AISI 309 Stainless Steel Data Sheet
Stainless steel, austenitic, AISI 309, annealed
AISI 309 Stainless Steel General information
| Designation | |
| AISI 309, wrought | |
| Condition | Solution annealed |
| UNS number | S30900 |
| US name | ASTM WP309, ASTM S30941, ASTM S30940, ASTM S30909, ASTM S30908, ASTM S30900, ASTM CR309, ASME 309, AMS 7490, AMS 5650, AMS 5523 |
| EN name | ~X6CrNi23-13, ~X12CrNi23-13 |
| EN number | ~1.4835, ~1.4833 |
| ISO name | ~X6CrNi23-13, ~X12CrNi23-13, ~X12crNi23-13, ~formerly Type 15 |
| GB (Chinese) name | 2Cr23Ni13, 0Cr23Ni13(-R), 0Cr23Ni13(-Q), 0Cr23Ni13 |
| JIS (Japanese) name | SUS309TP, SUS309TB, SUS309STPY, SUS309STP, SUS309STB, SUS309S, SUS 309 TF, SUH309 |
AISI 309 Stainless Steel Typical uses
| Typical uses |
| Carburizing boxes, electrical parts, furnace parts, heat exchangers, heat-treatment baskets, oil-burner parts, welding filler wire and electrodes. |
AISI 309 Stainless Steel Composition detail
| C (carbon) | 0 | – | 0.2 | % |
| Cr (chromium) | 22 | – | 24 | % |
| Fe (iron) | 57.7 | – | 66 | % |
| Mn (manganese) | 0 | – | 2 | % |
| Ni (nickel) | 12 | – | 15 | % |
| P (phosphorus) | 0 | – | 0.045 | % |
| S (sulfur) | 0 | – | 0.03 | % |
| Si (silicon) | 0 | – | 1 | % |
AISI 309 Stainless Steel Physical properties
| Density | 7.6 | – | 8 | g/cm3 |
AISI 309 Stainless Steel Mechanical properties
| Young’s modulus | 196 | – | 204 | GPa |
| Specific stiffness | 24.8 | – | 26.5 | MN.m/kg |
| Yield strength (elastic limit) | 205 | – | 310 | MPa |
| Tensile strength | 515 | – | 620 | MPa |
| Specific strength | 26.3 | – | 39.8 | kN.m/kg |
| Elongation | 30 | – | 50 | % strain |
| Compressive strength | 205 | – | 310 | MPa |
| Flexural modulus | 196 | – | 204 | GPa |
| Flexural strength (modulus of rupture) | 205 | – | 310 | MPa |
| Shear modulus | 76 | – | 81 | GPa |
| Bulk modulus | 139 | – | 152 | GPa |
| Poisson’s ratio | 0.265 | – | 0.275 | |
| Shape factor | 62 | |||
| Hardness – Vickers | 205 | – | 225 | HV |
| Hardness – Rockwell B | 80 | – | 90 | HRB |
| Hardness – Rockwell C | 4 | – | 17 | HRC |
| Hardness – Brinell | 160 | – | 207 | HB |
| Elastic stored energy (springs) | 268 | – | 329 | kJ/m3 |
| Fatigue strength at 10^7 cycles | 268 | – | 307 | MPa |
| Fatigue strength model (stress range) Parameters: Stress Ratio = -1, Number of Cycles = 1e7cycles | 233 | – | 353 | MPa |
AISI 309 Stainless Steel Impact & fracture properties
| Fracture toughness | 64 | – | 78 | MPa.m0.5 |
| Toughness (G) | 20.7 | – | 30.2 | kJ/m2 |
AISI 309 Stainless Steel Thermal properties
| Melting point | 1400 | – | 1450 | °C |
| Maximum service temperature | 1e3 | – | 1.1e3 | °C |
| Minimum service temperature | -200 | °C | ||
| Thermal conductivity | 13 | – | 19 | W/m.°C |
| Specific heat capacity | 490 | – | 530 | J/kg.°C |
| Thermal expansion coefficient | 14 | – | 16 | µstrain/°C |
| Thermal shock resistance | 67.9 | – | 105 | °C |
| Thermal distortion resistance | 0.861 | – | 1.28 | MW/m |
| Latent heat of fusion | 260 | – | 285 | kJ/kg |
AISI 309 Stainless Steel Electrical properties
| Electrical resistivity | 73 | – | 83 | µohm.cm |
| Electrical conductivity | 2.08 | – | 2.36 | %IACS |
| Galvanic potential | -0.25 | – | -0.17 | V |
AISI 309 Stainless Steel Magnetic properties
| Magnetic type | Non-magnetic |
AISI 309 Stainless Steel Optical, aesthetic and acoustic properties
| Transparency | Opaque | |||
| Acoustic velocity | 4980 | – | 5150 | m/s |
| Mechanical loss coefficient (tan delta) | 9.5e-4 | – | 0.0013 | |
AISI 309 Stainless Steel Processing properties
| Metal casting | Unsuitable |
| Metal cold forming | Acceptable |
| Metal hot forming | Acceptable |
| Metal press forming | Acceptable |
| Metal deep drawing | Acceptable |
| Machining speed | 21.3 – m/min |
| Weldability Notes: Preheating and post weld heat treatments are not required | Excellent |
| Weldability – MIG | Excellent |
| Weldability – plasma | Excellent |
| Weldability – SAW | Excellent |
| Weldability – TIG | Excellent |
| Brazeability | Good |
| Carbon equivalency | 0.933 – 1.35 |
AISI 309 Stainless Steel Durability
| Water (fresh) | Excellent |
| Water (salt) | Excellent |
| Weak acids | Excellent |
| Strong acids | Acceptable |
| Weak alkalis | Excellent |
| Strong alkalis | Excellent |
| Organic solvents | Excellent |
| Oxidation at 500C | Excellent |
| UV radiation (sunlight) | Excellent |
| Galling resistance (adhesive wear) Notes: Aluminum bronze is the most suitable mating material to minimize galling. | Limited use |
| Flammability | Non-flammable |
AISI 309 Stainless Steel Corrosion resistance
| Pitting resistance equivalent number (PREN) | 22 – 24 |
| Pitting and crevice corrosion | Medium (20-30) |
| Stress corrosion cracking Note: Rated in chloride; Other susceptible environments: Hydrogen sulfide | Slightly susceptible |
| Intergranular (weld line) corrosion | Excellent |
| Inorganic acids | Moderate |
| Organic acids | Moderate |
| Alkalis | Moderate |
| Humidity / water | Excellent |
| Sea water | Moderate |
| Sour oil and gas | Moderate |
AISI 309 Stainless Steel Standards with similar compositions-Equivalent Grades
| Canada: 309 to CSA G110.3, 309 to CSA G110.6, 309S to CSA G110.3, 309S to CSA G110.6, 309S to CSA G110.9 |
| China: 0Cr23Ni13 to GB 1220, 0Cr23Ni13 to GB 1221, 0Cr23Ni13 to GB 13296, 0Cr23Ni13 to GB 4237, 0Cr23Ni13 to GB 4238, 0Cr23Ni13 to GB/T 14976, 0Cr23Ni13 to GB/T 3280, 0Cr23Ni13 to GB/T 4239, 0Cr23Ni13 to GB/T 4356, 0Cr23Ni13 to GB/T 6725, 0Cr23Ni13(-Q) to GB/T 4240, 0Cr23Ni13(-R) to GB/T 4240, 2Cr23Ni13 to GB 1221, 2Cr23NI13 to GB 13296, 2Cr23Ni13 to GB 4238 |
| France: Z15CN24.13 to AFNOR NF A35-586 |
| Germany: 1.4833 to DIN EN 10095, 1.4833 to DIN SEW 470, X7CrNi2314 to DIN EN 10095, X7CrNi2314 to DIN SEW 470 |
| India: 15Cr24Ni13 to IS 9516, TP309 to IS 11714/5, X15Cr24Ni13 to IS 1570/5, X15Cr24Ni13 to IS 6911 |
| International: X12crNi23-13 to ISO 16143-3, X12CrNi23-13 to ISO 4955 |
| Italy: X16CrNi2314 to UNI 6901, X16CrNi2314 to UNI 6904, X16CrNi2314 to UNI 8317, X6CrNi2314 to UNI 6901, X6CrNi2314 to UNI 7500, X6CrNi2314 to UNI 8317 |
| Japan: SUH309 to JIS G4311, SUH309 to JIS G4312, SUS 309 TF to JIS G3467, SUS309S to JIS G4303, SUS309S to JIS G4304, SUS309S to JIS G4305, SUS309S to JIS G4306, SUS309S to JIS G4307, SUS309S to JIS G4308, SUS309S to JIS G4309, SUS309STB to JIS G3463, SUS309STP to JIS G3459, SUS309STPY to JIS G3468, SUS309TB to JIS G3463, SUS309TP to JIS G3459 |
| Mexico: 309 to NMX-B-83, 309S to NMX-B-83, MT309S to NMX-B-171 |
| Russia: 20KH23N13 to GOST 5632 |
| South Korea: STR 309 to KS D 3731, STR 309 to KS D 3732, STS 309S to KS D 3706, STS 309S-W1 to KS D 3703, STS309S to KS D 3692, STS309S to KS D 3698, STS309S to KS D 3705, STS309STPY to KS D 3588 |
| UK: 309S20 to BS 1554, X12CrNi23-13 to BS EN 10088-1, X12CrNi23-13 to BS EN 10296-2, X12CrNi23-13 to BS EN 10297-2 |
| USA: 309 to ASTM A167-99, 309 to ASTM A312/A312M, 309 to ASTM A409/A409M, 309 to ASTM A473, 309 to FED QQ-S-763F, 309 to FED QQ-S-766D, 309 to MIL-S-862B, 309S to ASTM A473, 5523 to AMS 5523, 5574 to AMS 5574, 5650 to AMS 5650, 7490 to AMS 7490, CR309 to ASTM A403/A403M, MT309S to ASTM A511, MT-309S to ASTM A554, MT-309S-Cb to ASTM A554, S30900 to ASTM A276, S30900 to ASTM A314-97, S30900 to ASTM A580/A580M-98, S30900 to ASTM F2281, S30908 to ASTM A276, S30908 to ASTM A314-97, S30908 to ASTM A479/A479M, S30908 to ASTM A580/A580M-98, S30908 to ASTM A959, S30908 to SAE J405, TP309S to ASTM A213/A213M, TP309S to ASTM A409/A409M, UNS S30900, UNS S30908, UNS S30940, WP309 to ASTM A403/A403M |
| Tradenames: APFR, BOHLER H566, CROLOY 25-12, DEUTRO 20/15, EASTERN STAINLESS TYPE 309S, ES-25-12, FIRTH-VICKERS 309, NICKROFRY 345, PYROFIX-3, RANKIN 309-16, SANDVIK 309-15, SCHNEIDER 60, SLATER TYPE 309, THERMAX 10A, TIMKEN 25-12 (309 TP), U.S.S. 25-12, U.S.S. 25-12 TI, UNILOY 309 |
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