mounting plates, brackets, pins, fixtures, general structural parts. |
| 1045 | Medium Carbon Steel | Higher strength than 1018. Can be heat treated for moderate hardness. Good machinability. | Bolts, studs, hydraulic shafts, gears. |
| 4140 | Chromoly Steel | Excellent toughness, impact resistance, and fatigue strength. widely used in high-stress parts. | Axles, crankshafts, gears, milling machine spindles. |
| 4340 | Ni-Cr-Mo Alloy Steel | Superior strength and toughness, even in thick sections. Retains strength at high heat. | Aerospace landing gear, heavy-duty truck parts, power transmission gears. |
| 12L14 | Free Machining Steel | Contains lead/sulfur for extremely fast machining speeds. Low strength, not weldable. | Bushings, inserts, couplers, high-volume screw machine parts. |
| A2 / D2 | Tool Steel | Extremely hard and wear-resistant. Used for cutting tools and dies. | Punch dies, mold inserts, cutting blades, gauges. |
| Capability | Technical Description | Jucheng Advantage |
|---|---|---|
| Heavy-Duty Turning | High-torque CNC turning for machining tough alloy steels into shafts, axles, and cylindrical housings. | Capable of handling large diameter billets with rapid material removal rates for cost efficiency. |
| Hard Part Machining | Machining steel after heat treatment (up to ~60 HRC) using PCBN or specialized carbide tools. | Allows for final sizing after distortion from heat treatment, ensuring high precision. |
| Precision Grinding | Surface and cylindrical grinding to achieve tight tolerances (+/- 0.005mm) and superior surface finishes. | Essential for bearing surfaces and mating parts in automotive and machinery applications. |
| EDM & Wire Cutting | Using electrical discharge to cut hardened tool steels for mold making and complex internal features. | Enables the creation of sharp corners and deep cavities that traditional milling cannot access. |
Heat Treatment Strategy:
Steel is often machined in an annealed (soft) state, then heat-treated for hardness, and finally ground or hard-turned to finish size. This workflow balances machining speed with part durability.
Chip Control:
Low carbon steels (like 1018) can be “gummy” and produce long, stringy chips. We use chip-breaking tool geometries and high-pressure coolant to break chips into manageable sizes, preventing bird-nesting.
Surface Protection:
Unlike Aluminum or Stainless, standard steel rusts easily. Parts must be oiled immediately after machining or plated (Zinc, Nickel, Black Oxide) to prevent corrosion during shipping and storage.
Tool Coatings:
We utilize TiCN or AlTiN coated tools to withstand the high heat generated when machining alloy steels, allowing for faster speeds and longer tool life.
Automotive (IATF 16949 Certified)
Key Parts: Transmission gears, crankshafts, axle shafts, engine brackets.
Why Steel: Alloy steels (like 4140/4340) provide the immense fatigue strength and toughness needed for drivetrain components.
Industrial Machinery
Key Parts: Hydraulic cylinders, machine base plates, heavy-duty fasteners.
Why Steel: 1018 and 1045 steels offer a cost-effective solution for structural parts requiring high rigidity.
Robotics & Automation
Key Parts: Motor mounts, precision guide rails, structural arms.
Why Steel: Provides the mass and stiffness required to dampen vibrations in high-speed robotic systems.
Oil & Gas
Key Parts: Drill bit bodies, valves, high-pressure fittings.
Why Steel: High-strength alloys withstand the extreme pressures and abrasive environments of downhole drilling.
| Density | 7.85 g/cm³ |
| Tensile Strength | 370 - 2000+ MPa |
| Yield Strength | 250 - 1600+ MPa |
| Elongation at Break | 10 - 35 % |
| Elastic Modulus | 190 - 210 GPa |
| Hardness | 120 HB - 60 HRC |
| Thermal Conductivity | 40 - 50 W/m-K |
| Electrical Conductivity | 5 - 15 % IACS |
| Melting Point | 1370 - 1540 °C |
| Max. Part Size | 2000 mm (L) x 800 mm (W) x 600 mm (H) |
