Comparison hub
A500 against the alternatives
A500 competes for line items with mechanical tubing, pipe, and the newer A1085 HSS specification. These pages compare intent, qualification, and practical selection.
On this page
The short answer
Choose the specification by what the design needs the product to guarantee. A500 guarantees structural strength classes in HSS shapes. A513 guarantees mechanical-tubing process routes and dimensional behavior. A53 guarantees pipe intended for mechanical and pressure service. A1085 guarantees a single higher-performance HSS class with tighter mass and tolerance provisions.
| Specification | Product intent | Shapes | Typical decision driver |
|---|---|---|---|
| ASTM A500 | Structural tubing / HSS | Round, square, rectangular, special | Default structural HSS choice |
| ASTM A513 | ERW mechanical tubing | Round, square, rectangular, special | Machining, fits, surface, tight dimensions |
| ASTM A53 | Steel pipe, black or galvanized | Round (NPS system) | Pressure/mechanical pipe service, threading |
| ASTM A1085 | Cold-formed welded HSS | Round, square, rectangular | Tighter tolerances, single grade, optional CVN |
The detailed comparisons
Each comparison page covers scope, qualification basis, dimensional expectations, and the ordering mistakes we actually see when the two specifications get confused.
- A500 vs A513 — structural HSS vs mechanical tubing
- A500 vs A53 — HSS vs pipe, and why NPS designations are not tube sizes
- A500 vs A1085 — the incumbent vs the tighter, newer HSS specification
Sources and limitations
- ASTM A500/A500M-23 — Standard Specification for Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in Rounds and Shapes — ASTM International. Controlling specification for grades, shapes, tolerances, testing, and ordering requirements. Purchase the current edition for all normative values.
- ASTM A513/A513M — Standard Specification for Electric-Resistance-Welded Carbon and Alloy Steel Mechanical Tubing — ASTM International. Controlling specification for mechanical tubing, used for the structural-vs-mechanical comparison.
- ASTM A53/A53M-24 — Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless — ASTM International. Controlling specification for steel pipe, used for the HSS-vs-pipe comparison.
- ASTM A1085/A1085M-22 — Standard Specification for Cold-Formed Welded Carbon Steel Hollow Structural Sections (HSS) — ASTM International. Controlling specification for the tighter HSS product, used for the A500-vs-A1085 comparison.
These sources informed this page but do not substitute for the purchased standard. Numeric requirements — strengths, chemistry, and tolerance tables — are controlled ASTM content and are deliberately not reproduced on this site. The current official edition, your drawing, and your purchase order govern acceptance.