SS Black Round Bars are hot-rolled stainless steel bars characterized by their distinctive black/mill scale finish, indicating that they have not undergone pickling, polishing, or surface treatment post rolling. These solid round bars deliver excellent mechanical strength and corrosion resistance, making them suitable for a wide range of industrial applications including forging, precision machining, and component manufacturing. Available in diameters from 12 mm to 350 mm and lengths of 1 to 6 meters (typically 5–6 meters), these bars comply with tight tolerance classes such as h9 and h11 or as per customer specifications. Common stainless steel grades include SS 304 for general corrosion resistance, SS 316 for enhanced saltwater and chemical resistance, SS 303 for high machinability, SS 410/416 for hardness and magnetic properties, SS 420 for hardenable applications, and Duplex grades 2205/2507 for high strength and corrosion resistance in harsh environments like oil & gas and marine sectors. Key applications encompass forging stock, machined components like shafts and pins, valve and pump parts, as well as gears and rollers, making SS Black Round Bars an essential raw material for manufacturing durable and high-performance industrial parts.
Key Features
| Features | Description |
|---|---|
| Material Type | Hot-rolled solid stainless steel |
| Surface Finish | Black/mill scale finish (unpolished, untreated) |
| Diameter Range | 12 mm to 350 mm (1/2" to 14") |
| Length Range | 1 meter to 6 meters (standard 5–6 meters) |
| Tolerance | h9, h11 or customer specifications |
| Common Grades | SS 304, SS 316, SS 303, SS 410/416, SS 420, Duplex 2205/2507 |
| Corrosion Resistance | Excellent, varies by grade |
| Mechanical Properties | High strength and hardness grades available |
| Typical Applications | Forging stock, machined components, valve & pump parts, gears & rollers |
| Attributes | Description |
|---|---|
| Diameter (Outer Diameter) | 12 mm to 350 mm |
| Length | 1 meter to 6 meters (standard 5-6 meters) |
| Surface Condition | Black/mill scale finish (no surface treatment) |
| Manufacturing Process | Hot rolling |
| Tolerance Class | h9, h11 or customized |
| Grades Available | SS 304, SS 316, SS 303, SS 410, SS 416, SS 420, Duplex 2205, Duplex 2507 |
| Common Uses | Forging, machining, manufacturing industrial components |
| Corrosion Resistance | Grade dependent, excellent overall |
| Magnetic Properties | Present in grades SS 410/416 (magnetic), non-magnetic in SS 304/316 |
*Disclaimer: The above description has been AI-generated and has not been audited or verified for accuracy. It is recommended to verify product details independently before making any purchasing decisions.
The black/mill scale finish indicates the bar surface is untreated and has not been polished or pickled post hot rolling, retaining a rough surface that can improve adhesion during forging but may require additional surface preparation for applications needing a smooth finish.
Yes, SS Black Round Bars can be customized to specific length requirements from 1 meter up to 6 meters and can meet tolerance classes such as h9, h11, or customer-defined specifications.
Grade SS 316 is highly recommended for marine and chemical environments due to its molybdenum content that enhances resistance to saltwater and corrosive chemicals.
Magnetic properties depend on the grade; for instance, SS 410 and 416 grades are magnetic, whereas SS 304 and 316 are generally non-magnetic.
Typical uses include forging stock, machining into shafts, pins, bushings, manufacturing valve and pump parts, rollers, and gears requiring high strength and corrosion resistance.
Country Of Origin: India
🔧 What are SS Black Round Bars?
SS Black Round Bars are hot-rolled, solid stainless steel bars with a black/mill scale finish — meaning they haven't been pickled, polished, or surface-treated after rolling.
✅ Key Characteristics:
Rough surface (mill scale/oxidation layer)
Excellent strength and corrosion resistance
Ideal for forging, machining, and industrial applications
📏 Standard Size Range
Property Range
Diameter (OD) 12 mm to 350 mm (1/2" to 14")
Length 1 meter to 6 meters (standard: 5–6 m)
Tolerance h9, h11, or as per customer spec
🧬 Common Grades
Grade Features Common Uses
SS 304 General corrosion resistance Forging, machine parts
SS 316 Molybdenum = saltwater & chemical resistance Marine, pharma
SS 303 Excellent machinability Precision machining
SS 410 / 416 High hardness, magnetic Tools, shafts
SS 420 Hardenable Knives, dies
Duplex 2205 / 2507 High strength + corrosion Oil & gas, marine
🏗️ Applications
Forging stock
Machined components (shafts, pins, bushings)
Valve and pump parts
Rollers & gears
