304L has oxidation resistance to a maximum temperature of 1650° F (899° C) continuously without appreciable scaling. The maximum temperature for intermittent exposure is 1500° F (816° C). Since 304L is an extra low-carbon variation of 304 it can often be used in the "as-welded" condition (without annealing), even in severe corrosive conditions, except for applications specifying stress relief. 304L has good welding characteristics and can be welded by all standard methods but attention needs to be paid to avoid weld "hot cracking". Welding may be followed by annealing to relieve stresses during severe forming or spinning.
Carbon: 0.03 max Chromium: 18.00 - 20.00 Manganese: 2.0 max Nickel: 8.00 - 12.00 Phosphorus: 0.045 max Silicon: 1.0 max Sulphur : 0.03 max Iron: Balance
Density: 0.29 lbs/in3 8.03 g/cm3
Electrical Resistivity: microhm-in (microhm-cm): At 68 ° F (20 ° C): 28.4 (72) At 1200 ° F (659 ° C): 45.8 (116)
Specific Heat: BTU/lbs.-°F (kJ/kg•K): 32 - 212 °F (0 - 100 °C): 0.12 (0.50)
Thermal Conductivity: BTU/hr-ft-°F, (W/m•K) At 212 °F (100 °C)- 9.4 (16.2) At 932 °F (500 °C)- 12.4 (21.4)
Mean Coefficient of Thermal Expansion: in/in/°F (µm/m•K) 32 - 212 °F (0 - 100 °C)- 9.4 x 10-6 (16.9) 32 - 600 °F (0- 315 °C)- 9.6 x 10-6 (17.3) 32 - 1000 °F (0 - 538 °C)-10.2 x 10-6 (18.4) 32 - 1200 °F (0 - 649 °C)-10.4 x 10-6 (18.7) Modulus of Elasticity: ksi (MPa) 28 x 103 (193 x 103) in tension 11 .2 x 103 (78 x 103) in torsion Magnetic Permeability, H = 200 Oersteds: Annealed < 1.02 max Melting Range: 2550 - 2650 °F (1399 - 1454 °C)
Coil - Strip, Foil, Ribbon Wire - Profile, Round, Flat, Square
Ultimate Tensile Strength: 70 KSI (485 MPa) Yield Strength: 25 KSI (170 MPa) Elongation: 40% Hardness: R 88
304L can be cold rolled to various tempers. Contact Ulbrich Technical Service for additional information.
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