Sourcing stainless steel structural steel for real-world projects shouldn’t be a gamble. Most buyers face two constant risks: material integrity and specification accuracy. At Sanmei Metal, we solve both — from verified material sourcing to engineering-backed fabrication.
We start at the source — stainless steel coils from China’s top mills, and build forward with traceability and engineering precision.
We start from verified stainless steel coils — ensuring every stainless steel structural product you receive is authentic, traceable, and built for long-term reliability.
Consistent chemistry & mechanicals across batches
Clear heat/lot labeling and packing lists
Grades available: 201 / 304 / 304L / 316 / 316l or other SPECIAL STEEL
All stainless steel structural members are reviewed by engineers to guarantee manufacturability, fit, and precision before fabrication begins.
Drawings verified before production
Dimensions & tolerances checked vs. design
Interface & assembly clearances ensured
25×25×3 → 100×100×8 mm · 201 / 304 / 316L
10# (S8×18.4) → 20A · 304 / 316
5# → 20# · 201 / 304 / 316L
20×3 → 120×12 mm · 201 / 304 / 316L
6×6 → 40×40 mm · 201 / 304 / 316L
Ø6–508 · 10×10–300×300 · WT 0.5–8.0 mm
| Model (mm) | US / EU Size | Grades | Mill / Distribution | Application |
|---|---|---|---|---|
| 100×100×8 | 4" × 4" × 5/16" | 304 | Jianda, Lecong | Structural & support framing |
| 80×80×8 | 3-1/8" × 3-1/8" × 5/24" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Building frames, supports |
| 80×80×7 | 3-1/8" × 3-1/8" × 9/32" | 304 / 316L | Jianda | Structural reinforcement |
| 80×80×6 | 3-1/8" × 3-1/8" × 1/11" | 201 / 304 / 316L | Jianda, Lecong | Medium-duty frames |
| 80×80×4 | 3-1/8" × 3-1/8" × 5/32" | 201 / 304 / 316L | Lecong | Light structural use |
| 75×75×6 | 3" × 3" × 1/4" | 304 | Lecong | Medium mechanical |
| 75×75×5 | 3" × 3" × 3/19" | 304 | Lecong | Machinery frames |
| 70×70×7 | 2-3/4" × 2-3/4" × 9/32" | 304 / 316L | Jianda | Heavy-duty |
| 70×70×6 | 2-3/4" × 2-3/4" × 1/4" | 304 / 316L | Jianda | General fabrication |
| 70×70×2 | 2-3/4" × 2-3/4" × 5/64" | 201 | Lecong | Decorative / light |
| 63×63×6 | 2-1/2" × 2-1/2" × 1/4" | 304 / 316L | Jianda | Industrial frameworks |
| 60×60×6 | 2-3/8" × 2-3/8" × 1/19" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Structural supports |
| 60×60×5 | 2-3/8" × 2-3/8" × 3/38" | 201 / 304 / 316L | Yaxing, Jianda, Lecong | Mechanical & construction |
| 50×50×6 | 2" × 2" × 1/22" | 201 / 304 | Tsingshan, Lecong | Light fabrication |
| 50×50×5 | 2" × 2" × 3/38" | 201 / 304 / 316L | Tsingshan, Jianda, Yaxing, Lecong | Common framing |
| 50×50×4 | 2" × 2" × 5/49" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Construction, edges |
| 50×50×3 | 2" × 2" × 1/8" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Standard frames |
| 40×40×5 | 1-9/16" × 1-9/16" × 3/16" | 201 / 304 | Jianda, Lecong | Bracing, light mech. |
| 40×40×4 | 1-9/16" × 1-9/16" × 5/32" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Light fabrication |
| 40×40×3 | 1-9/16" × 1-9/16" × 1/8" | 201 / 304 / 316L | Tsingshan, Jianda, Lecong | Common structural |
| 38×38×3 | 1-1/2" × 1-1/2" × 1/8" | 201 | Lecong | Small frames, furniture |
| 30×30×4 | 1-3/16" × 1-3/16" × 5/32" | 201 | Lecong | Small frameworks |
| 30×30×3 | 1-3/16" × 1-3/16" × 1/8" | 201 / 304 / 316L | Baosteel Tsingshan, Jianda, Lecong | Light mechs |
| 30×30×1.5 | 1-3/16" × 1-3/16" × 1/16" | 201 / 304 | Lecong | Decorative framing |
| 30×30×1 | 1-3/16" × 1-3/16" × 1/32" | 304 | Lecong | Decoration, furniture |
| 25×25×3 | 1" × 1" × 1/8" | 201 / 304 | Lianzhong, Jianda, Lecong | Machinery, light frames |
| 25×25×2 | 1" × 1" × 1/8" | 304 | Lecong | Decorative |
| 25×25×1.5 | 1" × 1" × 1/16" | 304 | Lecong | Light support |
| 20×20×1.5 | 1" × 1" × 1/16" | 201 / 304 | Tsingshan, Lecong | Small mech. frames |
| 20×20×1.2 | 13/16" × 13/16" × 3/64" | 304 | Lecong | Furniture, enclosure |
| 15×15×1.5 | 5/8" × 5/8" × 1/16" | 201 / 304 / 316L | Lecong | Trims |
| 15×15×1 | 5/8" × 5/8" × 1/32" | 201 / 304 / 316L | Lecong | Small edges |
| 10×10×0.8 | 3/8" × 3/8" × 1/32" | 201 / 304 / 316L | Lecong | Fine decor |
| Chinese Standard | US / EU Standard | Inch | Metric (mm) | Grades | Origin | Application |
|---|---|---|---|---|---|---|
| 10# | S 8 × 18.4# | 8.11″ × 0.220″ × 3.00″ | 206 × 5.59 × 76.2 | 201 / 304 / 316 | Lecong | Medium-load framing |
| 20A | — | 7.874″ × 0.217″ × 3.937″ | 200 × 5.5 × 100 | 304 | Lecong | Bridge / construction |
| Model (CN) | US / EU Size | Grade | Mills / Distribution | Application |
|---|---|---|---|---|
| 8# | 3-1/8" × 1-11/16" × 3/16" web (Tapered) | 201 / 304 / 316L | Tsingshan, Jianda, Yaxing, Lecong | Building frames |
| 6.3# | 2-1/2" × 1-9/16" × 3/16" web (Tapered) | 304 / 316L | Wenzhou Taigang, Jianda, Lecong | Mechanical frames |
| 6# | 2-3/8" × 1-7/16" × 3/16" web (Tapered) | 201 / 304 / 316L | TSINGSHAN, Jianda, Lecong | Supports |
| 5# | 2" × 1-1/2" × 3/16" web (Tapered) | 201 / 304 / 316L | Lianzhong, Jianda, Lecong | Small structures |
| 20# | 7-7/8" × 2-7/8" × 1/4" web (Tapered) | 304 | Yaxing, Lecong | Heavy-duty |
| 18# | 7-1/8" × 2-11/16" × 1/4" web (Tapered) | 304 | TSINGSHAN, Yaxing, Lecong | Shipbuilding |
| 16A# | 6-1/4" × 2-9/16" × 5/16" web (Tapered) | 304 / 316L | Jianda, Lecong | Platforms |
| 16# | 6-1/4" × 2-1/2" × 1/4" web (Tapered) | 201 / 304 / 316L | Yongjin, Jianda, Lecong | Mechanical frameworks |
| 14B# / 14A# / 14# | 5-1/2" × 2-3/8" × 5/16" web (Tapered) | 201 / 304 / 316L | TSINGSHAN, Yaxing, Jianda, Lecong | Light enclosures |
| 12.5# | 5" × 2-1/4" × 1/4" web (Tapered) | 304 / 316L | Jianda, Lecong | Equipment supports |
| Size (mm) | US / EU | Grade | Origin | Application |
|---|---|---|---|---|
| 120×12 | 5" × 1/2" | 304 | Wuxi, Lecong | Heavy structural |
| 100×10 | 4" × 3/8" | 201 / 304 / 316L | Lecong | General frames |
| 80×8 | 3" × 3/8" | 201 | Lecong | Reinforcement |
| 60×8 | 2-1/2" × 3/8" | 201 | Lecong | Light fabrication |
| 60×6 | 2-1/2" × 1/4" | 201 / 304 / 316L | Lecong | Components |
| 50×8 | 2" × 3/8" | 201 | Lecong | General use |
| 50×6 | 2" × 1/4" | 201 | Lecong | Standard fabrication |
| 50×5 | 2" × 3/16" | 201 / 304 / 316L | Yongjin, Lecong | Machinery & framework |
| 40×8 | 1-1/2" × 3/8" | 201 / 304 / 316 | Qingshan, Yaxing, Lecong | Brackets |
| 30×3 | 1-1/4" × 1/8" | 201 / 304 / 316L | Yongjin, Lecong | Light / decor |
| 25×3 | 1" × 1/8" | 201 | Lecong | Light supports |
| 20×3 | 3/4" × 1/8" | 201 / 304 | Lianzhong, Jianda, Lecong | Frames & guards |
| Size (mm) | Inch | Grade | Origin | Application |
|---|---|---|---|---|
| 40×40 | 1-1/2" × 1-1/2" | 201 / 304 / 316L | Lecong | Structural / mechanical |
| 30×30 | 1-1/4" × 1-1/4" | 201 / 304 / 316L | Lecong | Machinery frames |
| 25×25 | 1" × 1" | 201 / 304 / 316L | Lecong | Brackets, supports |
| 20×20 | 3/4" × 3/4" | 201 / 304 / 316L | Lecong | Fabrication |
| 15×15 | 5/8" × 5/9" | 201 / 316L | Lecong | Light / decor |
| 14×14 | 9/16" × 9/16" | 201 | Lecong | Furniture frames |
| 12×12 | 1/2" × 1/2" | 201 | Lecong | Light duty |
| 10×10 | 3/8" × 3/8" | 201 | Lecong | Fine mech / decor |
| 6×6 | 1/4" × 1/4" | 304 | Qingshan, Lecong | Precision |
| 5×5 | 3/16" × 3/16" | 201 / 304 / 316L | Qingshan, Lecong | Small structures |
| Type | Range | Standards | Common Grades | Finishes |
|---|---|---|---|---|
| Square Tube | 10×10–300×300 mm · 0.8–8.0 mm WT | GB/T12770 · ASTM A554 · JIS G3446 | 201 · 304/L · 316/L · 321 · 310S | HL · No.4 · 2B · Mirror |
| Rectangular Tube | 10×20–250×300 mm · 0.8–8.0 mm WT | GB/T12770 · ASTM A554 · JIS G3446 | 201 · 304/L · 316/L · 321 · 310S | HL · No.4 · 2B · Mirror |
| Round Tube | Ø6–Ø508 mm · 0.5–8.0 mm WT | GB/T12770 · ASTM A554 · JIS G3446 · JG/T 3030 · YB/T 5363 | 201 · 304/L · 316/L · 321 · 310S | Pickled/Annealed · Sanitary options |
Our focus is on geometry — making sure each custom structural steel element integrates seamlessly into your overall design.
From the first drawing review to the final shipment, Sanmei’s engineering support ensures your stainless steel structural steel project is delivered exactly to spec — without costly rework or delay.
Beyond dimensions and geometry, Sanmei provides a complete range of fabrication support to make your stainless steel structural steel project installation-ready:
Drilling — accurate hole positioning based on your assembly drawings
Welding — certified welders and controlled joining processes
Polishing — optional surface finishing for architectural applications
Assembly — partial or full pre-assembly available upon request
For channels, beams, angles, and SHS/RHS tubes, dependable performance starts with the mill. SANMEI integrates China’s most recognized stainless steel manufacturers and market hubs to supply structural-grade stainless steel with stable quality, flexible customization, and full origin traceability.
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tssgroup.com.cnPrecision cold-rolled stainless steel with excellent flatness and surface quality — ideal for architectural channels, trims, and light structural sections where appearance and dimensional consistency matter.
yjgf.comEstablished producer of stainless bars and profiles. Stable output and strict standards — a reliable source for structural channels, angles, and support members requiring consistent mechanical properties.
yaxingsteel.comFoshan-based manufacturer and processor supplying channels, angles, flats, and tubes. Large inventories, quick response, and dependable fabrication capability for South China structural demand.
China’s largest stainless distribution and processing hub. Aggregates hundreds of mills and fabricators — including Xinzewang, Huatai, Mingjianwang, Kaide, Dayuanyongfei, and Xingxurong — enabling rapid availability from standard profiles to custom channel sections.
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