I. Base Material

Item	Mechanical Properties
Material Grade	430F
GB Standard Grade	Y10Cr17
UNS Grade	S43020
DIN Grade	1.4104

II. Chemical Composition (Mass Fraction wt%)

C	Si	Mn	P	S	Cr
≤0.12	≤1.00	≤1.00	≤0.060	≥0.15	16.00～18.00

III. Mechanical Properties

Item	Required Index
Tensile Strength Rm	≥450 MPa
0.2% Proof Strength Rp0.2	≥205 MPa
Elongation after Fracture A	≥22%
Brinell Hardness	≤183 HB

IV. Dimensional Accuracy Specifications

Item	Technical Requirements
Common Diameter Range	φ3.0mm ～ φ300mm
Diameter Tolerance	Conventional: 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	7.70 g/cm³
Magnetism	Magnetic
Surface Appearance Quality	Free of cracks, peeling, pinholes, scale, rust and collision damages

VII. Application Scenarios
Automatic lathe parts, CNC precision components, free-cutting structural parts, shafts, pin shafts, instrument parts, food machinery, general wear-resistant and corrosion-resistant components.