303 Round Bar SUS303 Stainless Steel Bar 303 Hexagonal Bar 303 ss round bar
Close Analogs: AISI Type 303 Se
Key Words: T303, T 303, 303SS, 303 SS, AFNOR Z 10 CNF 18.09 (Fr), UNI X 10 CrNiS 18 09, SUS 303, SS14 2346 (Sweden), B.S. 303 S 21, UNS S30300, AMS 5640 (1), ASME SA194, ASME SA320, ASTM A194, ASTM A314, ASTM A320, ASTM A320, ASTM A473, ASTM A581, ASTM A582, MIL SPEC MIL-S-862, SAE J405 (30303), DIN 1.4305, X12CrNiS188, EN 58M, austenitic, ISO 683/13 17, 18-8
| Component | Wt. % |  | | | | C | Max 0.15 | | | Cr | 18 | | | Fe | 69 | | | | Component | Wt. % | | | | | Mn | Max 2 | | | Mo | Max 0.6 | | | Ni | 9 | | | | Component | Wt. % | | | | | P | Max 0.2 | | | S | Min 0.15 | | | Si | Max 1 | | |
| Physical Properties | Metric | English | Comments |
| |
| Density | 8 g/cc | 0.289 lb/in³ | |
Mechanical Properties |
| |
| Hardness, Brinell | 228 | 228 | |
| Hardness, Knoop | 251 | 251 | Converted from Brinell hardness. |
| Hardness, Rockwell B | 96 | 96 | Converted from Brinell hardness. |
| Hardness, Rockwell C | 19 | 19 | Converted from Brinell hardness. Value below normal HRC range, for comparison only. |
| Hardness, Vickers | 240 | 240 | Converted from Brinell hardness. |
| Tensile Strength, Ultimate | 690 MPa | 100000 psi | |
| Tensile Strength, Yield | 415 MPa | 60200 psi | at 0.2% offset |
| Elongation at Break | 40 % | 40 % | in 50 mm |
| Modulus of Elasticity | 193 GPa | 28000 ksi | tension |
| Poisson's Ratio | 0.25 | 0.25 | Calculated |
| Fatigue Strength | 240 MPa | 34800 psi | annealed sample |
| Fatigue Strength | 330 MPa | 47900 psi | 25% hardened sample |
| Shear Modulus | 77.2 GPa | 11200 ksi | |
Electrical Properties |
| |
| Electrical Resistivity | 7.2e-005 ohm-cm | 7.2e-005 ohm-cm | |
Thermal Properties |
| |
| CTE, linear 20°C | 17.2 µm/m-°C | 9.56 µin/in-°F | from from 0-100°C |
| CTE, linear 250°C | 17.8 µm/m-°C | 9.89 µin/in-°F | at 0-315°C (32-600°F) |
| CTE, linear 500°C | 18.4 µm/m-°C | 10.2 µin/in-°F | at 0-540°C, 18.7 µm/m-C at 0-650°C |
| Specific Heat Capacity | 0.5 J/g-°C | 0.12 BTU/lb-°F | from 0-100°C (32-212°F) |
| Thermal Conductivity | 16.2 W/m-K | 112 BTU-in/hr-ft²-°F | at 100°C (212°F), 21.5 W/m-K at 500°C (930°F) |
| Melting Point | 1400 - 1420 °C | 2550 - 2590 °F | |
| Solidus | 1400 °C | 2550 °F | |
| Liquidus | 1420 °C | 2590 °F |
Product features - 303 stainless steel offers better machinability than 304 stainless steel
- Unpolished (mill) surface has no finish
- Meets ASTM A582 specifications
- Annealed after shaping to modify the metal's properties
- Standard tolerance
|
Product description
The 303 stainless steel round rod has an unpolished (mill) surface, has been annealed, meets American Society for Testing and Materials International ASTM A582 specifications, and has a standard tolerance. The 303 stainless steel grade offers better machinability than general-purpose 304 stainless steel with slightly less corrosion resistance. An austenitic stainless steel, 303 is typically nonmagnetic and can be cold worked to increase its hardness and strength while maintaining most of its formability. The material has been annealed, a method of heating and cooling metal to modify its properties, such as increasing its formability and toughness or decreasing its strength, after it has been shaped.
Stainless steel is an iron alloy with resistance to staining and rusting in many environments where steel would typically degrade. The chemical composition of each grade creates a grain structure that falls into one of five classes: austenitic, duplex, ferritic, martensitic, and precipitation hardening. The austenitic class contains the most formable, weldable, and corrosion-resistant stainless steel grades, but they cannot be heat treated. The duplex class offers high resistance to pitting and chloride stress corrosion cracking. Duplex grades are heat treatable and roughly twice as strong as austenitic grades. The ferritic class contains moderately formable and corrosion-resistant grades compared to other stainless steel classes, but they cannot be heat treated. The martensitic class includes some of the hardest and strongest stainless steel grades that also offer mild corrosion resistance, high hardness, and good formability. Martensitic grades can be heat treated. The precipitation-hardening (PH) class can be heat treated after fabrication to achieve some of the highest hardness ratings in stainless steel.
Tensile strength, used to indicate the material’s overall strength, is the peak stress it can withstand before it breaks. Corrosion resistance describes the material's ability to prevent deterioration caused by atmosphere, moisture, or other medium. Wear resistance indicates the ability to prevent surface damage caused by contact with other surfaces. Toughness describes the material's ability to absorb energy before breaking, while hardness (commonly measured as indentation hardness) describes its resistance to permanent surface deformation. Formability indicates how easily the material can be permanently shaped. Machinability describes how easily it can be cut, shaped, finished, or otherwise machined, while weldability characterizes the ability to be welded. Magnetism characterizes how much the material is repelled by or attracted to a magnet.
