1.3964, X2CrNiMnMoNNb21-16-5-3, S20910, XM-19

December 29, 2022 | Tags: X2CrNiMnMoNNb21-16-5-3, S20910, 1.3964, XM-19,

1.3964, X2CrNiMnMoNNb21-16-5-3 is a Austenitic chromium-nickel stainless steel stabilised with niobium for use in non-magnetic applications.displays non magnetic properties due to its high alloy content. This high alloy content also results in high tensile and yield strengths coupled with very good resistance against corrosion, especially in seawater and coastal environments.

Applications & Details
Chemical Composition
Mechanical Properties
Physical Properties
Stocks
Heat Treatment
Thermal Properties
Welding
Machining
Similar or equivalents steel grade

Chemical Composition

Grade	Chemical composition WT %
Grade	C	Si	Mn	P	S	Cr	Ni	Mo	Nb	N	V
1.3964, X2CrNiMnMoNNb21-16-5-3	0.03	1.00	4.00-6.00	0.025	0.010	20.00-21.50	15.00-17.00	3.00-3.50	0.25	0.20-0.35
UNS S20910	0.06	1.00	4.00-6.00	0.040	0.030	20.50-23.50	11.50-13.50	1.50-3.00	0.10-0.30	0.20-0.40
SAE J 405 XM-19	0.06	0.75	4.00-6.00	0.040	0.030	20.50-23.50	11.50-13.50	1.50-3.00	0.10-0.30	0.20-0.40
A276 XM-19	0.06	1.00	4.00-6.00	0.045	0.030	20.50-23.50	11.50-13.50	1.50-3.00	0.10-0.30	0.20-0.40	0.10-0.30

Mechanical Properties

1.3964, X2CrNiMnMoNNb21-16-5-3 Mechanical properties

Tensile strength R_m MPa: 700-950
Yield Strength R_p MPa: Min 365
A %: min. 35%
Impact energy (J) 25 °C: min 85 J

1.3964, X2CrNiMnMoNNb21-16-5-3 Mechanical properties acc. to SEW 395

Thk.100mm

Tensile strength R_m MPa: 570-800
Yield Strength R_p MPa: Min 315
A %: Min 20
Impact energy (J) 25 °C: min 65 J

Physical Properties

Temperature(℃)	Elasticity(GPa)	MTEC	Thermal conductivity(W/m·℃)	Specific heat(J/kg·℃)	Electrical(Ωmm²/m)	Density(kg/dm³)	Poisson's,v
400.0	-	17.80	-	-	-	-	-
300.0	-	17.50	-	-	-	-	-
200.0	-	17.00	-	-	-	-	-
100.0	-	15.70	-	-	-	-	-
25.0
20.0	-	-	14.00	-	-	-	-
20.0	-	-	-	-	0.80	-	-
20.0	-	-	-	-	-	7.90	-
20.0	195.00	-	-	-	-	-	-

Heat Treatment

Optimal physical and fabrication properties are realised after solution annealing in the temperature range 1020 °C – 1050 °C followed by rapid cooling in air or water. In the solution annealed condition

Thermal Properties

Welding Properties

As a result of the low carbon content of 1.3964, welding will not result in the formation of chromium carbides. Should a filler material be required, then the grades 1.3954 and 1.3984 can be used.Should heat treatment after welding be unavoidable, due to extensive cold deformation or due to high wall thickness, then the aforementioned heat treatment may be undertaken.

Machining Properties

As a result of its high alloying addition, 1.3964 is difficult to machine. The following machining parameters can be used as a guideline when machining 1.3964 using coated hard metal cutting tools