With the continuous upgrading of the company's research and the expansion of business scope, our company has gradually realized the transformation to a professional D3 Mould Steel Plate, 65Mn steel strip price per ton, Alloy steel plate sae 4140 supplier. Our company will, as always, be demand-oriented, and take research and development as our driving force. We always adhere to value creation and innovation, strive to win the recognition of customers and partners, constantly expand business areas, and aspire to build a world-class brand! In line with the principle of honest management, we are aggressive and brave to explore, and constantly get new products and mature market channels, finally win an excellent reputation. We are looking forwards the opportunity to serve you.
8620 Hot Rolled Steel Bar Supplier
8620 alloy structural steel bar is a type of low-alloy high-strength steel, belonging to the Ni-Cr-Mo series alloy steel. It exhibits excellent hardenability, weldability, and machinability. After appropriate heat treatment (such as carburizing, quenching and tempering), it can achieve a balance of high hardness, high wear resistance, and good toughness. It is widely used in machinery manufacturing, automotive industry, and other fields with strict requirements on material performance.
Chemical Composition (Mass Fraction, %)
| Element | Content Range |
|---|---|
| C (Carbon) | 0.18-0.23 |
| Si (Silicon) | 0.15-0.35 |
| Mn (Manganese) | 0.70-0.90 |
| P (Phosphorus) | ≤0.035 |
| S (Sulfur) | ≤0.035 |
| Ni (Nickel) | 0.40-0.70 |
| Cr (Chromium) | 0.40-0.60 |
| Mo (Molybdenum) | 0.15-0.25 |
| Cu (Copper) | ≤0.30 |
Functions of Core Elements:
Carbon (C): Enhances the strength and hardness of the steel, providing a foundation for heat treatment strengthening.
Nickel (Ni): Improves toughness, ductility, and low-temperature performance, and enhances impact resistance.
Chromium (Cr): Increases hardenability, wear resistance, and corrosion resistance, and optimizes surface hardness.
Molybdenum (Mo): Refines grain size, improves high-temperature strength and temper resistance, and reduces temper brittleness.
Forged steel bar
Basic Physical Properties
Density: 7.85 g/cm³ (at room temperature)
Melting Point: 1420-1460℃
Thermal Conductivity: 42 W/(m·K) (at 20℃)
Specific Heat Capacity: 460 J/(kg·K) (at 20℃)
Coefficient of Linear Expansion: 11.7×10⁻⁶/℃ (20-100℃)
Mechanical Properties (Annealed State, Hardness ≤197 HB)
Tensile Strength: ≥640 MPa
Yield Strength: ≥370 MPa
Elongation (δ5): ≥18%
Reduction of Area (ψ): ≥40%
Impact Energy (Akv, 20℃): ≥63 J
Heat Treatment Characteristics
Carburizing Temperature: 900-950℃
Quenching Temperature: 840-860℃ (oil cooling)
Tempering Temperature: 150-200℃ (low-temperature tempering to maintain high hardness)
Surface Hardness after Carburizing: ≥58 HRC; Core Hardness: 30-45 HRC
Stock 8620 steel bar
Our Service:
We control the quality of every detail and provide you with quality service.
1: Strict selection of high-quality steel raw materials that meet the standards, and upper materials forging upper products.
2: Strictly control the production of steel products during the forging and casting process. Don't take small things for granted, and achieve true quality control.
3: Strictly control each link of product sampling test, keep improving, and select quality.
4: In strict accordance with international standards
In addition to the Professional 1.6523 8620 Sncm220 20CrNiMo Alloy Steel Bar itself, we also have a reputation for high quality and efficiency in after-sales service and after-maintenance. Moreover, the company stays unique among its competitors due to its superior standard of quality in production, and its efficiency and flexibility in business support. We have provided a reliable guarantee for the pursuit of "zero defect" production.