Austenitic steel XM-19
2026-08-19 16:46:17 Origin： Remark：0 Click：
XM19 is a stainless, non-magnetizable, austenitic steel.These grades are used in applications where a combination of high corrosion resistance, mechanical strength, and non-magnetic behavior is essential
XM-19 is a highly alloyed austenitic stainless steel as listed in ASTM A276 / A479 as UNS S20190. It is also commonly referred to as Nitronic 50.
The mechanical properties at both elevated and sub-zero temperatures are very good and, unlike many austenitic stainless steels, the alloy does not become magnetic when cold worked or cooled to sub-zero temperatures. In the cold-worked condition, the material possesses a yield strength up to over three times that of Type 316 stainless steel.This is comparable with that of a duplex stainless steel such as Sanmac 2205 (1.4462). Therefore, it provides good levels of corrosion resistance.
APPLICATIONS
Applications include Oil & Gas industry downhole equipment, marine pumps, valves, masts, tie downs, fixtures and fittings, food processing equipment and pulp and paper Industry valves and fittings. Of all these applications, valve stems are perhaps the most common end use for this application. As an austenitic stainless steel, it has better impact strength across a wider range of temperatures than alternative grades.
TYPICAL CHEMICAL ELEMENTS (mass weight - %)
Carbon, C (％): ≤ 0.06
Silicon, Si (％): ≤ 1.00
Manganese, Mn (％): 4.00 ~ 6.00
Phosphorus, P (％): ≤ 0.030
Sulfur, S (％): ≤ 0.015
Chromium, Cr (％): 20.5 ~ 23.5
Nickel, Ni (％): 11.5 ~ 13.5
Molybdenum, Mo (％): 1.50 ~ 3.00
Niobium, Nb (％): 0.10 ~ 0.30
Silicon, Si (％): ≤ 1.00
Manganese, Mn (％): 4.00 ~ 6.00
Phosphorus, P (％): ≤ 0.030
Sulfur, S (％): ≤ 0.015
Chromium, Cr (％): 20.5 ~ 23.5
Nickel, Ni (％): 11.5 ~ 13.5
Molybdenum, Mo (％): 1.50 ~ 3.00
Niobium, Nb (％): 0.10 ~ 0.30
Nitrogen, N (%): 0.20 ~ 0.40
Vanadium, V (%): 0.10 ~ 0.30
MECHANICAL PROPERTIES UNDER FINAL HEAT TREATMENT
Form: bars, Plate, strip
Tensile strength, Rm / MPa: 690
Yield strength, Rp0.2 / MPa: 380
Elongation, δ5 (％): 35.0
Reductionf of area, ф (％): -
Elongation, δ5 (％): 35.0
Reductionf of area, ф (％): -
Hardness (HBW): -
Cold bending property: N
We stock Nitronic 50 (UNS S20910, XM-19) in round bar.
OTHER DISIGNATIONS
AMS 5764 Bar, Forgings, Rings
ASTM A314, ASME SA314
ASTM A479 type XM19
ASTM A276 type XM19
ASTM A240, ASME SA240
ASTM A412, ASME SA412
ASTM A193 type B8R
ASTM A194 type B8
UNS S20910
Our knowledgeable staff and metallurgical engineers will be pleased to assist you further on any technical topic.
JIANGYOU LONGHAI SPECIAL STEEL CO.,LTD
ISO 9001-2015 Certified
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