I. Basic Material

Item	Technical Parameter
Material Grade	316L
Chinese National Standard Grade	022Cr17Ni12Mo2
UNS Grade	S31603
DIN Grade	1.4404

II. Chemical Composition (mass fraction wt%)

C	Si	Mn	P	S	Cr	Ni	Mo
≤0.030	≤1.00	≤2.00	≤0.045	≤0.030	16.00～18.50	10.00～14.00	2.00～3.00

III. Mechanical Properties

Item	Mechanical Property
Tensile Strength Rm	≥480 MPa
Yield Strength Rp0.2	≥170 MPa
Elongation after Fracture A	≥40%
Brinell Hardness	≤187 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 diameter above φ40mm (custom fixed lengths available)
End Face Requirements	Flat ends with chamfering and deburring

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 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	7.98 g/cm³
Magnetism	Non-magnetic / Weakly magnetic
Surface Appearance Quality	Free of cracks, peeling, pinholes, oxide scale, rust and impact bruises

VII. Application Scenarios
Marine environments, medical equipment, food processing machinery, chemical equipment, hydraulic piston rods, precision shafts, corrosion-resistant precision structural components