Factory-direct steel gratings & stair treads, shipped worldwide
Corten Grating
Corten Grating: every batch ships with traceable mill test certificates.
Weathering steel is not one of our stock lines — it is quoted per project with material certification. Our stock mill materials are Q235B, SS304 and SS316; tell us your weathering-grade requirement and we will quote it per project.
Itemized quote within 24 hours · Free drawing review included
Factory-direct, 4 product lines
Welded, press-locked, treads and stainless under one roof
Certified & tested
Reports on request — MTC with every shipment
Samples in 5–7 days
Production in 15–25 working days
FOB Tianjin
Shipped worldwide, EXW / CIF negotiable
Material comparison
Steel Grating Material Comparison — Where Corten Fits
Material is the first filter in a grating specification. These are the four grades our mill materials actually cover — with weathering steel shown for what it is: a special grade we quote per project, not a stock line.
| Material | Corrosion behavior | Typical environments | Relative cost | Documents |
|---|---|---|---|---|
| Carbon steel Q235B | Needs a coating — shop primer, paint or hot-dip zinc | Dry indoor platforms, shop floors, stair stringers, railed-off walkways | The baseline of the four | MTC EN 10204 3.1 per heat |
| Hot-dip galvanized Q235B | Zinc coating shields the steel — corrosion-resistant outdoors | Outdoor walkways, trench covers, guardrails, plant perimeters | Carbon steel plus a galvanizing step | MTC + coating checks to ASTM A123 / ISO 1461 |
| Stainless SS304 | Corrosion-resistant with no coating at all | Food plants, washdown areas, general chemical duty | Higher than coated carbon steel | MTC EN 10204 3.1 |
| Stainless SS316 | Strongest of the four against chlorides and brine | Coastal and marine platforms, chemical drainage, saline washdown | The highest of the four | MTC EN 10204 3.1 |
| Weathering steel (corten)Quoted per project | Grows a self-protecting patina in wet–dry cycles — not for constant wetness | Facade screens, landscaping, architectural features, with runoff detailing | Special grade — sourced and priced per project | Material certification scoped with your quote |
Weathering steel is not a Dengtai stock line. It is quoted per project with material certification; our stock mill materials are Q235B, SS304 and SS316. Tell us your weathering-grade requirement and we will quote it per project — no stock claims, no corten production program.
Not sure which grade fits your site? Send your drawings — we will spec it inside the 24-hour quote.
What corten actually is
Weathering Steel: Where the Patina Logic Works — and Where It Does Not
Corten grating searches usually mean one of two things: an architectural feature in bare weathering steel, or a grating that simply will not rust through. Those are different products, and only one of them is really corten.
A steel that rusts on purpose
Corten is the familiar trade name for weathering steel: carbon steel alloyed with copper, chromium and nickel so that its surface oxide becomes a dense, adherent patina instead of flaking rust. Cycled through wet and dry weather, that layer slows further attack — which is why it is often specified bare, for its warm brown finish rather than any coating.
Where the patina logic works
Freely exposed, ventilated surfaces that dry between rains: facade screens, cladding panels, landscaping edges and architectural features. Detailing must let water leave quickly and keep the steel breathing — the patina stabilizes only when the surface cycles, and open-mesh grating is one of the better formats for that.
Where it does not work
Where steel stays wet — buried edges, submerged or constantly washed lines — the patina never stabilizes. And rainwater running off weathering steel carries rust streaks that stain concrete and light surfaces below. Trench and floor grating is exactly that duty, so corten there needs deliberate drainage and runoff detailing — or a switch to hot-dip galvanized or stainless.
Why ask here
Why Buyers Ask Dengtai About Corten Grating
Corten grating, made to spec
Any size and any grade option — panels cut and banded to your drawings, from small MOQ. Weathering grades such as ASTM A588 or EN 10025-5 S355J0W are quoted per project with the material certification scoped before you commit; our stock lines run Q235B, SS304 and SS316.
Rust-resistant — with honest limits
Weathering steel is rust-resistant by chemistry: its patina protects instead of flaking, with no paint and no zinc. Where that logic does not fit — wet trenches, buried edges, washdown floors — say so in your RFQ and we will spec hot-dip galvanized Q235B or SS316 instead, the proven answers for those sites.
Mill cert with every shipment
Whatever grade ships, it ships proven: mill test certificates (EN 10204 Type 3.1) with every shipment, traceable heat by heat and ready to preview with your quote. For per-project weathering steel, the certificate for the sourced material is part of the offer — a material fact, not a material claim.
Applications
Where Weathering Steel Grating Is Specified
Bare steel with a designed finish — corten grating earns its place where the patina can cycle, the runoff is planned, and the look matters as much as the load.
Facade & architectural screens
Open-mesh screens and sun shading where the oxide patina is the finish — freely exposed, ventilated, drying between rains.
Landscaping & exterior features
Tree grates, edging and feature panels in the warm rust tone — detail drainage so streaks never reach adjacent paving.
Feature flooring, with care
Entrance areas and feature decks are possible — drip edges, sealed adjacent surfaces and planned runoff paths belong in the drawing set.
Wet duty — specify the alternative
For trench, drainage and washdown floors we recommend hot-dip galvanized Q235B or SS304 / SS316 — honest engineering beats a patina that never forms.
Specifications
Corten Grating Specifications
| Parameter | Range / answer |
|---|---|
| Buyer’s term | Corten grating · weathering steel grating |
| Supply basis | Quoted per project with material certification — not a stock line |
| Stock mill materials | Q235B carbon steel · SS304 / SS316 stainless |
| Bearing bar (our lines) | 20×3 mm to 100×8 mm, plain or serrated |
| Bar spacing | 30 / 40 / 60 mm · close mesh to 11/11 mm press-locked |
| Panel width × length | Up to 1.25 m × 6 m, cut and banded to size |
| Patina engineering | Requires wet–dry cycling; plan runoff, drainage and drip detailing |
| Documents | MTC EN 10204 3.1 · inspection report · DoC per destination |
Materials & test documents
Every heat of our stock Q235B, SS304 or SS316 enters production with its mill test certificate verified at goods-in — the first of our five QC stages. Weathering steel is quoted per project, and its material certification is scoped before production starts:
- Mill test certificate to EN 10204 Type 3.1, per heat
- Factory inspection report with every shipment
- Declaration of Conformity prepared per order destination
Load tables & calculators → · The HDG alternative, explained →
Standards & compliance
Produced to Recognized Standards — Documents on Request
ANSI / NAAMM MBG 531
Grating panels produced to MBG 531 reference practice, with weld inspection on our five-stage QC plan.
ASTM A123 / ISO 1461 HDG
When galvanized Q235B is the honest answer, coating thickness is checked by sampling on every batch before release.
CE & SGS tested
Certified & tested, reports on request — we show documents you can verify, not a certificate wall.
Custom made
Requesting Corten Grating: the Per-Project Path
Send your drawing and grade
Panel sizes, the weathering grade you need, finish and quantities — or just photos and a sketch. Weathering-steel projects are reviewed per project; drawing review is free.
Quote within 24 hours
Itemized, FOB Tianjin as standard — EXW or CIF on request. The material certification for the sourced weathering steel is scoped in the same quote. Small trial orders welcome.
Samples in 5–7 days, production in 15–25
Working days after drawing confirmation on our standard lines; per-project weathering-steel lead times are confirmed with your quote. Installation drawings and fixing layout ship with the order.
Factory-direct quote
Send Your Corten Grating Specs
Send your corten grating specs for a factory quote — itemized within 24 hours, with free drawing review and material certs ready to preview.
- Mill test certificates (EN 10204 Type 3.1) with every shipment
- Weathering steel quoted per project with material certification — no false stock claims
- Factory audits welcome — see the lines before you commit
Prefer to talk? WhatsApp us or sales@dtsteelladder.com
Request your quote
Five fields — we do the rest.
FAQ
Frequently Asked Questions
Do you keep corten grating in stock?
No — and we say so plainly. Weathering steel is not a Dengtai stock line and we run no corten production program. Corten grating is quoted per project with material certification; our stock mill materials are Q235B, SS304 and SS316. Tell us your weathering-grade requirement and we will quote it per project.
Where does the weathering steel patina work — and where does it not?
The patina logic works where panels cycle wet and dry in free air: facade screens, cladding, landscaping and architectural features. It does not work where steel stays wet or buried, and rainwater runoff carries rust streaks that stain concrete and adjacent surfaces — so trench and floor grating in weathering steel needs careful drainage detailing, or a switch to hot-dip galvanized or stainless.
How do I request corten grating from Dengtai?
Send the weathering grade you need, panel sizes and quantities through the quote form below. You receive an itemized quote within 24 hours; on our standard lines samples ship in 5–7 working days and production runs 15–25 working days after drawing confirmation. Whatever the grade, you receive mill test certificates (EN 10204 Type 3.1) with every shipment.
Related pages
Related Grating Pages
Structural Steel Grating
Q235B structural duty, produced to MBG 531 reference practice.
View page →Black Grating
Uncoated mill finish — oiled for export, primed or HDG on request.
View page →Q235 Steel Grating
The Q235B grade page — MTC with every shipment, the carbon baseline.
View page →Carbon Steel Bar Grating
The workhorse grade behind most grating orders we ship.
View page →Structural Grating
The structural band — load-rated grating across materials.
View page →Wrought Iron Grating
Another near-name material, answered honestly: today it means Q235B.
View page →