904L Stainless Steel

904L stainless steel stockholders and suppliers, delivering to the whole of the UK. 904L is an austenitic stainless steel offering moderate to high corrosion resistance available in bar and plate with delivery to the whole of the UK. West Yorkshire Steel are suppliers and stockholders of 904L stainless steel bar and plate.  Its high alloy composition offers good resistance to pitting and corrosion in a wide range of environments. The low carbon content of 904L improves its welding characteristics. The chromium, molybdenum and nickel contents of 904L provide a better chloride pitting corrosion resistance than that of 316 in many environments.

We welcome export enquiries for stainless steel. Contact our sales office and consult our shipping policy for further details.

Related Specifications

1.4539 BS EN 10088 1 3 EN 10272 NACE MR0175
UNS ASTM A182 UNS ASME SB649 N08904 AISI 904

Popular grades we supply

17/4PH | FV520B | S31254 | 310 | 316 | 321 | 440B | 440C | 420 | 410 | 416 | 431 | S31803 | S32760

Form of Supply

West Yorkshire Steel are suppliers and stockholders of round bar, sheet and plate in 904L stainless steel. Diameters can be supplied bandsaw cut to your requirements. Ground 904L stainless steel bar can be produced, providing a high quality precision ground stainless bar to your tight tolerances. Also available in plate which can be supplied as 904L plasma cut pieces.

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  • Sheet
  • Plate
  • Diameter

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904L is widely used in the chemical, pharmaceutical, oil and gas industries. Typical applications include tanks, valves, heat exchangers, flanges and manifolds. The addition of copper to the composition of 904L aids its suitability for components such as tanks and other products used in handling sulphuric and phosphoric acid.

Carbon 0.02% max Chromium 19.00-23.00%
Manganese 2.00% max Nickel 23.00-28.00%
Silicon 1.00% max Molybdenum 4.00-5.00%
Phosphorous 0.045% max Copper 1.00-2.00%
Sulphur 0.035% max

Where a level of resistance to pitting corrosion better than 316 is required 904L may be suitable. With its high nickel content at 25% it offers improved resistance to chloride stress corrosion cracking compared to other austenitic grades such as 304.

904L can be welded using common fusion and resistance methods. A more highly alloyed filler is recommended to give the optimum corrosion properties in the weld. We recommend you contact your welding consumables supplier who should provide you full assistance and information on welding 904L stainless steel.

The oxidation resistance of a stainless steel grade is traditionally termed as the scaling temperature. This is the temperature at which the oxidation rate of the steel becomes unacceptably high. The safe scaling temperature for continuous service of 904L is 1000°C. In an oxidising and reducing sulphurous atmosphere the scaling temperature is lowered.

Temp °C Density
Mean Coefficient
of Thermal Expansion
of Elasticity
Specific Heat
20 8.0 16.1×10-6 19500 0.85 500

Stainless steel 904L grade is available with BS EN 10204 3.1 mill certificate, please request when placing any orders.

904L stainless steel is supplied in accordance with our ISO 9001:2015 registration.