After years of pioneering and enterprising, our company has built a modern production line of AR500 Abrasion Resistant Steel Plate, 4130 Chromoly Tube, Titanium Target. The continuous deepening of global economic integration and the development of science and technology have provided necessary conditions for companies from various countries and regions to cooperate and exchange on a global scale. We solemnly promise that we will continuously improve the service quality and satisfy customers while ensuring the advanced nature, reliability and stability of the equipment.
Produce name sum24l free cutting steel bar
AISI SAE 12L14/JIS SUM24L free cutting steel bar
SUM24L free-cutting structural steel is a Japanese standard. SUM24L free-cutting structural steel is a kind of steel that is easy to be cut by turning, milling, drawing, planing, drilling, etc., also called steel for automatic machine tool processing, referred to as automatic steel.
Sum24l Free Cutting Steel Bar for hardware tool
Basic Physical Properties
Density: 7.85 g/cm³ (at room temperature)
Melting Point: 1420-1460℃
Thermal Conductivity: 45 W/(m·K) (at 20℃)
Specific Heat Capacity: 470 J/(kg·K) (at 20℃)
Coefficient of Linear Expansion: 11.5×10⁻⁶/℃ (20-100℃)
Magnetism: Magnetic (ferrite + pearlite structure)
Mechanical Properties (Delivery Condition: Hot-Rolled or Cold-Drawn, Typical Values)
| Performance Indicator | Hot-Rolled Condition | Cold-Drawn Condition (Diameter ≤ 20mm) |
|---|---|---|
| Tensile Strength (σb) | ≥ 420 MPa | ≥ 520 MPa |
| Yield Strength (σs) | ≥ 245 MPa | ≥ 420 MPa |
| Elongation (δ5) | ≥ 22% | ≥ 10% |
| Reduction of Area (ψ) | ≥ 36% | ≥ 25% |
| Brinell Hardness (HB) | ≤ 170 | ≤ 200 |
Core Machinability Advantages
Machining Efficiency: Compared with ordinary low-carbon steel (e.g., Q235), the cutting speed can be increased by 20%-30%, and the processing time per piece can be reduced by 15%-25%. It is suitable for automated production lines (such as batch processing with CNC lathes).
Tool Life: Due to the lubricating and drag-reducing effects of Pb and MnS, the tool wear rate is reduced by 30%-50%. It is especially suitable for long-term continuous use of high-speed steel (HSS) or cemented carbide tools.
Surface Quality: The surface roughness (Ra) of the machined parts can reach 1.6-3.2μm, which can meet the surface requirements of most general parts without additional polishing.
Chip Breaking Performance: Chips are easy to break into short coils or granules, avoiding 缠绕 (tangling) around tools or workpieces and reducing cleaning time during the processing.
1117 flat bar
Frequently Asked Questions:
1) Q. What is your MOQ?
You only need to purchase one and we can ship it to you.
(2) Q: How to buy?
You can email us directly and we will contact you in time.
(3) Q. Are you a factory or a trader?
A: We are an enterprise integrating industry and trade. We have our own factory and our own international trade team.
Our Service
Our firm has a excellent assurance procedure happen to be established for 12L14 Free Cutting Bright Mild Cold Drawn Steel Rod. Our goal is to strive to achieve steady improvement in product quality with competitive prices to deliver it timely and reliable ensuring customers' satisfaction with the service. We emphasize the introduction of key talents, making good use of existing talents, and cultivating future talents.