I. Basic Material

Item	Technical Parameters
Material Grade	2205
Chinese National Standard Grade	022Cr22Ni5Mo3N
UNS Grade	S32205/S31803
DIN Grade	1.4462

II. Chemical Composition (Mass Fraction wt%)

C	Si	Mn	P	S	Cr	Ni	Mo	N
≤0.030	≤1.00	≤2.00	≤0.030	≤0.020	21.00～23.00	4.50～6.50	2.50～3.50	0.14～0.20

III. Mechanical Properties

Item	Mechanical Properties
Tensile Strength Rm	≥620 MPa
0.2% Proof Strength Rp0.2	≥450 MPa
Elongation after Fracture A	≥25%
Brinell Hardness	≤293 HB

IV. Dimensional Accuracy Specifications

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

V. Processing Technology & 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 & straightening → Centerless precision grinding	Ra 0.4～0.8μm
Process 3	Hot-rolled base material → Peeling & straightening → Centerless precision grinding → Polishing	Ra ≤0.2μm

VI. Physical Properties & Surface Quality

Item	Parameter Description
Material Density	7.80 g/cm³
Magnetism	Magnetic (duplex microstructure)
Surface Appearance Quality	Free of cracks, peeling, pinholes, scale, rust and collision dents

VII. Application Scenarios
Seawater treatment equipment, chemical processing equipment, oil & gas exploitation, desulfurization equipment, high-corrosion-resistant high-strength shafts, valve stems, piston rods, flanges, pressure vessel components.