Short answer: Stainless steel wire is produced as spring wire (hard drawn, spring tempered), cold heading quality (soft, headed into fasteners), weaving/mesh wire, welding wire and general-purpose wire. The most common grades are 302 / 304 general, 301 high-strength spring, 316 marine-grade and 430 magnetic. Buyers should specify temper, tensile class and surface cleanliness, not just “stainless wire.”
This guide is written for stainless steel buyers, sourcing teams, engineers and product manufacturers. The purpose is not to declare one universal winner, but to turn a broad material question into a specification that a mill or service center can quote, process and inspect consistently.
Quick Comparison
| Option | Key point | Typical use or decision |
|---|---|---|
| 302 / 304 annealed or 1/4-hard | Ductile, formable, general | Wire forms, baskets, mesh, food contact |
| 301 spring-tempered | Very high tensile, good fatigue | Compression/tension springs, clips, retaining rings |
| 316 / 316L wire | Marine / chloride-resistant | Outdoor mesh, marine springs, surgical wire |
| 430 / 430FR wire | Magnetic, lower cost | Magnetic sensors, decorative mesh, minor fasteners |
| 631 / 17-7PH | Precipitation hardening spring | High-temp or high-fatigue springs, aerospace |
The table is a starting point. Actual performance depends on the governing standard, delivered condition, dimensions, surface finish, fabrication route and service environment. Commercial names should never replace a complete purchase specification.
What Buyers Should Evaluate
- Spring wire needs a tensile strength range and temper designation (1/4 hard, 1/2 hard, full hard, spring temper, etc.).
- CHQ wire needs to reference a heading-quality standard and cold upset test.
- Weaving wire should state weave type, wire tolerance, crimp pattern and any post-weaving passivation or electropolish.
For production orders, share the end use rather than requesting a grade or finish in isolation. A supplier can then review corrosion exposure, forming severity, welding, visual requirements and packing before material is cut. This early review is usually less expensive than correcting a rejected shipment or unstable production trial. For tensile and temper selection across spring grades, see spring wire 301, 302, 316 and 631.
Common Purchasing Mistakes
- Buying the cheapest “304 wire” and then failing fatigue or spring-life testing
- Assuming 304 mesh wire will survive coastal exposure without passivation and a realistic maintenance plan
- Mixing wire tempers on a spring drawing and getting inconsistent load-stroke curves
These mistakes are avoidable when drawings, approved samples, inspection methods and certificate requirements are agreed before production. For visual products, retain a signed master sample. For functional dimensions, define where and how measurements will be taken.
Recommended RFQ Wording
Specify grade (UNS or EN standard preferred), temper/hardness class or tensile range, wire diameter with tolerance, surface finish (bright, matte, coated, passivated), standard (ASTM A313, ASTM A580, EN 10270-3), and any functional tests such as wrap, torsion, flatten or fatigue.
Also include order quantity, acceptable quantity variation, destination, required delivery date and whether partial shipments are allowed. If a requirement is critical, make it measurable and place it on the purchase order rather than only in an email conversation.
How Still Steel Supports the Project
Still Steel supplies stainless steel coil, strip and sheet and provides slitting, cut-to-length, brushing, polishing and protective-film services. We can compare available mill material with your drawing, prepare trial quantities and preserve heat-number traceability through service-center processing.
Send the grade, dimensions, annual volume and application to vip@still-steel.com, or discuss the requirement on WhatsApp.
Frequently Asked Questions
Is 304 spring wire higher strength than 302 spring wire?
In practice, 302 is more common for medium springs; 304 can be drawn to similar tempers but 301 is the standard high-tensile spring grade, offering higher tensile at equivalent ductility.
What is cold heading quality (CHQ) wire?
CHQ wire has controlled chemistry, low residual stress and a controlled surface to survive progressive header dies without cracking when forming screws, rivets or bolts.
Which mesh wire works outdoors near the coast?
316 LW (lock crimp or plain weave) is the default. For aggressive splash zones, 316L or 2205 woven mesh with passivation is often specified, not just plain 304.
Technical References
Reference documents support general selection and fabrication principles. The final material decision must follow the applicable contract, standard, regulation and engineering review for the specific product.