Product Overview
Hot rolled stainless steel bars are produced by rolling billets above their recrystallization temperature. This high-temperature process relieves internal stresses and forms a stable, scaled surface optimized for heavy-duty CNC machining, structural fabrication, and industrial component manufacturing.
Available Profiles: Round, Flat, Square, Hexagon
Primary Grades: 304/304L, 316/316L, 321, 310S, 2205 (Duplex)
Standard Stock Lengths: 3m, 5.8m, 6m, or custom cut lengths
Technical Specifications
Procurement engineers and quality teams can verify mechanical parameters and manufacturing tolerances below:
Executive Standards: ASTM A276, ASTM A484, EN 10088-3, JIS G4303
Round Bar Diameter: 10 mm to 300 mm
Flat Bar Dimensions: Thickness 5 mm to 100 mm, Width 20 mm to 400 mm
Surface Condition: Hot rolled, annealed, black surface, or acid pickled (No. 1 finish)
Straightness Tolerance: Less than or equal to 1.5 mm/m (tighter custom tolerances available)
Product Advantages
Homogeneous Metallurgical Structure: High-temperature rolling eliminates cast porosity, ensuring uniform hardness across the entire cross-section for stable downstream machining.
Corrosion Resistance: Standard austenitic grades contain minimum 18% Chromium and 8% Nickel to prevent oxidation in chemical and marine service environments.
Welding Compatibility: Low carbon variants (304L / 316L, carbon less than or equal to 0.03%) suppress carbide precipitation during welding.
Applications
Hot rolled stainless steel bars serve as foundational raw material for critical industrial applications:
Oil & Gas:
Valve stems, pump shafts, and downhole tool couplings.
Marine Engineering:
Propeller shafts, structural fasteners, and seawater system components.
Heavy Machinery:
Hydraulic cylinder rods, structural pins, and drive components.
Fastener Manufacturing:
Heavy-duty bolts, studs, and anchor rods.
Customization & Processing
Our production line supports tailored material preparation to streamline your workshop operations:
Saw & Plasma Cutting: Cut-to-length services with precise end-squareness to reduce scrap waste.
Centerless Grinding & Peeling: Surface processing available to achieve tight diameter tolerances (such as h9 or h11).
Heat Treatment: Solution annealing, quenching, and tempering to meet specific mechanical strength requirements.
Quality Control & Inspection
Every production batch undergoes strict testing to verify compliance before dispatch:
Direct-reading spectrometer testing verifies exact chemical composition against mill sheet requirements.
Tensile strength, yield strength, elongation, and Brinell/Rockwell hardness verification.
Ultrasonic testing (UT) performed per ASTM A388 to detect internal voids, cracks, or inclusions.
Each bar is heat-numbered and supplied with an EN 10204 3.1 Mill Test Certificate (MTC).
Packaging & Shipping
Export Packaging: Bundled with heavy-duty steel strapping, wrapped in moisture-resistant woven fabric, or packed in secure wooden crates.
Corrosion Protection: Anti-rust oil coating applied to bare metal surfaces prior to wrapping.
Logistics: FOB or CIF shipment from major ports (Shanghai, Ningbo, Tianjin) with containerized or break-bulk options.
FAQ
Q: What is your Minimum Order Quantity (MOQ)?
A: Standard stock sizes require a minimum of 1 metric ton per grade. Non-standard dimensions or special alloy grades are evaluated based on rolling mill schedules.
Q: Do you provide Mill Test Certificates?
A: Yes. An EN 10204 3.1 MTC is included with every delivery, listing actual chemical analysis and mechanical test data.
Q: What are the standard delivery lead times?
A: Ex-stock items dispatch within 7 to 10 days. Mill production orders typically require 25 to 35 days.
Request a Quote
To receive a formal quotation, please specify the following parameters:
• Steel Grade (e.g., 316L, 2205)
• Profile and Dimensions (Diameter, Thickness x Width, Length)
• Total Quantity (Metric Tons or Pieces)
• Surface Condition and Standard Requirements
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