UNS S20910 / XM-19 / NITRONIC® 50

• Applications

  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.

• Heat Treatment

  Annealed, for most applications, the 1066°C condition should be selected, as it provides a higher level of mechanical properties along with excellent corrosion resistance. A high strength version can also be supplied with min. yield at 585MPa.

   

• 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

  Product Standards: ASTM A276, ASTM A479
  Approvals: NACE MR0175

• Mechanical Properties

  	Yield strength Rp0.2, MPa	Tensile strength Rm, MPa	Elongation [%]	Hardness [HB]	Impact, Charpy-V, 20ºC [J]
  BAR	≥ 345	≥ 655	≥ 35	≤ 293	230
  Typical	420	730	50	201
  High strength version*	≥ 586	≥ 896	≥ 20	≤ 330

  * Normal stock version

Stocked products and dimensions

• Round Bar Stock

  DIA

  25,4 mm

  38,1 mm

  5,8 mm

  63,5 mm

  76,2 mm

  90 mm

  101,6 mm

  140 mm

  145 mm

  160 mm