I. Basic Material

Item	Technical Parameters
Material Grade	304
Chinese National Standard Grade	06Cr19Ni10
UNS Grade	S30400
DIN Grade	1.4301 (X5CrNi18-10)

II. Chemical Composition (Mass Fraction wt%)

C	Si	Mn	P	S	Cr	Ni
≤0.08	≤1.00	≤2.00	≤0.045	≤0.030	18.00～20.00	8.00～10.50

III. Mechanical Properties

Item	Mechanical Properties
Tensile Strength Rm	≥520 MPa
0.2% Proof Strength Rp0.2	≥205 MPa
Elongation after Fracture A	≥35%
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	φ40mm and below: 3 meters; Above φ40mm: 6 meters available (custom fixed lengths acceptable)
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	7.93 g/cm³
Magnetism	Non-magnetic / weakly magnetic
Surface Appearance Quality	Free of cracks, peeling, pinholes, scale, rust and collision dents

VII. Application Scenarios
Application Scope: Hydraulic and pneumatic piston rods, precision guide shafts, pin shafts, transmission components, anti-corrosion equipment, food machinery, general precision mechanical structural parts