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AISI 304 DIN 1.4301 - X 5 CrNi 18 10 General characteristics AFNOR Z 6 CN 18 09 Austenitic stainless steel of intermediate corrosion resistance. The high tolerance in carbon presents a risk for the precipitation of chromium carbides in the grain boundaries during heat treatment. These carbides reduce the resistance to intergranular corrosion. In applications presenting the risk of intergranular corrosion, the low carbon grade 304 L is preferably used. In case of complex machining operation
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   AISI 304 DIN 1.4301 - X 5 CrNi 18 10  AFNORZ 6 CN 18 09 Machinability - Quench hardening no Polishing - Magnetic no  Age hardening noMIG,TIG,WIGyes ArcyesResistanceyes Autogenous-Laseryes CSiMnPSCrMoNiOthers < 0.07< 1.00< 2.00< 0.045< 0.015*17.0-19.5-8.0 - 10.5N < 0.11*S < 0.03% for bars, wires, profiles and corresponding semi-products DensityElectrical resistivitySpecific heatThermal conductivity r  [kg·m -3 ]  r  [µ W ·m]C p  [J·kg -1 ·K -1 ]  l  [W·m -1 ·K -1 ]7'9000.7350015 Coefficient of thermal expansionElastic modulus a  [10 -6 ·°C -1 ] between 20°C andE [GPa]100 °C200 °C300 °C400 °C500 °C600 °C700 °C200 at 20°C16.01717181818.518.5 Yield strengthTensileElongationVickers Rp 0.2  [MPa] strength Hardness 20°C100°C200°C300°CRm [MPa] A 5  [%] [HV] Annealed 200157127110500-70045160 - 200 Full hard 965 12754390 TypeTemperatureTimeProtective atmosphereCooling [°C][minutes]  Annealing 1020 -108015 - 60H 2  + N 2  or cracked NH 3 Quench (water, oil) TypeSolutionRemarksPickling 6 - 25 % HNO 3  + 0.5 - 8 % HFOnly suitable in annealed condition, hot Passivation 20 - 50% HNO 3 Hot The indications are basically founded on our actual know-how. This technical data sheet is without commitment and not contracted. This steel can easily be cold rolled, drawn and stamped. Suitable tooling is required because of its high work hardening rate. This alloy becomes slightly magnetic with increased cold working. This stainless steel should not be maintained for a long time between 500°C and 900°C, because of possible precipitation of chromium carbides at grain boundaries. A consecutive annealing for carbide dissolution is necessary, followed by rapid cooling to prevent a new precipitation. Quenching is recommended independently of the size of the pieces. This steel is relatively difficult to machine, modified steels such as PX, 316LS or PM with the addition of chip breaking additives may be preferred.This steel can easily be welded by any conventional joining technique, except the oxyacetylene torch. Annealing and quenching are recommended after welding to prevent the risk of intergranular corrosion. The grade 304 L is preferably used for welded constructions as this low carbon grade will not be sensitized. Thermal treatmentsSurface treatmentsFabrication characteristicsWelding, brazing and solderingGeneral characteristicsChemical compositionPhysical propertiesMechanical properties Sheets, ribbons, wires, profiles, tubes, dimensions and tolerances on request. State Available productsWelding  Austenitic stainless steel of intermediate corrosion resistance. The high tolerance in carbon presents a risk for the precipitation of chromium carbides in the grain boundaries during heat treatment. These carbides reduce the resistance to intergranular corrosion. In applications presenting the risk of intergranular corrosion, the low carbon grade 304 L is preferably used. In case of complex machining operation, due to the limited machinability of the steel 304, consider to use a free machining grade (PX, 316 LS) or a modified 316 L grade (PM) when a high corrosion resistance is required.For applications in chlorine environments or sea water, a molybdenum containing steel of type 316L is to be preferred.For direct and prolonged contact with skin, the 316L type is preferred.
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