Stainless Steel Threaded Rod SS304 SS316 A2-70 A4-80 (DIN 975 / DIN 976)

The Stainless Steel Threaded Rod (commonly known as stainless all thread rod, continuous stud, or DIN 975/976 stainless bar) is a premium, corrosion-resistant continuous fastener extensively specified in chemical plant piping, food processing machinery, marine engineering, and sanitary MEP suspensions. Fabricated from high-grade austenitic stainless steel alloys (SS304 / A2-70 and SS316 / A4-80) and rolled continuously along its entire length, this fastener creates a self-healing passive chromium oxide barrier that prevents pitting corrosion, chemical degradation, and atmospheric rust in accordance with global ISO standards.

Technical Specifications of Stainless Steel Threaded Rod

Austenitic stainless steel threaded bars combine non-magnetic physical properties with exceptional chemical resistance. Grade A2-70 (SS304) provides reliable 700 MPa tensile strength for general outdoor building suspension and food-grade machinery. Grade A4-80 (SS316) contains 2–3% molybdenum addition to achieve 800 MPa tensile strength while resisting aggressive chloride ion pitting in coastal environments and chemical processing plants.

Cold Drawing and Passivation Process for Stainless Steel Threaded Rod

At our manufacturing facility in Handan, China, continuous stainless steel threaded bars undergo multi-stage cold drawing, precision thread rolling, and chemical surface passivation:

• Cold Wire Drawing & Straightening: Raw stainless steel wire rods are drawn to precise pitch diameters and axially straightened to maintain tight straightness across standard 1m, 2m, or 3m cut lengths.
• Continuous Two-Roll Thread Rolling: High-precision dies cold-roll metric helical threads continuously without severing steel grain fibers, maximizing thread shear capacity and pitch accuracy.
• Acid Pickling & Chemical Passivation: Acid baths strip microscopic iron micro-contaminants left by tooling, allowing a dense, pure chromium oxide passive layer to regenerate over all surfaces.
• Optional Anti-Galling Coatings: Specialized dry-wax lubricants or electropolishing can be applied upon request to eliminate friction seizing during automated power driving with stainless nuts.

Corrosion Resistant Applications of Stainless Steel Threaded Rod

Thanks to their non-magnetic properties, clean silver aesthetics, and chemical stability, stainless steel threaded bars serve as vital continuous fasteners in critical industries:

• Chemical, Food & Beverage Sanitary Suspension: Hanging stainless steel piping, sanitary ductwork, bottling equipment, and cleanroom air handling systems.
• Marine Engineering & Offshore Anchoring: Dock framing, boat fittings, coastal water treatment plants, and underwater structural anchors using SS316 (A4-80).
• Cleanroom & Medical Equipment Frameworks: Assembling diagnostic equipment bases, laboratory benches, and pharmaceutical storage racks requiring frequent chemical washdowns.

Quality Assurance and Export Packaging for Stainless Steel Threaded Rod

Handan YiHao Fastener enforces strict Quality Control (QC) standards for all overseas export shipments. Testing procedures include Positive Material Identification (PMI) chemical spectro-analysis for Nickel and Chromium content, full-length axial straightness verification, thread ring gauge pass/fail checks, and tensile load testing.

For maritime transit, 1m to 3m rods are firmly bundled, wrapped in heavy-duty waterproof woven material, and strapped onto ISPM 15 compliant fumigated wooden pallets or packaged in solid wooden crates to prevent bending and surface scratching during transit.