301 Stainless Steel Sheet
301 is an austenitic, chromium-nickel stainless steel.This alloy is non-magnetic in the annealed condition, but becomes magnetic when cold worked. Within the scope of the ASTM Type 301 specification, chemical composition and processing modifications can result in a wide range of engineered material properties targeted at specific applications. Type 301 is available in the annealed as wells a variety of temper-rolled conditions. High strength and excellent corrosion resistance make Type 301 useful for a wide variety of applications. Typical uses include aircraft structural parts, trailer bodies, diaphragms, utensils, architectural and automotive trim, automobile wheel covers, roof drainage products, tablewear, storm door frames, conveyor belts, sinks, subway cars and appliances.
Properties
| Grade | SS301/12Cr17Ni7 |
| Chemical Composition(%) | Carbon (C): 0.15 max. Manganese (Mn): 2.00 max. Phosphorus (P): 0.045 max. Sulfur (S): 0.030 max. Silicon (Si): 0.75 max. Chromium (Cr): 16.0 – 18.00 Nickel (Ni): 6.00 – 8.00 Nitrogen (N): 0.10 max. Iron (Fe): Balance |
| Mechanical Property | UTS,ksi. (MPa): 120 (827) 0.2% YS, ksi. (MPa): 45 (310) Elongation,% in 2″ (50.8 mm): 60 Rockwell Hardness (B): 86 |
Characteristics
Corrosion Resistance
Type 301 exhibits corrosion resistance comparable to Types 302 and 304 in most mild service conditions. Resistance to food service requirements and atmospheric corrosion is excellent. Stress cracking resistance is similar to Type 304. The optimal corrosion resistance is obtained in the cold worked then annealed condition. When Type 301 is heated or cooled slowly through a temperature range of 800 – 1600 °F (427 – 871 °C) without subsequent annealing, it may undergo carbide precipitation that may result in intergranular corrosion.
Oxidation Resistance
The maximum temperature to which Type 301 can be exposed continuously without appreciable scaling is about 1600 °F (871 °C). For intermittent exposure, the maximum exposure temperature is about 1450 °F (788 °C).
Heat Treatment
Type 301 is non-hardenable by heat treatment. Annealing: Heat to 1900 – 2050 °F (1038 – 1121 °C), then water quench. Stress Relief Annealing: Heat to 500 – 900 °F (260 – 482 °C), then air cool.
Cold Working
High hardness and strength for structural applications are achieved through cold working. In addition to the annealed condition 110 ksi. (758 MPa) minimum tensile strength, Type 301 strip is normally produced in various cold rolled tempers up to full hard 185 ksi. (1276 MPa) minimum tensile strength.
Formability
Type 301 can be readily formed and drawn. Due to its high work-hardening rate, intermediate annealing may be necessary for severe drawing and forming operations. Type 301 may not be suitable in certain severe forming applications where multiple forming operations are required.
Weldability
The austenitic class of stainless steels is generally considered to be weldable by the common fusion and resistance techniques. Special consideration is required to avoid weld “hot cracking” by assuring formation of ferrite in the weld deposit. This particular alloy is generally considered to have similar weldability than the most common alloy of this stainless class, Type 304L. A major difference is the high chrome content for this alloy, which can cause the weld heat-affected-zones to be susceptible to intergranular corrosion in certain environments. When a weld filler is needed, AWS E/ER 308 is most often specified.