As a reliable manufacturer and supplier of Stainless Steel 303 distributor, Lakshya International carries an extensive selection of round bar stock, hex bar stock, square bar stock, flanges, fittings, machined parts, and components made from UNS S30300 / Werkstoff 1.4305 in various diameters, lengths, and finishes. With more than two decades’ experience in stainless steel products supply and mill test certificate (EN 10204 3.1/3.2), our SS 303 products is well-suited to serve as a raw material for the manufacturing of OEM parts, fasteners, and screw-machine parts and offers same-day quotes for standard dimensions and traceability to heat number on all deliveries. This stainless steel has excellent machinability and adequate strength combined with acceptable levels of corrosion resistance suitable for non-demanding applications. Applications include screws, bolts, shafts, gears, valve parts, fittings, and other components requiring machining operations.
Chemical Properties of Stainless Steel 303 Products
|
Element |
Min (%) |
Max (%) |
|
Carbon (C) |
— |
0.15 |
|
Manganese (Mn) |
— |
2.00 |
|
Phosphorus (P) |
— |
0.20 |
|
Sulphur (S) — defining element |
0.15 |
0.35 |
|
Silicon (Si) |
— |
1.00 |
|
Chromium (Cr) |
17.00 |
19.00 |
|
Nickel (Ni) |
8.00 |
10.00 |
|
Molybdenum (Mo) — optional |
— |
0.60 |
SS 304 Mechanical Properties
|
Parameter |
Metric Value |
Imperial Equivalent |
|
Tensile Strength, Min |
515 MPa |
75 ksi |
|
Yield Strength 0.2%, Min |
205 MPa |
30 ksi |
|
Elongation in 50 mm, Min |
40% |
— |
|
Reduction of Area, Min |
50% |
— |
|
Hardness, Brinell (BHN), Max |
262 |
— |
|
Hardness, Rockwell B, Max |
100 |
— |
Stainless Steel 303 Physical Properties
|
Parameter |
Value (SS 303) |
|
Density |
7900 kg/m³ (0.286 lb/in³) |
|
Elastic Modulus |
193 GPa |
|
Coefficient of Thermal Expansion (0–100°C) |
17.2 µm/m/°C |
|
Thermal Conductivity (at 100°C) |
16.2 W/m·K |
|
Specific Heat Capacity (0–100°C) |
500 J/kg·K |
|
Electrical Resistivity (at 20°C) |
720 nΩ·m |
|
Magnetic Permeability |
1.02 (non-magnetic, austenitic) |
UNS S30300 Grade Equivalent Grades
|
Standard System |
Equivalent Grade / Designation |
|
AISI / SAE (American) |
303 |
|
UNS (Unified Numbering System) |
S30300 |
|
BS (British Standard) |
303S31 |
|
DIN EN (German / European Number) |
1.4305 |
|
EN Name (European Chemical Name) |
X8CrNiS18-9 |
|
SS (Swedish Standard) |
2346 |
|
JIS (Japanese Industrial Standard) |
SUS 303 |
Stainless Steel 303 Product Range — Forms We Manufacture
Lakshya International is the manufacturer and stockist of the full range of Stainless Steel 303 products – round bars and rods for shaft and fastener machining, hex bars for bolt and nut production, square bars for fabricated parts, flanges, fittings and components, channels, H-beams and I-beams for structural and connection applications. Click on the product below to view dimensions, finishes and availability.
Stainless Steel 303 Flanges
Stainless Steel 303 Rod/Bars
Stainless steel 303 Square Bar
Stainless steel 303 channels
Stainless steel 303 H Beam
Stainless steel 303 I Beam
Stainless Steel 303 Fittings
Stainless Steel 303 Hex Bars
Stainless Steel 303 Components
Application Usage of 303 Products
- Fasteners – Nuts & Bolts
- Bushings & Shaftings
- Aircraft & Engine Components
- Valve Components
- Automotive Gears & Equipments
- Electrical Components & Parts
- General Engineering Applications
Frequently Asked Questions:
What is 303 stainless steel material?
303 stainless steel is a free-machining austenitic stainless steel with added sulfur for easier cutting and machining.
What is 303 stainless used for?
It is used for screws, nuts, bolts, shafts, gears, fittings, and CNC-machined parts.
Which is better 303 or 304 stainless steel?
303 is better for machining, while 304 is better for corrosion resistance and welding.
What is the price of SS 303 per kg?
SS 303 price per kg depends on size, finish, quantity, and market rates.
Can Stainless Steel 303 be welded?
Yes, but it is not preferred for welding because sulfur can reduce weld quality.
Is SS 303 magnetic?
SS 303 is non-magnetic in the annealed condition due to its austenitic microstructure. After heavy cold working (drawing, machining, severe forming), small amounts of strain-induced martensite may form, giving the material a weak magnetic response — this is normal and does not indicate quality defects or mixed grades.
