Non-magnetic austenitic stainless steel NITRONIC 50®, UNS S20910, XM-19 wg ASTM A182, A276, A479, A412, A312, A314 in accordance with NACE MR 01-75.
| Standard | Steel Grade | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Composition % | |||||||||||
| C: | Mn: | Si: | P: | S: | Cr: | Ni: | Mo: | V: | Nb: | N: | |
| ASTM | NITRONIC 50® | ||||||||||
| <0.06 | 4.0 - 6.0 | <0.75 | <0.040 | <0.030 | 20.5 - 23.5 | 11.5 - 13.5 | 2.0 - 3.0 | 0.1 - 0.3 | 0.1 - 0.3 | 0.2 - 0.4 | |
| ASTM | UNS S20910 | ||||||||||
| <0.06 | 4.0 - 6.0 | <1.00 | <0.045 | <0.030 | 20.5 - 23.5 | 11.5 - 13.5 | 1.5 - 3.0 | 0.1 - 0.3 | 0.1 - 0.3 | 0.2 - 0.4 | |
| ASTM | XM-19 - XM19 | ||||||||||
| <0.06 | 4.0 - 6.0 | <0.75 | <0.040 | <0.030 | 20.5 - 23.5 | 11.5 - 13.5 | 1.5 - 3.0 | 0.1 - 0.3 | 0.1 - 0.3 | 0.2 - 0.4 | |
| SEW 390 | 1.3964 - X2CrNiMnMoNNb21-16-5-3 | ||||||||||
| <0.03 | 4.0 - 6.0 | <1.00 | <0.025 | <0.010 | 20.0 - 21.5 | 15.0 - 17.0 | 3.0 - 3.5 | - | <0.25 | 0.20 - 0.35 | |
| SEW 390 | 1.3974 - X2CrNiMnMoNNb23-17-6-3 | ||||||||||
| <0.03 | 4.5 - 6.5 | <1.0 | <0.025 | <0.010 | 21.0 - 24.5 | 15.5 - 18.0 | 2.8 - 3.4 | - | 0.1 - 0.3 | 0.3 - 0.5 | |
NITRONIC 50, XM-19, UNS S20910 - specifications and application
Nitronic 50 is austenitic non-magnetic stainless steel with the addition of nitrogen, manganese and molybdenum, characterised by high mechanical properties (f.ex. resistance characteristics) and a very good corrosion resistance.
The grade exhibits comparable resistance to corrosion as basic austenitic grades , high yield point, resistance and stability of mechanical properties in low temperature environments, and some non-magnetism in the specific working conditions.
An additional attribute of the grade is the resistance to intergranular corrosion, seawater, salts, brittleness of the materials (pitting), chlorides, sulphur compounds, dithionic, nitric, phosphoric acids and formaldehyde. Resistance to the previously mentioned environment is dependent on the condition of the delivery of the material.
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.
Mechanical properties of UNS S20910, XM-19
- Annealed condition
- Tensile strength, Rm: >380 MPa
- The yield point, Rp0,2: >690 MPa
- Contraction, Z: >55%
- Elongation, A:> 35%
- Hardness, HB: <293
- Hot-rolled
- Tensile strength, Rm: >415 MPa
- The yield point, Rp0,2: >690 MPa
- Contraction, Z: >50%
- Elongation, A:> 30%
- Strain Hardened
- Tensile strength, Rm: >725 MPa
- The yield point, Rp0,2: >825 MPa
- Contraction, Z: >45%
- Elongation, A:> 15%
Mechanical properties of NITRONIC® 50 in lowered temperatures
- Temperature of -195℃
- Tensile strength, Rm: 1550 MPa
- The yield point, Rp0,2: 880 MPa
- Elongation, A: 41%
- Impact resistance, KV: > 75J
- Hardness, HRB: <215
- Temperature of -40℃
- Impact resistance, KV: > 255J
- Temperature of -70℃
- Tensile strength, Rm: 1000 MPa
- The yield point, Rp0,2: 580 MPa
- Elongation, A: 49%
- Temperature of 20℃
- Tensile strength, Rm: 830 MPa
- The yield point, Rp0,2: 390 MPa
- Elongation, A: 45%
- Impact resistance, KV: > 270J
- Hardness, HRB: 95
- Temperature of 200℃
- Tensile strength, Rm: 720 MPa
- The yield point, Rp0,2: 320 MPa
- Elongation, A: 38%
- Temperature of 650℃
- Tensile strength, Rm: 570 MPa
- The yield point, Rp0.2: 290 MPa
- Elongation, A: 36%
Physical properties of NITRONIC 50®
- Thermal capacity, cp: 500 J * kg-1 * K-1
- Thermal conductivity, λ: 15 W * m-1 * K-1
- Modulus of elasticity, E: 200 GPa
- Linear expansion coefficient, α: 17,2 * 10-6 K-1
In the above mentioned grades the company provides:
Other indications and equivalents grade:
B8RA, 8R, CG6MMN, 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.