304L Stainless Steel Round Bar | Low-Carbon Excellence for Critical Fabrication

✓ Weld-Perfect Chemistry: Carbon-restricted design prevents carbide precipitation, achieving AWS D1.6 Class W weld integrity.

✓ Corrosion Defense: Survives 1,200+ hours in ASTM G48 salt spray testing – ideal for coastal environments.

✓ Machining Precision: HB 160-200 hardness enables tight-tolerance turning and milling (±0.05mm).

✓ Hygienic Compliance: Ra ≤0.8μm polished finish meets FDA CFR 175.300 and 3-A Sanitary Standards.

304L Stainless Steel Round Bar (UNS S30403)

Engineered for weld-intensive and high-temperature applications, 304L stainless steel round bar offers superior resistance to intergranular corrosion with ultra-low carbon content (≤0.03%). This stabilized austenitic grade retains the versatility of standard 304 while eliminating sensitization risks in welding and stress-relieving operations. Certified to ASTM A276/A479 and ASME SB-213, it is the trusted choice for chemical processing equipment, food-grade machinery, and architectural components requiring long-term durability.

Diameter Range: 3mm–250mm (hot-rolled ±0.5%; cold-drawn ±0.05mm)

Length: 1m–6m standard (cut-to-length precision ±1mm)

Surface Finishes: Hot Rolled, Cold Drawn, Polished (Ra ≤0.8μm), or Ground (Ra ≤0.4μm)

Mechanical Properties: Yield Strength ≥170 MPa | Tensile Strength ≥485 MPa | Elongation ≥45%

Parameter Category	Value/Description
Material Grade	UNS S30403 (per ASTM A276)
Composition (%)	C≤0.03, Cr 18.0-20.0, Ni 8.0-12.0, Mn≤2.0, Si≤1.0, P≤0.045, S≤0.03, N≤0.10
Tensile Strength (MPa)	≥485 (Annealed)
Yield Strength (MPa)	≥170 (Annealed)
Elongation (%)	≥40 (50mm gauge length)
Hardness	Brinell (HB): ≤201; Rockwell (HRB): ≤92 (Annealed)
Density (g/cm³)	8.03
Melting Range	1400-1450℃
Thermal Conductivity (W/m·K)	16.2 (20℃)
Thermal Expansion (10⁻⁶/℃)	17.2 (20-100℃)
Electrical Resistivity (Ω·m)	0.72×10⁻⁶ (20℃)
Elastic Modulus (GPa)	193
Magnetic Properties	Non-magnetic (Annealed)
Corrosion Resistance	Excellent resistance to general corrosion, oxidizing acids, and organic acids; resists intergranular corrosion (due to ultra-low carbon content, no post-weld heat treatment required)
Heat Treatment	Annealing: 1010-1120℃ followed by rapid cooling (water or air quenching)
Surface Finishes	Black (Hot-rolled), Turned, Polished, Pickling & Passivation
Dimension Range	Diameter: 5mm-300mm; Length: 3000mm/6000mm (standard)
Standards	ASTM A276/A479, EN 10088-3, JIS G4303, GB/T 1220
Applications	Welded structures, chemical tanks, food processing equipment, medical devices, cryogenic pipelines, nuclear components

304L Stainless Steel Round Bar Applications

Industry	Critical Components	304 Round Bar Advantage
Food & Beverage	Mixer shafts, valve stems	Withstands CIP cleaning with 3% caustic soda solutions.
Chemical Plants	Pump shafts, reactor agitators	Resists 10% nitric acid at 50°C (122°F).
Automotive	Suspension bolts, turbocharger shafts	Fatigue strength 30% higher than carbon steel equivalents.
Architecture	Balustrades, seismic reinforcement rods	0.5mm/m straightness tolerance for precision installations.

304L Stainless Steel Round Bar Product Packaging

304L Stainless Steel Round Bar are precision-engineered for superior corrosion resistance and mechanical strength, meeting ASTM A276 and ISO 3506 standards. To ensure optimal performance from factory to your facility, we implement rigorous packaging protocols and logistics safeguards.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。