In this article, we will introduce to you all the necessary knowledge about 303 stainless steel.
I. OVERVIEW OF Stainless Steel 303
WHAT IS Stainless Steel 303?
Stainless steel 303 also known as 303 stainless steel is a type of steel widely used in the manufacturing industry because it has 78% better machinability than other stainless steel products of the same type.
WHAT IS 303 STEEL GRADE?
Steel grade 303 is the name according to the American AISI standard
SUS 303 là gì? Mác thép SUS 303 là tên gọi theo tiêu chuẩn JIS của Nhật Bản
See more articles: What is 316L stainless steel? Where to buy reputable 316L stainless steel?
II. CHARACTERISTICS OF SUS 303 Stainless Steel
CHEMICAL COMPOSITION
| Steel grade | Chemical composition: | ||||||||
| C | Mn | P | S | Si | Cr | Ni | Mo | Zr | |
| SUS 303 | ≤0.15 | 2.00 | 0.20 | ≥0.15 | 1.00 | 17.00 – 19.00 | 8.00 – 10.00 | 0.60 | 0.60 |
PHYSICAL AND MECHANICAL PROPERTIES
| Steel grade | Tensile strength (MPa) | Yield limit 0.2% Proof (MPa) | Elasticity coefficient (% in 50mm) | Stiffness | |
| Rockwell B (HR B) | Brinell (HB) | ||||
| SUS303 | 310 | 586 | – | ≤262 | |
PHYSICAL PROPERTIES
| Steel grade | Tính chất vật lý | ||||||||
| Density (kg/m3) | Elasticity (GPa) | Thermal expansion coefficient (µm/m/°C) | Thermal conductivity (W/m.K) | Specific heat 0-100°C (J/kg.K) | Resistivity (nΩ.m) | ||||
| 0-100°C | 0-315°C | 0-538°C | At 100°C | At 500°C | |||||
| SUS 303 | 8027 | 193 | 17.3 | 17.8 | 18.4 | 16.3 | 21.5 | 500 | 720 |
TECHNICAL MARK COMPARISON OF Stainless Steel 303
| Steel grade | UNS number | Old British Standard | European standards | Sweden | Japan | ||
| BS | En | Số | Tên | SS | JIS | ||
| SUS303 | S30300 | 303S31 | 58M | 1.4305 | X8CrNiS18-9 | 2346 | SUS 303 |
REPLACEABLE GRADES FOR 303 STEEL
| Steel grade | Why can you choose this grade to replace 303 sus steel? |
| Inox 304 | Better durability and corrosion resistance, cheaper processing costs |
| Inox 316L | Better durability and corrosion resistance in chloride environments, lower machinability is acceptable. |
| Inox 416 | Machinability is even higher than required for 303 stainless steel, has lower corrosion resistance, and can be hardened by heat treatment while still maintaining high machinability. |
APPLICATIONS OF SUS303 Stainless Steel
SUS 303 stainless steel is used to produce products such as: bushings, bolts, aircraft parts, transmission shafts, electrical switching components,...