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Round = General-purpose round bar, for rough processing
Rod = Smaller, more precise bar
Sheet = Thin flat product (≤6mm)
Plate = Thick flat product (≥6mm)
Tube = For aesthetic/structural use
Pipe = For fluid transport (rated by pressure/standard)
Reference Standard: ASTM A276 (Standard Specification for Stainless Steel Bars and Shapes – Hot-Rolled and Cold-Drawn)
Definition: Solid bars with various cross sections (round, square, hexagonal, etc.) used for general structural and machining applications.
Note: In ASTM terminology, “round bar” and “rod” are often used interchangeably. However, “rod” typically refers to smaller diameter, cold-drawn bars with higher dimensional precision.
Reference Standard: ASTM A240 (Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications)
Definition Differences:
Sheet: Thickness < 6.35 mm (1/4 inch)
Plate: Thickness ≥ 6.35 mm
Both are flat products, but differ in thickness and application focus.
Reference Standard: ASTM A312 (Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes)
Application: Used for transporting fluids. Emphasizes internal diameter, nominal pipe size (NPS), and pressure class (e.g., SCH 40).
Reference Standards:
ASTM A269 (Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service)
ASTM A554 (Standard Specification for Welded Stainless Steel Mechanical Tubing)
Focus: Outer diameter and surface quality. Typically used for structural, mechanical, or decorative purposes.
Standards: ASME B36.10M / B36.19M
Definition: Define nominal sizes and wall thickness schedules (e.g., SCH 10, SCH 40) for stainless steel pipes.
Use: Commonly applied with ASTM A312 in industrial piping systems.
ISO 15510: Stainless steel grade comparisons (does not define product forms).
ISO 9445: Tolerances and dimensions for cold-rolled strip, sheet, and plate.
ISO 1127: Standard dimensions for metallic tubes – distinguishes tube and pipe by outer diameter vs. nominal diameter.
EN 10088-2: Stainless steel flat products (both sheet and plate) for general purposes.
EN 10088-3: Stainless steel long products such as bars and wires.
| Product Type | Reference Standards | Key Definition Terms |
|---|---|---|
| Round / Rod | ASTM A276, EN 10088-3 | Solid bar, cold drawn or hot rolled |
| Sheet | ASTM A240, EN 10088-2 | Thickness < 6mm |
| Plate | ASTM A240, EN 10088-2 | Thickness ≥ 6mm |
| Tube | ASTM A269, ASTM A554, ISO 1127 | Outer diameter focus, used for structural or aesthetic use |
| Pipe | ASTM A312, ASME B36.19M | Nominal pipe size (NPS), used for fluid transport |
| English Name | Chinese Name | Definition & Characteristics |
|---|---|---|
| Round | 不锈钢圆钢 (Stainless Steel Round) | Generally refers to hot-rolled, forged, or cold-drawn solid round bars. Usually ≥10mm in diameter, used for further processing. |
| Rod | 不锈钢棒材 (Stainless Steel Rod) | May refer to round rods, hex rods, or square rods. Typically smaller-diameter solid bars (e.g., 2mm–50mm) with higher precision, suitable for fasteners, precision machining parts, etc. |
| Sheet | 不锈钢薄板 (Stainless Steel Sheet) | Typically ≤6mm in thickness, mainly cold-rolled, with smooth surface. Used in architecture, appliances, kitchen equipment, etc. |
| Plate | 不锈钢中厚板 (Stainless Steel Plate) | Typically ≥6mm in thickness, mainly hot-rolled. Suitable for pressure vessels, structural components, heavy-duty industrial applications. |
| Tube | 不锈钢管（装饰管）(Stainless Steel Tube – Decorative/Structural) | Usually refers to structural, mechanical, or decorative tubing. Can be welded or seamless. Focuses on dimensional precision and appearance, e.g., for furniture or railings. |
| Pipe | 不锈钢管（工业管）(Stainless Steel Pipe – Industrial) | Commonly used for industrial piping, such as fluid transport, heat exchangers, boilers. Emphasizes wall thickness, pressure rating, and standard specifications (e.g., SCH10, SCH40). |
| Category | Solid | Hollow | Main Application Focus | Manufacturing Characteristics |
|---|---|---|---|---|
| Round/Rod | ✅ Yes | ❌ No | Machining, molds, fasteners | Hot rolling, forging, cold drawing, grinding |
| Sheet/Plate | ❌ No | ❌ No | Structure, decoration, pressure vessels | Cold-rolled (sheet) / hot-rolled (plate) |
| Tube | ❌ No | ✅ Yes | Decoration, structural, furniture | Welded / cold-drawn / seamless |
| Pipe | ❌ No | ✅ Yes | Fluid transport, high-pressure lines | Seamless / welded, standardized ratings |
Round = General-purpose round bar, for rough processing
Rod = Smaller, more precise bar
Sheet = Thin flat product (≤6mm)
Plate = Thick flat product (≥6mm)
Tube = For aesthetic/structural use
Pipe = For fluid transport (rated by pressure/standard)
Reference Standard: ASTM A276 (Standard Specification for Stainless Steel Bars and Shapes – Hot-Rolled and Cold-Drawn)
Definition: Solid bars with various cross sections (round, square, hexagonal, etc.) used for general structural and machining applications.
Note: In ASTM terminology, “round bar” and “rod” are often used interchangeably. However, “rod” typically refers to smaller diameter, cold-drawn bars with higher dimensional precision.
Reference Standard: ASTM A240 (Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications)
Definition Differences:
Sheet: Thickness < 6.35 mm (1/4 inch)
Plate: Thickness ≥ 6.35 mm
Both are flat products, but differ in thickness and application focus.
Reference Standard: ASTM A312 (Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes)
Application: Used for transporting fluids. Emphasizes internal diameter, nominal pipe size (NPS), and pressure class (e.g., SCH 40).
Reference Standards:
ASTM A269 (Standard Specification for Seamless and Welded Austenitic Stainless Steel Tubing for General Service)
ASTM A554 (Standard Specification for Welded Stainless Steel Mechanical Tubing)
Focus: Outer diameter and surface quality. Typically used for structural, mechanical, or decorative purposes.
Standards: ASME B36.10M / B36.19M
Definition: Define nominal sizes and wall thickness schedules (e.g., SCH 10, SCH 40) for stainless steel pipes.
Use: Commonly applied with ASTM A312 in industrial piping systems.
ISO 15510: Stainless steel grade comparisons (does not define product forms).
ISO 9445: Tolerances and dimensions for cold-rolled strip, sheet, and plate.
ISO 1127: Standard dimensions for metallic tubes – distinguishes tube and pipe by outer diameter vs. nominal diameter.
EN 10088-2: Stainless steel flat products (both sheet and plate) for general purposes.
EN 10088-3: Stainless steel long products such as bars and wires.
| Product Type | Reference Standards | Key Definition Terms |
|---|---|---|
| Round / Rod | ASTM A276, EN 10088-3 | Solid bar, cold drawn or hot rolled |
| Sheet | ASTM A240, EN 10088-2 | Thickness < 6mm |
| Plate | ASTM A240, EN 10088-2 | Thickness ≥ 6mm |
| Tube | ASTM A269, ASTM A554, ISO 1127 | Outer diameter focus, used for structural or aesthetic use |
| Pipe | ASTM A312, ASME B36.19M | Nominal pipe size (NPS), used for fluid transport |
For current specifications and supply options, review our stainless steel rod, tube and pipe products.