Our growth depends on the superior equipment, exceptional talents and continuously strengthened technology forces for H13 Mould Steel FLAT BAR, Stainless Steel Wire, H13 Mould Die Steel Round Bar. Our company always adheres to the business philosophy of regarding quality as life, seeking survival by reputation, promoting development through scientific and technological innovation Our team emphasizes the tacit understanding of cooperation, in order to achieve the highest customer satisfaction for our most important mission.
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
We have formed a good reputation and been widely recognized by the majority of users by reassuring 12L14 Hexagonal Free Cutting Steel Bar Hex Steel Bars, satisfying price and inspiring service. We keep improving and perfecting our products and service. After years of development, the company's product categories continue to increase, the production scale and sales scope continue to expand, thus our company has maintained a good and steady development momentum.