Stainless seamless tube
Model: JIS G3446 SUS304TK、SUS316、SUS410
Supplier: GOLDEN ASIA INDUSTRIAL CO., LTD.
Seamless stainless steel tube is pierced or extruded from a solid billet with no weld seam, giving uniform structure and strength. ID tolerance reaches H7–H9 at Ra 0.2–0.8μm, with corrosion resistance built into the material itself rather than a surface layer — SUS316 in particular suits saltwater and chemical exposure. Ideal for marine, food/pharma, and semiconductor cylinder barrels.
Highlights
- Seamless, one-piece construction — Pierced or extruded from a solid billet with no weld seam, delivering better fatigue life under cyclic pressure and higher pressure ratings
- ID tolerance H7–H9 available — H7 for precision systems, H8 for general actuators, H9 for applications tolerating looser clearance
- ID surface Ra 0.2–0.8μm — Reduces seal friction and wear for stable, reliable actuator operation
- Corrosion resistance from the material itself — Not a surface coating, so protection remains even if the surface is scratched; SUS316 offers stronger resistance to saltwater and chemicals
- Clean bore with low contamination risk — Suited to medical, food-grade, and high-purity automation systems
- Three steel grades available — SUS304TK (cost-effective, general industrial), SUS316 (enhanced corrosion resistance, marine/chemical), SUS410 (martensitic, higher strength and hardness)
- Best paired with a stainless steel chrome plated bar — Avoids galvanic corrosion between a stainless barrel and a carbon steel rod, with closely matched thermal expansion for better system reliability
Specifications
| ID Tolerance | H7、H8、H9 |
|---|---|
| Internal Roughness | Ra 0.2μm ~ Ra 0.8μm |
| Steel Grade | JIS G3446 SUS304TK、SUS316、SUS410 |
Technical Features
- ID tolerance graded to system needs — H7 suits systems requiring precise fit, H8 suits general actuators, H9 suits applications tolerating looser clearance, paired with a honed finish around Ra 0.2μm to reduce seal friction and wear
- Corrosion resistance runs through the material, not just the surface — Unlike carbon steel chrome-plated tube, stainless steel's resistance comes from its alloy composition itself; even light surface scratches or wear are unlikely to trigger spreading corrosion, and SUS316 in particular suits saltwater and chemical exposure
- Clean bore suits high-sanitation industries — Stainless surfaces are easy to clean and withstand aggressive sterilization, suiting food processing, pharmaceutical, and semiconductor cleanroom automation equipment
- Three grades selected by application — SUS304TK offers cost-effective general industrial performance; SUS316 offers stronger corrosion resistance for marine and chemical environments; SUS410 (martensitic) offers higher strength and hardness for applications prioritizing mechanical strength
Related Tagsseamless stainless steel pipestainless seamless tubehydraulic cylinder componentpneumatic cylinder component