303 stainless steel grinding rod is easier to cut than 304 by adding Cu element and a small amount of sulfur and phosphorus. Other properties are similar to 304, and the anti-corrosion performance is not as good as 304.

303 stainless steel grinding rod elongation δ5 (%) ≥ 40 (under solution treatment conditions)

Hardness solution treatment HB≤187HRB≤90HV≤200

Area shrinkage under the solid solution treatment condition: ψ (%)≥50,

Standard: GB/T 1220-1992

Features and scope of application:

Improve machinability and ablation resistance. Suitable for automatic lathes. Rivets, screws.

chemical composition:

Carbon C: ≤0.15

Silicon Si: ≤1.00

Manganese Mn: ≤3.00

Sulfur S: ≥0.15

Phosphorus P: ≤0.020

Chromium Cr: 17.00～19.00

Nickel Ni: 8.00～10.00

Molybdenum Mo: can be added ≤0.60

Copper Cu: 1.50～3.50

Note: Se≤0.3

Mechanical properties:

Tensile strength: ≥520

Conditional yield strength: ≥205

Elongation: ≥40

Area shrinkage: ≥50

Hardness: ≤187HB; ≤90HRB; ≤300HV

Heat treatment specification and metallographic structure:

Heat treatment specifications: solid solution 1010 ~ 1150 ℃ rapid cooling.

Metallographic structure: The structure is characterized by austenitic type.

Application range: petroleum, electronics, chemical industry, medicine, textile, food, machinery, construction, nuclear power, aerospace, and other industries!

Application fields include: petroleum and petrochemical equipment, such as reactors in petrochemical equipment, storage and transportation equipment of sulfuric acid, such as heat exchangers, etc., power plant flue gas desulfurization devices, the main use parts are: tower body of absorption tower, smoke Roads, door panels, internal parts, spray systems, etc., scrubbers and fans in organic acid treatment systems, seawater treatment devices, seawater heat exchangers, paper industry equipment, sulfuric acid, nitric acid equipment, acid production, pharmaceutical industry and other chemicals Equipment, pressure vessels, food equipment, pharmaceutical plants: centrifuges, reactors, etc., plant food: soy sauce tanks, cooking wine, salt tanks, equipment and dressings, 904L is a matching steel grade for the strong corrosive medium of dilute sulfuric acid.