XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee


XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless steel Acc. to ASTM A182, A276, A479, A412, A312, A314 Spec

XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee - Introduction and Application

XM-19, NITRONIC ® 50, UNS S20910  is non-magnetic manganese alloyed austenitic stainless steel with improved corrosion resistance compared to higher than stainless steel grades 316, 316/316L, 317, and 317/317L . XM-19 manganese and molybdenum, characterised by high mechanical properties, due to increased chromium content plus about twice the yield strength of the same at room temperature. Unlike many austenitic alloys, XM-19 does not become magnetic when cold formed. XM-19 Stainless has very good mechanical properties at both elevated and sub-zero temperatures.

Steel is used for the production of chains, bolts, nuts, pumps, parts for installation of heat exchangers, springs, valve parts, fittings, flanges, valves, fittings in the petrochemical industry, chemical, nitric, nuclear, offshore, maritime industries and shipbuilding, cryogenic industry, and food industries. The high strength, corrosion resistance, and low magnetic permeability of this alloy allows it to be used as a material for medical implants.AMS 5764, ASTM A240, ASTM A276, ASTM A312, ASTM A314, ASTM A403, ASTM A479, ASTM F1314, NACE MR0175/ISO 15156-3, NACE MR0103


XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee - Chemical composition WT %

GradeChemical Composition WT %
CMnSiPSCrNiMoVNbN
UNS S20910Max 0.064.0 - 6.0Max 1.00Max 0.045Max 0.03020.5 - 23.511.5 - 13.51.5 - 3.00.1 - 0.30.1 - 0.30.2 - 0.4
XM-19, XM19Max 0.064.0 - 6.0Max 0.75Max 0.040Max 0.03020.5 - 23.511.5 - 13.51.5 - 3.00.1 - 0.30.1 - 0.30.2 - 0.4
1.3964, X2CrNiMnMoNNb21-16-5-3Max 0.034.0 - 6.0Max 1.00Max 0.025Max 0.01020.0 - 21.515.0 - 17.03.0 - 3.5
Max 0.250.20 - 0.35
1.3974, X2CrNiMnMoNNb23-17-6-3Max 0.034.5 - 6.5Max 1.0Max 0.025Max 0.01021.0 - 24.515.5 - 18.02.8 - 3.4
0.1 - 0.30.3 - 0.5

Mechanical Property of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee


  • Annealed delivery
    • Tensile strength, Rm:  Min 380 MPa
    • Yield point, Rp0,2:  Min 690 MPa
    • Contraction, Z:  Min 55%
    • Elongation, A: Min 35%
    • Hardness, HB:  Max 293
  • Hot-rolled
    • Tensile strength, Rm: Min 415 MPa
    • Yield point, Rp0,2: Min 690 MPa
    • Contraction, Z: Min 50%
    • Elongation, A: Min 30%
  • Strain Hardened
    • Tensile strength, Rm: Min 725 MPa
    • Yield point, Rp0,2: Min 825 MPa
    • Contraction, Z: Min 45%
    • Elongation, A: Min 15%

Physical Property of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee

PropertiesMetricImperial
Density7.88 g/cm30.285 lb/in3

Heat Treatment of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee

Final annealing process performed for several of the applications, is done at 1065°C (1950°F), which is followed by water quenching. In case this material is used in a strongly corrosive environment, annealing should be done at 1121°C (2050°F). This alloy cannot be hardened by heat treatment.




Welding of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee

Welding of stainless steel grade XM-19 can be performed using traditional joining processes. Recommended filler metal should be XM-19.

Caution should be taken while using autogenous, high power density joining processes such as EB or laser welding, due to low FN potential and severe outgassing possibility.



Machining of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee

Stainless steel grade XM-19 has machinability characteristics that are similar to other austenitic stainless steels; however it requires slower speeds, more power, and higher rigidity due to its high work hardening rate. It is recommended that coated carbide tooling be used.


Equivalent grades of XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee

XM-19, XM19, UNS J93790, 22Cr-13Ni-5Mn, GX4CrNiMnN22-12-5, X2CrNiMnMoNNb21-16-5-3, X 2 CrNiMnMoNNb 21-16-5, X 2 CrNiMnMoNNb 23-17-6-3, 1. 1.3964, 1.3974, NACE MR0175, NACE MR 01-75, nitronic 50HS, XM-19HS, NTR50, Nitronic 50.

XM-19, UNS S20910, X2CrNiMnMoNNb21-16-5-3 Non-magnetic austenitic stainless stee Austenitic stainless steel stock list

Grade Shape Dimensionmm Qty.kg
XM-19 Φ140 5306
XM-19 Φ150 4708
XM-19 Φ160 3986
XM-19 Φ170 3911
XM-19 Φ180 3123
XM-19 Φ16 4567
XM-19 Φ25 7688
XM-19 Φ32 1234
XM-19 Φ35 1234
XM-19 Φ38 3522
XM-19 Φ42 3455
XM-19 Φ45 2455
Φ50 6552