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Nitronic - 50

The 200 and 300 series NITRONIC alloys contain between 16% and 30% chromium and 2% to 20% nickel for improved surface quality, formability, corrosion and wear resistance. Heat can not harden austenitic alloys. These stainless steels are the most widely used due to their superior formability and corrosion resistance. All austenitic steels are nonmagnetic when annealed. Depending on their composition, some austenitics are magnetic when cold worked.

In comparison to 316L and 317L, NITRONIC 50 has better corrosion resistance and twice the yield strength at room temperature.

NITRONIC 50 is not magnetic when cold formed. In both high and low temperatures, NITRONIC 50 Stainless has good mechanical properties.


  • ASTM A 479 , A 276 , A 182 STD

Chemical Composition :

Weight % C Si Mn S P Cr Ni Mo Nb V N
Min. 4,00 20,50 11,50 1,50 0,10 0,10 0,20
Max. 0,06 1,00 6,00 0,030 0,040 23,50 13,50 3,00 0,30 0,30 0,40

Mechanical Properties :

Yield strength Rp0.2,MPa Elongation[%] Hardness[HB]
BAR ≥ 345 ≥ 655 ≥ 35 ≤ 293 230
version* ≥ 586 ≥ 896 ≥ 20 ≤ 330


The combination of corrosion resistance and mechanical strength is utilized in marine hardware, pump shafting, petrochemical, pulp & paper, food processing and petroleum industries. Can also be used in “down hole” applications due to sulfide stress cracking resistance.

Field service experience have shown that NITRONIC 50 stainless has excellent resistance to sulfide stress cracking in air conditions. NITRONIC 50 in both the annealed and high-strength (hot rolled) conditions has been included in NACE Standard MR01-75/ ISO 15156-3 “Sulfide Stress Cracking Resistant Metallic Material for Oil Field Equipment,” at hardness levels up to HRc 35 maximum.

Work Process

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