SS 321 Chequered PlateASTM A240 · Mill standard · Manufacturer, stockist & exporter, India
AISI 321 · UNS S32100
An SS 321 chequered plate is plate with a raised anti-slip pattern, made from SS 321 to ASTM A240. Chequered plate is used for platforms, walkways, trench covers and ramps.
- ASTM A240
- Mill standard
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 321 Chequered Plate?
- What it is
- Plate with a raised anti-slip pattern
- Material
- ASTM A240
- Dimensions
- Mill standard
- Grade
- SS 321 · UNS S32100
- Best at
- High-temperature service between 425 and 815 °C
SS 321 Chequered Plate Specification
| Product | SS 321 Chequered Plate |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | Mill standard |
| Thickness | 4.76 mm (3/16") and up |
| Size | Mill plates or cut to drawing |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Chequered Plate
Chequered plate is used for platforms, walkways, trench covers and ramps.
- Diamond or lentil pattern
- Anti-slip
- Structural thicknesses
More on choosing: Chequered plate guide.
SS 321 Chequered Plate: Why 321 for chequered plates
Chequered plate is used for platforms, walkways, trench covers and ramps. In SS 321, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless plate goes into vessels and heavy sections. SS 321 is picked for high-temperature service between 425 and 815 °C. |
|---|---|
| Typical service | Aircraft exhaust — Manifolds, bellows and exhaust systems. |
| Matching filler | ER347 (AWS A5.9) |
SS 321 Chequered Plate Chemical Composition
| Element | Weight % |
|---|---|
| Chromium | 17.0 – 19.0 |
| Nickel | 9.0 – 12.0 |
| Titanium | 5 × (C + N) min, 0.70 max |
| Carbon | 0.08 max |
| Manganese | 2.00 max |
| Silicon | 0.75 max |
| Nitrogen | 0.10 max |
| Phosphorus | 0.045 max |
SS 321 Chequered Plate Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 515 MPa · 75 ksi |
| Yield strength 0.2% | 205 MPa · 30 ksi |
| Elongation | 40% |
| Hardness | 217 HB max |
Full chemistry, properties and equivalents are on the SS 321 grade page.
SS 321 Chequered Plates for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 321 Chequered Plate — questions buyers ask
What thickness is chequered plate measured at?
At the base plate, excluding the raised pattern.
Which standard covers SS 321 chequered plates?
The material is ASTM A240; dimensions follow Mill standard. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 321 chequered plate?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026