304/304L Stainless Steel
UNS S30400/S30403
Description
304 stainless steel is also known as 18/8 stainless steel, meaning that the steel containing more than 18% chromium and more than 8% nickel. The alloy is a one of the most common stainless steel materials in the market. 304 stainless steel has a wide range of applications with good corrosion resistance, heat resistance, low temperature strength and mechanical properties, good stamping, bending and hot processing. It also has no heat treatment hardening phenomenon under the operating temperature of -196 °C to 800 °C. 304L stainless steel is a low carbon version of 304 stainless steel. Through the controlled addition of nitrogen, it is common for 304L to meet the mechanical properties of 304 straight grade. As a result, most products are dual certified as 304 and 304/304L.
Chemical Component
| Ni | Cr | Mn | Si | C | S | P | N | Fe |
|---|---|---|---|---|---|---|---|---|
| 8.0-10.5% | 18.0-20.0% | 2.0% max | 0.75% max | 0.03% max | 0.03% max | 0.045% max | 0.10% max | Balance |
Basic Information
| Items | 304/304L Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A008 |
| Density | 0.285 lb/in3 |
| Electrical Resistivity, Ohm-circ mil/ft | 433 |
| Poisson's Ratio | 0.3 |
| Melting Range | 2550-2590 °F |
| Coefficient of Thermal Expansion, in/in°F x 10-6 | 70-212 °F: 9.2 |
| Thermal Conductivity, Btu·ft/ft2·hr·°F | At 212 °F: 9.4; At 392 °F: 12.4 |
| Modulus of Elasticity Dynamic, psi x 106 | At 70 °F: 29 |
Material Forms
Alfa Chemistry offers 304/304L stainless steel in a variety of forms, including Concentric Reducers, Fittings, Flanges, Hex Bar, Pipe, Plate, Sheet, Stub Ends, Tees, Tubing, Wire, Strip.
Mechanical Properties
- Representative tensile properties
| Ultimate Tensile Strength | 0.2% Yield Strength | Elongation | Hardness MAX |
|---|---|---|---|
| 75 ksi | 30 ksi | 40% | 201 Brinell |
- Typical tensile and impact properties
| Temperature | Ultimate Tensile Strength | 0.2% Yield Strength | HCharpy Impact V-notch |
|---|---|---|---|
| -425 °F | 250 ksi | 100 ksi | 85-320 ft-lbs |
| -320 °F | 230 ksi | 70 ksi | 85 ft-lbs |
| -100 °F | 150 ksi | 50 ksi | - |
| 70 °F | 90 ksi | 35 ksi | 150 ft-lbs |
| 400 °F | 70 ksi | 23 ksi | - |
| 800 °F | 66 ksi | 19 ksi | - |
| 1200 °F | 48 ksi | 15.5 ksi | - |
| 1500 °F | 23 ksi | 23 ksi | - |
Specifications
ASME: SA 240, SA 276, SA 312, SA 479
AMS: 5511, 5513, 5639, 5647
Features
- Good general corrosion resistance
- Ease of cleaning
- Excellent strength and toughness at cryogenic temperatures
- Good formability
- Good weldability
Applications
- Food processing and handling
- Heat exchangers
- Chemical process vessels
- Conveyors
- Architectural
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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Alfa Chemistry is a manufacturer of standard & custom specialty metals & alloys. We stock a wide variety of alloys in different shapes and specifications. If you can't find the product or specification you need, please contact us directly.
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