UNS S30400 304V Medical Stainless Steel

Buy 304V medical stainless steel wire at factory price. VAR double melted austenitic alloy for high purity and uniformity. Surgical instruments, catheters, guide wires.

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304V (UNS S30400) is a premium double-melted austenitic stainless steel specially optimized for medical precision applications. Different from conventional commercial 304 stainless steel, 304V adopts a strict dual smelting process: initial electric arc melting followed by vacuum arc remelting (VAR).

This professional refining process effectively eliminates internal voids, inclusions and impurities, achieving ultra-uniform chemical composition and consistent metallurgical structure. With excellent surface finish, stable mechanical properties and moderate corrosion resistance, 304V has become a cost-effective mainstream material for disposable and reusable precision medical devices.

As a reliable China medical-grade stainless steel supplier,ZYTC Alloy specializes in high-purity 304V stainless steel wires, strips and profiles. We strictly control VAR smelting quality and dimensional tolerance, providing stable, high-reliability raw materials for global medical device manufacturers.

Chemical composition

Composition	UNS S30400 %
Carbon	0.08 max
Manganese	2.00 max
Phosphorus	0.045 max
Sulfur	0.030 max
Silicon	1.00 max
Chromium	18.0 - 20.0
Nickel	8.0 - 10.5
Nitrogen	0.10 max
Iron	Balance

Physical properties

	Metric	English
Density	7.92 g/cm³	0.286 lbs/in³
Modulus of elasticity	196 GPa	28 Mpsi
Electrical resistivity	720 µohms*mm	28.4 µohms*in
Thermal conductivity	16.3 2W/(m*°C)	113 BTUin/(hrft²*°F)
Coefficient of thermal expansion	17.2 µm/(m*°C)	9.5 µin/(in*°F)

*Values calculated at 22 °C [72 °F]

Mechanical properties

Cold worked %	Yield strength	Ultimate tensile strength	Elongation %
0	345 MPa [50 ksi]	738 MPa [107 ksi]	41
20	483 MPa [70 ksi]	965 MPa [140 ksi]	14
37	621 MPa [90 ksi]	1269 MPa [184 ksi]	4.0
50	965 MPa [140 ksi]	1434 MPa [208 ksi]	3.0
60	1103 MPa [160 ksi]	1579 MPa [229 ksi]	2.6
68	1241 MPa [180 ksi]	1703 MPa [247 ksi]	2.7
75	1379 MPa [200 ksi]	1827 MPa [265 ksi]	2.6
80	1482 MPa [215 ksi]	1875 MPa [272 ksi]	2.9
84	1586 MPa [230 ksi]	1993 MPa [289 ksi]	2.5
90	1689 MPa [245 ksi]	2110 MPa [306 ksi]	2.6
93	1724 MPa [250 ksi]	2179 MPa [316 ksi]	2.7
95	1931 Mpa [280 ksi]	2303 MPa [334 ksi]	2.6
All data represent results from 25.4 cm [10 in] test gauge length. Values are typical and may not represent all diameters. Test method will affect results.*

Core Manufacturing & Material Advantages

The biggest highlight of 304V medical stainless steel lies in its advanced vacuum refining technology, which fundamentally upgrades material purity and usability compared with ordinary 304:

Double-melt purification process: Secondary VAR vacuum remelting reduces micro-defects and non-metallic impurities, delivering higher material compactness and uniformity.
Stable comprehensive performance: Uniform internal structure ensures consistent hardness, ductility and corrosion resistance across batches, suitable for precision micro-processing.
Excellent processability: Great ductility, weldability and bending performance, easy to process into ultra-fine wires, tiny needles and complex precision structural parts.
Cost-effective medical solution: Balances medical safety and economic benefits, more affordable than high-end medical alloys while meeting conventional clinical usage standards.

Application Scope & Limitations

Wide Medical Applications

304V stainless steel is widely used in short-term contact and external precision medical devices, covering most conventional minimally invasive and surgical accessory components:

Dental & Orthodontic: Orthodontic arch wires for orthodontic correction
Minimally Invasive Devices: Medical catheters, guide wires and precision mandrels
Surgical Tools: Precision surgical instruments, medical needles and surgical springs
General Medical Accessories: Short-term surgical implant auxiliary parts and precision instrument components

For high-purity VAR refined 304V medical stainless steel with stable quality and complete certifications, contact ZYTC Alloy to get professional solutions and factory competitive quotations.

Contact Information:

Email: daisy@zytcsteel.com
WhatsApp/WeChat: +86 17335753350