309S Stainless Steel Bar

Product Overview

309S stainless steel bar is a high-temperature resistant austenitic stainless steel with excellent resistance to oxidation and corrosion in elevated temperature environments. 🔥 It is designed to perform well in extreme heat conditions, making it ideal for use in furnace components, heat exchangers, and other high-temperature applications. 309S combines high strength, good weldability, and excellent oxidation resistance, making it suitable for a wide range of industrial applications.

Available Sizes

• 📏 Type: Round bar, Square bar, Flat bar, Hexagonal bar
• 📐 Diameter (Round): 6mm – 250mm
• 📏 Length: 1000mm – 6000mm or customized
• 🎯 Tolerances: h9, h10, h11 (available upon request)
• 📚 Standards: ASTM A276, ASTM A479, EN 10088-3, JIS G4303

Chemical Composition

Element	Content (%)
C	≤ 0.08
Si	≤ 1.00
Mn	≤ 2.00
P	≤ 0.045
S	≤ 0.030
Cr	23.0 – 25.0
Ni	12.0 – 15.0

Mechanical Properties

Property	Value (Annealed)
Tensile Strength	≥ 520 MPa
Yield Strength	≥ 205 MPa
Elongation (%)	≥ 40%
Hardness (HB)	≤ 201

Features & Advantages

• ✅ Excellent high-temperature oxidation resistance
• ⚙️ Ideal for use in furnace and heat exchanger components
• 🔥 Excellent corrosion resistance in elevated temperature environments
• 🛠️ Good weldability and formability
• 🌟 Suitable for high-stress industrial applications

Applications

• 🔥 Furnace components and heat exchangers
• 🏗️ High-temperature structural components
• ⚙️ Industrial equipment subjected to high temperatures
• 🔧 Automotive components
• 📦 Aerospace parts

Surface Finish

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

Processing Services

• ✂️ Length cutting to custom specifications
• 🧽 Surface grinding and polishing
• 🔩 CNC machining and threading
• 📏 Precision tolerance control
• 📦 Custom packaging for bulk shipments