I. Basic Material

Item	Technical Parameters
Material Grade	XM-19 (Nitronic 50)
UNS Grade	S20910
Chinese National Standard Grade	00Cr22Ni13Mo2N
DIN Grade	1.3964

II. Chemical Composition (Mass Fraction wt%)

C	Si	Mn	P	S	Cr	Ni	Mo	N	Nb	V
≤0.06	≤1.00	4.00～6.00	≤0.045	≤0.030	20.50～23.50	11.50～13.50	1.50～3.00	0.20～0.40	0.10～0.30	0.10～0.30

III. Mechanical Properties

Item	Mechanical Properties
Tensile Strength Rm	≥827 MPa (100ksi)
0.2% Proof Strength Rp0.2	≥552 MPa (55ksi)
Elongation after Fracture A	≥35%
Brinell Hardness	≤293 HB

IV. Dimensional Accuracy Specifications

Item	Technical Requirements
Common Diameter Range	φ3.0mm～φ300mm
Diameter Tolerance	Standard: h8, h9; High Precision: h7, f7, g6, h6
Roundness	≤1/2 of diameter tolerance
Straightness	≤0.10mm/1000mm
Standard Length	φ40mm and below: 3 meters; Above φ40mm: 6 meters available (custom fixed lengths supported)
End Face Requirements	Flat ends, chamfered and deburred

V. Machining Process & Surface Roughness

Process Type	Complete Process Flow	Surface Roughness
Process 1	Hot-rolled base material → Precision drawing → Centerless precision grinding	Ra 0.4～0.8μm
Process 2	Hot-rolled base material → Peeling and straightening → Centerless precision grinding	Ra 0.4～0.8μm
Process 3	Hot-rolled base material → Peeling and straightening → Centerless precision grinding → Polishing	Ra ≤0.2μm

VI. Physical Properties and Surface Quality

Item	Parameter Description
Material Density	7.80 g/cm³
Magnetism	Non-magnetic (remains non-magnetic after annealing and cold working)
Appearance Quality	Free of cracks, peeling, pinholes, oxide scale, rust and impact bruises

VII. Application Scenarios
Seawater equipment, marine engineering, oil & gas desulfurization, high-chloride corrosive chemical environments, high-strength corrosion-resistant valve stems, high-pressure piston rods, special corrosion-resistant precision shaft parts, low-temperature equipment (maintains high toughness at -196℃).