305 Stainless Steel (UNS S30500 / 1.4303) – Low Work Hardening Rate, Exceptional Formability | ZYTC Alloy
At ZYTC Alloy, we pride ourselves on delivering standardized, process-driven, and specialized production and inspection protocols for every order. Our recent shipment of 305 stainless steel strip to Russia—produced via VIM (Vacuum Induction Melting) , conforming to GOST 5582-75, at 0.08mm × 200mm in Hard Condition—exemplifies our commitment to quality and precision. Every product undergoes rigorous testing and inspection before delivery, ensuring that our customers receive only fully certified material.
What is 305 Stainless Steel?
305 stainless steel (UNS S30500, EN 1.4303) is an austenitic chromium-nickel stainless steel renowned for its exceptionally low work hardening rate. This distinctive characteristic sets 305 apart from other austenitic grades such as 304 and 302. The increased nickel content—ranging from 10.5% to 13.0% —reduces the rate of work hardening during cold forming, making 305 stainless steel the material of choice for severe deep drawing and complex forming operations.
Unlike many other austenitic stainless steels, 305 remains non-magnetic after cold working, a property that is critical for electronic components and other applications where magnetic interference must be minimized. Additionally, 305 stainless steel cannot be hardened by heat treatment, ensuring consistent mechanical properties throughout the manufacturing process.
Chemical Composition of 305 Stainless Steel
The chemical composition of 305 stainless steel is carefully balanced to deliver its unique combination of formability, corrosion resistance, and non-magnetic stability. The typical composition ranges are as follows:
| Element | Content (%) |
|---|---|
| Chromium (Cr) | 17.0 – 19.0 |
| Nickel (Ni) | 10.5 – 13.0 |
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
The high nickel content is the defining feature of 305 stainless steel, directly responsible for its low work hardening rate and superior deep drawability. The chromium content provides excellent corrosion resistance comparable to Type 302, while the low carbon content minimizes the risk of intergranular corrosion.
Mechanical Properties of 305 Stainless Steel
305 stainless steel offers a well-balanced set of mechanical properties that make it ideal for cold forming and deep drawing applications. The typical mechanical properties in the annealed condition are:
| Property | Value (Metric) | Value (Imperial) |
|---|---|---|
| Tensile Strength (UTS) | 515 – 620 MPa | 74.7 – 90 ksi |
| Yield Strength (0.2% Offset) | 205 – 260 MPa | 29.7 – 38 ksi |
| Elongation (in 50 mm) | 40 – 55% | 40 – 55% |
| Modulus of Elasticity | 193 GPa | 28,000 ksi |
| Hardness (Rockwell B) | 70 – 90 HRB | 70 – 90 HRB |
The moderate tensile strength combined with exceptional elongation gives 305 stainless steel the ductility required for severe cold forming without intermediate annealing. The low work hardening rate means that 305 can be formed into complex shapes with fewer processing steps, reducing production time and cost.
Key physical properties include:
| Property | Value |
|---|---|
| Density | 7.99 g/cm³ |
| Melting Point | 1,400 – 1,454°C |
| Thermal Conductivity (100°C) | 16.2 W/m·K |
| Coefficient of Thermal Expansion (0-100°C) | 17.3 × 10⁻⁶/°C |
| Electrical Resistivity | 72 μΩ·cm |
Applications of 305 Stainless Steel
Thanks to its low work hardening rate, excellent corrosion resistance, and non-magnetic properties, 305 stainless steel is widely used across multiple industries:
-
Deep Drawn Components – 305 is the preferred grade for cups, pans, mixing bowls, tank covers, and other deep drawn parts that require complex geometries
-
Electronic Components – The non-magnetic nature of 305 stainless steel makes it ideal for electronic parts, mobile device components, and camera components
-
Medical Devices – 305 is used in precision medical instruments and surgical components where corrosion resistance and formability are critical
-
Automotive Engineering – Applications include clutches, brake discs, and other automotive components
-
Kitchen Utensils & Appliances – The excellent surface finish and corrosion resistance make 305 ideal for kitchen equipment and household appliances
-
Fasteners & Cold-Headed Parts – Pens, eyelets, rivets, and cold-headed fasteners benefit from the superior malleability of 305 stainless steel
-
Pump Housings & Industrial Components – 305 provides reliable performance in pump housings and other industrial applications
Why Choose ZYTC Alloy for 305 Stainless Steel?
At ZYTC Alloy, we offer a comprehensive range of 305 stainless steel products:
-
305 Stainless Steel Strip
-
305 Stainless Steel Wire
-
305 Stainless Steel Bar
-
305 Stainless Steel Tube
We also produce 316L-related products and offer custom fabrication services based on customer drawings. Our production strictly complies with ASTM, EN, and AMS standards, including AMS 5514, ASTM A240, and QQ-S-766.
Our VIM (Vacuum Induction Melting) process ensures superior material purity and chemical homogeneity. Every batch is produced under strict quality control protocols, with standardized inspection procedures ensuring that every product meets or exceeds specification requirements before shipment.
With fast delivery, competitive pricing, and uncompromising quality, ZYTC Alloy is your trusted partner for 305 stainless steel and other specialty alloys.
Standards & Equivalents
305 stainless steel is recognized under multiple international standards:
| Standard | Designation |
|---|---|
| AISI / ASTM | 305 |
| UNS | S30500 |
| EN | 1.4303 |
| DIN | X4CrNi18-12 |
| JIS | SUS305 |
| GOST | 06Ch18N11 |
Contact Us
For inquiries about 305 stainless steel or any of our other products, please contact ZYTC Alloy today. Whether you need strip, sheet, wire, bar, tube, or forgings—in standard sizes or custom configurations—we are ready to deliver.
