Customize various 303/304 Yiche stainless steel round bars

### Introduction to Stainless Steel Free-Machining Bars: 303, 304, and 316 Grades

Stainless steel is a versatile and widely used material in various industries due to its excellent corrosion resistance, strength, and durability. Among the different types of stainless steel, free-machining grades such as 303, 304, and 316 are particularly valued for their ease of machining and high production efficiency. These grades are commonly used in applications where precision machining is required, and they are available in various sizes and shapes to meet specific customer needs.

### 1. **303 Stainless Steel Free-Machining Bar**

#### **Product Overview:**
303 stainless steel is an austenitic stainless steel that has been specifically designed for improved machinability. It contains added sulfur, which enhances its machining characteristics, making it one of the most easily machined stainless steels available. This grade is non-magnetic in the annealed condition but may become slightly magnetic after cold working.

#### **Chemical Composition:**
- **Carbon (C):** 0.15% max
- **Manganese (Mn):** 2.00% max
- **Phosphorus (P):** 0.20% max
- **Sulfur (S):** 0.15% min
- **Silicon (Si):** 1.00% max
- **Chromium (Cr):** 17.00-19.00%
- **Nickel (Ni):** 8.00-10.00%

#### **Mechanical Properties:**
- **Tensile Strength:** 620 MPa (90 ksi)
- **Yield Strength:** 240 MPa (35 ksi)
- **Elongation:** 40% in 50 mm
- **Hardness:** Brinell 190 (typical)

#### **Applications:**
303 stainless steel is widely used in applications where machining is a primary requirement. Common uses include:
- **Fasteners:** Screws, bolts, and nuts
- **Shafts:** Precision-machined shafts and spindles
- **Valve Components:** Valve stems, fittings, and other components
- **Gears and Bushings:** Components requiring high precision and smooth finishes
- **Medical Instruments:** Surgical tools and dental equipment

#### **Advantages:**
- **Excellent Machinability:** The addition of sulfur improves chip breaking and reduces tool wear.
- **Good Corrosion Resistance:** Suitable for environments with mild corrosive conditions.
- **High Production Efficiency:** Allows for faster machining speeds and reduced production times.

### 2. **304 Stainless Steel Free-Machining Bar**

#### **Product Overview:**
304 stainless steel is the most commonly used austenitic stainless steel, known for its excellent corrosion resistance and formability. The free-machining version of 304, often referred to as 304F, contains added sulfur to improve machinability. This grade is non-magnetic in the annealed condition and has good weldability and formability.

#### **Chemical Composition:**
- **Carbon (C):** 0.08% max
- **Manganese (Mn):** 2.00% max
- **Phosphorus (P):** 0.045% max
- **Sulfur (S):** 0.03% min
- **Silicon (Si):** 1.00% max
- **Chromium (Cr):** 18.00-20.00%
- **Nickel (Ni):** 8.00-10.50%

#### **Mechanical Properties:**
- **Tensile Strength:** 515 MPa (75 ksi)
- **Yield Strength:** 205 MPa (30 ksi)
- **Elongation:** 40% in 50 mm
- **Hardness:** Brinell 201 (typical)

#### **Applications:**
304 stainless steel is used in a wide range of applications, particularly in industries where corrosion resistance is critical. Common uses include:
- **Food Processing Equipment:** Tanks, piping, and conveyors
- **Kitchen Equipment:** Sinks, countertops, and utensils
- **Chemical Equipment:** Storage tanks, heat exchangers, and piping
- **Architectural Applications:** Trim, molding, and decorative elements
- **Medical Devices:** Implants, surgical instruments, and diagnostic equipment

#### **Advantages:**
- **Superior Corrosion Resistance:** Excellent resistance to a wide range of corrosive environments, including acids, alkalis, and chlorides.
- **Good Machinability:** The addition of sulfur improves machining performance.
- **High Strength and Durability:** Suitable for demanding applications.
- **Wide Availability:** Easily sourced and available in various forms and sizes.

### 3. **316 Stainless Steel Free-Machining Bar**

#### **Product Overview:**
316 stainless steel is an austenitic stainless steel that contains molybdenum, which enhances its corrosion resistance, particularly in chloride environments. The free-machining version of 316, often referred to as 316F, contains added sulfur to improve machinability. This grade is non-magnetic in the annealed condition and offers excellent resistance to pitting and crevice corrosion.

#### **Chemical Composition:**
- **Carbon (C):** 0.08% max
- **Manganese (Mn):** 2.00% max
- **Phosphorus (P):** 0.045% max
- **Sulfur (S):** 0.03% min
- **Silicon (Si):** 1.00% max
- **Chromium (Cr):** 16.00-18.00%
- **Nickel (Ni):** 10.00-14.00%
- **Molybdenum (Mo):** 2.00-3.00%

#### **Mechanical Properties:**
- **Tensile Strength:** 515 MPa (75 ksi)
- **Yield Strength:** 205 MPa (30 ksi)
- **Elongation:** 40% in 50 mm
- **Hardness:** Brinell 217 (typical)

#### **Applications:**
316 stainless steel is used in applications where superior corrosion resistance is required, particularly in harsh environments. Common uses include:
- **Marine Equipment:** Boat fittings, propellers, and offshore platforms
- **Chemical Processing:** Reactors, piping, and storage tanks
- **Pharmaceutical Equipment:** Tanks, piping, and valves
- **Medical Implants:** Orthopedic implants and surgical instruments
- **Food and Beverage Industry:** Equipment exposed to corrosive cleaning agents

#### **Advantages:**
- **Enhanced Corrosion Resistance:** The addition of molybdenum provides superior resistance to chlorides and other corrosive agents.
- **Excellent Machinability:** The free-machining version allows for efficient and precise machining.
- **High Temperature Resistance:** Suitable for use in high-temperature environments.
- **Biocompatibility:** Ideal for medical and pharmaceutical applications.

### Customization and Manufacturing Capabilities

Our company specializes in the production of custom-sized and shaped stainless steel free-machining bars. We understand that different applications require specific dimensions and configurations, and we are equipped to meet these needs with precision and efficiency.

#### **Custom Sizes:**
We offer a wide range of standard sizes, but we also provide custom sizes to meet unique requirements. Whether you need small-diameter bars for intricate components or large-diameter bars for heavy-duty applications, we can accommodate your specifications.

#### **Custom Shapes:**
In addition to standard round bars, we can produce bars in various shapes, including:
- **Hexagonal Bars:** Ideal for fasteners and fittings
- **Square Bars:** Suitable for structural applications
- **Flat Bars:** Used in construction and manufacturing
- **Special Profiles:** Custom profiles designed to meet specific application needs

#### **Surface Finishes:**
We offer a variety of surface finishes to enhance the performance and appearance of our stainless steel bars, including:
- **Hot Rolled:** A rough finish suitable for further processing
- **Cold Drawn:** A smooth finish with tighter tolerances
- **Polished:** A high-gloss finish for aesthetic applications
- **Pickled and Passivated:** A finish that enhances corrosion resistance

#### **Quality Assurance:**
Our manufacturing process is guided by strict quality control measures to ensure that every product meets the highest standards. We conduct rigorous testing, including:
- **Chemical Analysis:** To verify the composition of the alloy
- **Mechanical Testing:** To ensure the material meets specified strength and hardness requirements
- **Dimensional Inspection:** To confirm that the bars meet precise size and shape specifications
- **Surface Inspection:** To ensure the finish meets the required standards

### Conclusion

Stainless steel free-machining bars, particularly grades 303, 304, and 316, are essential materials in industries that require precision machining and high production efficiency. These grades offer excellent machinability, corrosion resistance, and strength, making them suitable for a wide range of applications. Our company is committed to providing high-quality, custom-sized, and shaped stainless steel bars to meet the unique needs of our customers. With our advanced manufacturing capabilities and strict quality control measures, we ensure that our products meet the highest standards of performance and reliability.

Whether you need standard sizes or custom configurations, we are here to provide the stainless steel solutions you need for your specific applications. Contact us today to discuss your requirements and learn more about our products and services.