AISI 301 Stainless Steel (UNS S30100)
AISI 301 (UNS S30100) stainless steel is the most susceptible to cold creep strengthening among conventional austenitic stainless steels. Its work hardening rate is extremely high, with each increase in the amount of cold working, the tensile strength and yield strength will increase significantly. Work hardening response is particularly important for structural parts, including angle steel and channel sections, which are expected to have additional strength and stiffness after manufacturing. On the other hand, for deep drawing applications, lower hardening rates are generally preferred and can be obtained in austenitic alloys with higher nickel content (especially types 304, 304L and 305).
SS type 301 has good corrosion resistance in atmospheric conditions, but has poor corrosion resistance in reducing media and chemical media such as acids, alkalis and salts, so it is not recommended for aggressive corrosion environments. 301 steel is mainly used in the cold working state to withstand higher loads, but also expected to reduce the weight of equipment and corrosion-resistant parts.
Datasheet and specifications
The following tables and lists provide the data sheet and specifications of 301 stainless steel, including chemical composition, physical and mechanical properties, heat treatment, welding, etc.
Chemical composition
The chemical composition of the SS 301 material is listed in the following table.
Datasheet 1, The table below shows the composition of AISI 301 stainless steel.
| Chemical Composition SS 301, % | |||||||||||
| ASTM/SAE Type | AISI (UNS) | C, ≤ | Yes, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Cr | No | Mo, ≤ | Cu, ≤ | N, ≤ |
| ASTM 666; ASTM A959; ASTM A240/A240M; SAE J405 |
301 (UNS S30100) | 0.15 | 1.00 | 2:00 | 0.045 | 0.03 | 16.0-18.0 | 6.0-8.0 | – | – | 0.1 |
| SAE AMS 5517 | 18Cr-8Ni (SAE 30301) | 0.15 | 1.00 | 2:00 | 0.040 | 0.03 | 16.0-18.0 | 6.0-8.0 | 0.75 | 0.75 | – |
Grades:
- ASTM 666 : Standard Specification for Annealed or Cold-Worked Austenitic Stainless Steel Sheets, Strips, Plates, and Flat Bars
- ASTM A240/A240M : Chromium and chrome-nickel stainless steel plates, sheets and strips for pressure vessels and general applications
- ASTM A959 : Standard Guide for Specification of Harmonized Standard Grade Compositions for Wrought Stainless Steels
- SAE AMS 5517 : Steel, corrosion resistant, plates and strips
- SAE J405 : Chemical Composition of SAE Forged Stainless Steels
Properties of AISI 301 stainless steel
The data sheets below list the properties of grade 301 stainless steel, including physical properties and mechanical properties.
Physical properties
The physical properties of SS 301 are listed in the table below, such as density, melting point, specific heat, electrical resistivity, modulus of elasticity (modulus of elasticity), thermal conductivity and coefficient of thermal expansion (CTE).
Datasheet 2, properties of AISI 301 – 1 stainless steel.
Grades:
- 10 -6 ·K -1 = 10 -6 /K
- 1Ω mm²/m = 1 μΩ m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1kN/mm2
- 1 MPa = 1 N/mm2
| Physical properties | |
| Density, g/cm3 (lb/in3) | 8 (0.289) |
| Melting point, °C (°F) | 1400-1420 (2550-2590) |
| Specific heat capacity, J/kg·K (Btu/lb ·°F) | 500 (0.12) at 20°C (68°F) |
| Electrical resistivity, μΩ·m | 0.72 at 20°C (68°F) |
| Magnetic permeability | 1.02 (approximate) |
| Elastic Modulus (Modulus of Elasticity), GPa (10 6 psi) | 193 (28) |
| Thermal diffusivity, mm2/s (in2/s) | 4.05 (0.006) 20-100°C (68-212°F) |
| Thermal conductivity, W/m·K (Btu/ft · h ·°F) | 16.2 (9.4) at 100°C (212°F) |
| 21.5 (12.4) at 500°C (932°F) | |
| Coefficient of thermal expansion (CTE), 10 -6 /K (μin./in. ·°F) | 17.0 (9.4) at 0-100℃ (32-212°F) |
| 17.2 (9.6) at 0-315℃ (32-600°F) | |
| 18.2 (10.1) at 0-538℃ (32-1000°F) | |
Mechanical properties
The mechanical properties of AISI 301 stainless steel are given in the data sheet below, including tensile strength, yield strength, elongation, area reduction, Brinell and Rockwell hardness, etc.
Datasheet 3, Properties of Type 301 – 2 Stainless Steel.
| Type 301 Mechanical Properties | |||||||
| ASTM | AISI type (UNS) | Conditions | Tensile strength, MPa (ksi), ≥ | 0.2% yield strength, MPa (ksi), ≥ | Elongation by 50 mm (2 in.), %, ≥ | Brinell hardness (HB), ≤ | Rockwell hardness (HRB), ≤ |
| ASTM A666 | 301 (UNS S30100) | Annealed | 517 (75) | 205 (30) | 40 | 217 | 95 |
| Full Hard | 1275 (185) | 965 (140) | 8 (<0.015 in.); 9 (≥ 0.015 in.) |
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| Super Full Hard | 1860 (270) | 1790 (260) | – | ||||
| Kind of difficult | 1035 (150) | 760 (110) | 15 (<0.015 in.); 18 (≥ 0.015 in.) |
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| 3/4 Hard | 1205 (175) | 930 (135) | 10 (<0.015 in.); 12 (≥ 0.015 in.) |
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| 1/4 (a quarter hard) Hard | 862 (125) | 517 (75) | 25 | ||||
| 1/8 Hard | 690 (100) | 380 (55) | 40 | ||||
| 1/16 Hard | 620 (90) | 310 (45) | 40 | ||||
| SAE AMS 5517 | 18Cr-8Ni (SAE 30301) | – | 862 (125) | 517 (75) | 25 | 252, ≥ | 25 HRC, ≥ |
Heat treatment
Recommended annealing temperature is 1040°C (1900°F)
Heat resistance
| Maximum air service temperatures | ||
| AISI type | Intermittent service | Continuous service |
| 301 | 840°C (1545°F) | 900°C (1650°F) |
Forms
Type 301 has been widely used in coining spoons and forks; Other applications include springs, fasteners, clamps, automotive wheel covers, aircraft structural parts, etc.
Equivalent Material
Grade 301 stainless steel equivalent to Chinese GB, ISO, Japanese JIS and European EN standard (Germany DIN EN, British BSI…).
| Material equivalent to AISI 301 | |||||||||||||||||||
| USA | European | China | Japan | ISO | Australia | India | Russia | Korea | |||||||||||
| Standard | Note (UNS) | Standard | Note | Standard | Class (Steel Number) | Standard | Note | Standard | Note | Standard | Name (ISO number) | Standard | Note | Standard | Note | Standard | Note | Standard | Note |
| AISI; ASTM A666 |
301 (UNS S30100) | SAE AMS 5517 | 18Cr-8Ni (SAE 30301) | EN 10088-1; EN 10088-2; EN 10088-3 |
X5CrNi17-7 (1.4319) | GB/T 1220; GB/T 3280 |
1Cr17Ni7; 12Cr17Ni7 (new designation) |
JIS G4304; JIS G4304; JIS G4305 |
SUS301 | ISO 15510 | X5CrNi17-7 (4319-301-00-I) | ||||||||
Related material: Type 316, 316L, 410, 420, 430, 440, 1.4301 (X5CrNi18-10)
