303 Stainless Steel Bar

1. Product Overview

303 stainless steel bar is a specially modified austenitic stainless steel designed for excellent machinability. 🧰 It contains added sulfur to improve chip formation and reduce tool wear during machining. While maintaining good corrosion resistance, it is ideal for automatic machining operations in high-speed production environments. Common uses include fasteners, fittings, gears, and shafts.

2. Available Sizes

• 📏 Type: Round bar, Square bar, Hex bar, Flat bar
• 📐 Diameter (Round): 3mm – 200mm
• 📏 Length: 1000mm – 6000mm (customizable)
• 🎯 Tolerances: h9, h10, h11 (upon request)
• 📚 Standards: ASTM A582, ASTM A276, EN 10088-3

3. Chemical Composition

Element	Content (%)
C	≤ 0.15
Si	≤ 1.00
Mn	≤ 2.00
P	≤ 0.20
S	0.15 – 0.35
Cr	17.0 – 19.0
Ni	8.0 – 10.0

4. Mechanical Properties

Property	Value (Annealed)
Tensile Strength	≥ 500 MPa
Yield Strength	≥ 190 MPa
Elongation (%)	≥ 35%
Hardness (HB)	≤ 230

5. Features & Advantages

• ✅ Excellent machinability for high-speed turning and drilling
• ✅ Lower tool wear, ideal for CNC & automatic lathes
• ✅ Good corrosion resistance in mild environments
• ✅ Non-magnetic in annealed condition
• ⚙️ Suitable for small and precision components

6. Applications

7. Surface Finish

• 🖤 Black
• 🧼 Pickled
• ✨ Bright
• 🔧 Polished (180#, 240#, 320#)
• 🌀 Peeled / Turned / Ground

8. Processing Services

• ✂️ Precision cutting and chamfering
• 🧽 Surface grinding and polishing
• 🔩 CNC machining and shaping
• 📏 Custom size and tolerance machining
• 🎯 Bar turning and threading