254 SMO Sheet & Plate
254 SMO Sheet & Plates Manufacturer & Supplier
Stellar Alloys Steel Pipes and Tubes is a reliable producer of 254 SMO sheets, plates and coils, produced with respect to ASTM A240 and offered in UNS S31254 grade. 254 SMO sheets & plates is a high-alloy austenitic stainless steel created to exhibit superior performance in aggressive and chloride-rich environments that low-grade stainless steels might fail to perform in.
Having a high molybdenum and nitrogen content, 254 SMO provides a Pitting Resistance Equivalent Number (PREN) of over 42, which provides high resistance against pitting and crevice corrosion. This is why it is a perfect attempt to be used in marine and offshore applications and in chemical processing, which are subject to seawater and other difficult factory media. The 254 SMO has much greater resistance to chloride-induced attack and sulphuric acid environments than the standard grades like ASTM A240 TP316 and ASTM A240 904L.
UNS S31254 material has a low carbon structure that guarantees high levels of weldability, and it reduces the chances of intergranular corrosion. Meanwhile, it has greater mechanical strength than the majority of standard austenitic stainless steels, enabling a decreased thickness of the material to be used without affecting performance. Its remarkable resistance to stress corrosion cracking also increases its suitability for use in challenging processing systems.
Stellar Alloys Steel Pipes and Tubes offers 254 SMO products in any size, thickness and finish to suit the needs of the project. All sheets, plates and coils are fully tested to be dimensionally accurate, have corrosion resistance and are also in line with international quality standards.
In industries that need superior durability, strength and extended corrosion resistance, 254 SMO stainless steel from Stellar Alloys provides a reliable and economical service.
SMO 254 Sheets, SMO 254 Cold Rolled Sheets, Astm 240, SMO 254 Hot Rolled Plates, SMO 254 Coils Suppliers, SMO 254 Plates, SMO 254 Sheets Stockist in Mumbai, India. 254 SMO Material Data Sheet, SMO 254 Sheet & Plate, ASTM A240 SMO 254 HR Plates Dealer, UNS S31254 Sheets Supplier in Mumbai, India, DIN 1.4547 Cold Rolled Sheets Exporter.
Table of Contents
- Specification of 254 SMO Sheet & Plates
- Types of 254 SMO Plate
- 254 SMO Coil Chemical Composition
- 254 SMO Plate HS Code
- Mechanical Properties of SS 254 SMO Polished Plate
- 254 SMO Plate Equivalent Material Grades
- 254 SMO Foil Standard Thickness & Size Availability
- UNS S31254 Clad Plate Size Conversion Chart
- SS 254 SMO Tread Plate Thickness Tolerances
- AISI 254 SMO Perforated Sheet Standard Size Specifications
- Alloy 254 6 Mo Diamond Plate Gauge & Thickness Reference Chart
- SS 254 SMO Tread Plate Standard Dimensions
- ASTM A240 UNS S31254 Hot Rolled Plate Modulus of Elasticity
- Temperature Range & Proof Strength of Alloy 254 Cold Rolled Plate
- 254 SMO Strip Heat Capacity
- Working Temperature of AISI 254 SMO Perforated Sheet
- ASTM A240 UNS S31254 Sheet Sizes Available Stock Range
- SMO 250 Plates & Sheets Price List (Indicative FOB Rates)
- Applications of SMO 254 Sheets, Plates
- FAQs About 254 SMO Sheets & Plates
Specification of 254 SMO Sheet & Plates
Category | Product / Specification | Details |
Sheet Sizes | ASTM A240 UNS S31254 | Thickness: 0.02–4.0 mm; Width: 900–2400 mm; Length: 3000–12000 mm |
Plate Sizes | Alloy 254 | Thickness: 4.5–100 mm; Width: 900–2400 mm; Length: 3000–12000 mm |
Coil Sizes | 254 SMO | Thickness: 2.5–10.0 mm; Width: 610–2000 mm |
Strip Sizes | Alloy 254 6 Mo | Thickness: 0.3–10.0 mm; Width: 4–3000 mm |
Edges | ASTM A240 UNS S31254 Sheet | Round, Rolled, Slit, Square |
Physical Properties | Alloy 254 Plate | Density: 8 g/cm³; Melting Point: 1320–1390°C; Temperature Range: 1149–1204°C (2100–2200°F); Trade Name: Sandvik 254 SMO |
Standards | 254 SMO Coil | ASTM A240; ASME SA 240; UNS S31254; WNR 1.4547 |
Origin | Alloy 254 6 Mo Strips | Japanese, Indian, Korean, European, American |
Welding | S31254 Plate | PLASMA, GMAW, GTAW, SAW |
Cutting | ASTM A240 UNS S31254 Cold Rolled Plate | Waterjet, Plasma, Laser, Oxy-propane |
Technique | AISI 254 SMO Plate | Forged, Cold Rolled, Hot Rolled |
Form | EN 1.4547 Finish Sheet | Sheet, Coil, Strip, Foil |
Hardness | UNS S31254 Coil | Soft, Quarter Hard, Half Hard |
Process | ASTM A240 S31254 Shim Sheet | Edging, Deburring, Grinding |
Application | Alloy 254 Perforated Sheet | Storage tanks & silos; Filters; Heat exchangers; Pressure vessels; Nuclear sector; Sewage/Water waste services |
Finish | Alloy 254 6 Mo Strips | Brushed, Glossy, Sandblasted, Mirror |
Services | 254 SMO Coil | Slitting, Blanking, Bending, Polishing |
Testing | SS 254 SMO Polished Plate | Visual inspection; Third party inspection; Chemical test; Mechanical test |
Documentation | UNS S31254 Plate | Bill of Lading; Copy of Invoice; MTC; Origin Certificate |
Marking | ASTM A240 UNS S31254 Sheet | Origin of material; Sizes; Manufacturer logo; Material grade |
Types of 254 SMO Plate
254 SMO Foil
254 SMO Strip
AISI 254 SMO Perforated Sheet
Alloy 254 6 Mo Diamond Plate
Alloy 254 Cold Rolled Plate
Alloy 254 Shim Sheet
Alloy 254 6 Mo Diamond Plate
ASTM A240 UNS S31254 Hot Rolled Plate
EN 1.4547 Mesh Sheet
Alloy 254 6 Mo Diamond Plate
SS 254 SMO Tread Plate
UNS S31254 Clad Plate
254 SMO Coil Chemical Composition
| Element | Description | Composition (%) |
| Ni | Nickel | 23.0 – 28.0 |
| Cr | Chromium | 19.0 – 23.0 |
| Mo | Molybdenum | 4.0 – 5.0 |
| Cu | Copper | 1.00 – 2.00 (max) |
| Mn | Manganese | Up to 2.00 |
| Si | Silicon | Up to 1.00 |
| P | Phosphorus | 0.045 (max) |
| S | Sulfur | 0.035 (max) |
254 SMO Plate HS Code
| Material | HS Code |
| Alloy 254 (6 Mo) | 72192111 |
Mechanical Properties of SS 254 SMO Polished Plate
| Property | Value |
| Yield Strength | 300 MPa |
| Tensile Strength | 650 MPa |
| Elongation | 35 % |
| Hardness (HV) | 230 |
254 SMO Plate Equivalent Material Grades
| Standard | Equivalent Grade |
| WERKSTOFF NR. | 1.4547 |
| UNS | S31254 |
| SIS | 2378 |
| AFNOR | Z1 CNDU20.18.06Az |
| EN | X1CrNiMoCuN20-18-7 |
254 SMO Foil Standard Thickness & Size Availability
Available Thickness (mm) | Standard Sheet Dimensions (Length × Width) |
1.5 mm | 3000 × 1500 mm |
2 mm | 3000 × 1500 mm |
3 mm | 3000 × 1500 mm |
5 mm | 4000 × 2000 mm; 3000 × 1500 mm |
6 mm | 3000 × 1500 mm; 4000 × 2000 mm; 6000 × 2000 mm |
8 mm | 4000 × 2000 mm; 3000 × 1500 mm; 6000 × 2000 mm |
10 mm | 3000 × 1500 mm; 4000 × 2000 mm; 6000 × 2000 mm |
12 mm | 4000 × 2000 mm; 3000 × 1500 mm; 6000 × 2000 mm |
15 mm | 4000 × 2000 mm; 6000 × 2000 mm |
20 mm | 6000 × 2000 mm; 4000 × 2000 mm |
UNS S31254 Clad Plate Size Conversion Chart
Metric Size (mm) | Equivalent Size (Inches) |
3.18 mm | 0.125 in |
3.40 mm | 0.134 in |
3.96 mm | 0.156 in |
4.75 mm | 0.187 in |
6.35 mm | 0.250 in |
7.92 mm | 0.312 in |
9.53 mm | 0.375 in |
12.70 mm | 0.500 in |
15.90 mm | 0.625 in |
19.10 mm | 0.750 in |
22.20 mm | 0.875 in |
25.40 mm | 1.000 in |
50.80 mm | 2.000 in |
76.20 mm | 3.000 in |
SS 254 SMO Tread Plate Thickness Tolerances
Nominal Thickness Range (inches) | Nominal Thickness (mm) | Width ≤ 60 in (1525 mm) Tolerance (mm) | Width > 60 in (1525 mm) Tolerance (mm) |
0.072 in | 1.83 mm | ±0.006 (0.15) | ±0.009 (0.22) |
>0.072 – 0.083 in | 1.83 – 2.11 mm | ±0.007 (0.18) | ±0.010 (0.25) |
>0.083 – 0.098 in | 2.11 – 2.49 mm | ±0.008 (0.20) | ±0.011 (0.27) |
>0.098 – 0.114 in | 2.49 – 2.90 mm | ±0.009 (0.23) | ±0.012 (0.30) |
>0.114 – 0.130 in | 2.90 – 3.30 mm | ±0.011 (0.27) | ±0.013 (0.33) |
>0.130 – 0.145 in | 3.30 – 3.68 mm | ±0.012 (0.30) | ±0.013 (0.33) |
>0.145 – 0.1875 in | 3.68 – 4.76 mm | ±0.013 (0.33) | ±0.014 (0.35) |
>0.1875 – 0.250 in | 4.76 – 6.35 mm | -0.010 (0.25) / +0.020 (0.50) | -0.010 (0.25) / +0.020 (0.50) |
>0.250 – 0.3125 in | 6.35 – 7.94 mm | -0.010 (0.25) / +0.022 (0.55) | -0.010 (0.25) / +0.022 (0.55) |
>0.3125 in | >7.94 mm | -0.010 (0.25) / +0.030 (0.75) | -0.010 (0.25) / +0.030 (0.75) |
AISI 254 SMO Perforated Sheet Standard Size Specifications
Full Sheet Size (mm) | Thickness (mm) | Hole Centre (mm) | Hole Diameter (mm) |
2000 × 1000 | 0.06 | 1.05 | 0.75 |
2000 × 1000 | 1.00 | 2.00 | 1.00 |
2000 × 1000 | 1.00 | 2.06 | 1.05 |
2000 × 1000 | 1.00 | 3.05 | 2.00 |
2000 × 1000 | 1.00 | 5.00 | 3.00 |
2000 × 1000 | 1.00 | 5.06 | 4.00 |
2000 × 1000 | 1.00 | 8.00 | 5.00 |
2000 × 1000 | 1.00 | 8.00 | 6.00 |
2000 × 1000 | 1.00 | 10.00 | 8.00 |
Alloy 254 6 Mo Diamond Plate Gauge & Thickness Reference Chart
Thickness (mm) | Thickness (Inches) | Gauge No. |
4.0365 mm | 0.017187 in | 8 |
3.0968 mm | 0.015625 in | 9 |
3.0571 mm | 0.014062 in | 10 |
3.0175 mm | 0.012500 in | 11 |
2.0778 mm | 0.010937 in | 12 |
1.0984 mm | 0.007812 in | 14 |
1.0587 mm | 0.006250 in | 16 |
1.0270 mm | 0.005000 in | 18 |
0.09525 mm | 0.003750 in | 20 |
0.07937 mm | 0.003125 in | 22 |
0.06350 mm | 0.002500 in | 24 |
0.04760 mm | 0.001875 in | 26 |
0.03960 mm | 0.001562 in | 28 |
0.03175 mm | 0.001250 in | 30 |
SS 254 SMO Tread Plate Standard Dimensions
Parameter | Cold Rolled Coil & Sheet | Hot Rolled Coil & Plate | Quarto Plate |
Width (mm) | < 2000 | < 1524 | < 2700 |
Finish | 2E | Hot Rolled White | Hot Rolled White |
Thickness (mm) | 0.60 – 6.35 | 6.00 – 6.35 | 7.00 – 40.00 |
ASTM A240 UNS S31254 Hot Rolled Plate Modulus of Elasticity
Temperature | 20°C (68°F) | 100°C (200°F) | 200°C (400°F) | 300°C (600°F) | 400°C (800°F) | 500°C (1000°F) |
ksi | 28.3 | 27.6 | 27.5 | 25.1 | 23.8 | 22.5 |
MPa | 195 | 190 | 182 | 174 | 166 | 158 |
Temperature Range & Proof Strength of Alloy 254 Cold Rolled Plate
Temperature (°C) | Rp1.0 – Proof Strength (MPa, min) | Rp0.2 – Proof Strength (MPa, min) |
100°C | 200 | 170 |
200°C | 225 | 190 |
300°C | 270 | 230 |
400°C | 190 | 160 |
500°C | 180 | 148 |
254 SMO Strip Heat Capacity
Temperature (°C) | Temperature (°F) | Heat Capacity (J/kg·°C) | Heat Capacity (Btu/ft·h·°F) |
20°C | 68°F | 485 | 0.12 |
100°C | 200°F | 510 | 0.12 |
200°C | 400°F | 535 | 0.13 |
300°C | 600°F | 565 | 0.14 |
400°C | 800°F | 585 | 0.14 |
500°C | 1000°F | 600 | 0.14 |
600°C | 1200°F | 615 | 0.15 |
700°C | 1400°F | 625 | 0.15 |
Working Temperature of AISI 254 SMO Perforated Sheet
| Property | Temperature Range |
| Hot Working | 982 – 1149°C (1800 – 2100°F) |
| Annealing | 1149 – 1204°C (2100 – 2200°F) |
ASTM A240 UNS S31254 Sheet Sizes Available Stock Range
Make / Origin | Material Form | Thickness Range | Available Sizes (mm) | Specification Standards |
Indian, European & Japanese Origin | 254 SMO Plate / Sheet / Flat / Coil | 0.1 mm – 12 mm | 1000 × 2000 | |
1220 × 2440 (4′ × 8′) | ||||
1250 × 2500 | ||||
1500 × 3000 | ||||
2000 × 2000 | ||||
2000 × 4000 | ||||
Conforming to IS / BS / ASTM / UNS |
SMO 250 Plates & Sheets Price List (Indicative FOB Rates)
| Product | Price Range (USD) | Unit | Price Type | SMO 254 HR Plates | $800 – $3000 | Per Metric Ton | FOB |
| Hot Rolled SMO 254 Plates | $605 – $629 | Per Metric Ton | FOB |
| SMO 254 Cold Rolled Sheets | $800 – $4000 | Per Metric Ton | FOB |
| SMO 254 Plates | $500 – $800 | Per Metric Ton | FOB |
| SMO 254 CR Sheets | $560 – $670 | Per Ton | FOB |
| SMO 254 HR Plates | $500 – $900 | Per Ton | FOB |
Applications of SMO 254 Sheets, Plates
SMO 254 (UNS S31254) sheets and plates are widely used in industries that require exceptional resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking.
- Marine & Offshore Structures – Ideal for seawater handling systems, desalination plants, and offshore platforms.
- Chemical Processing Industry – Used in reactors, pressure vessels, storage tanks, and heat exchangers handling acidic and chloride-rich media.
Oil & Gas Industry – Suitable for piping systems, scrubbers, and processing equipment exposed to harsh chemicals.
Desalination Plants – Applied in evaporators and brine heaters due to excellent resistance to seawater corrosion.
Pulp & Paper Industry – Used in bleaching equipment and chemical recovery units.
- Flue Gas Desulfurization (FGD) Systems – Effective in environments containing high sulphur and acidic condensates.
Power Generation Plants – Utilized in condensers and cooling water systems.
Pharmaceutical & Food Processing Equipment – Preferred where high corrosion resistance and hygiene standards are essential.
FAQs About 254 SMO Sheets & Plates
SMO 254 is a high-alloy austenitic stainless steel known for its excellent resistance to pitting, crevice corrosion, and chloride attack. It is designated as UNS S31254 and commonly supplied under ASTM A240 specifications.
SMO 254 offers high mechanical strength, superior resistance to seawater corrosion, strong performance in acidic environments, and excellent weldability due to its low carbon content.
It is widely used in marine applications, offshore platforms, desalination plants, chemical processing equipment, heat exchangers, and oil & gas systems exposed to aggressive chloride environments.
Yes, SMO 254 provides significantly higher resistance to pitting and crevice corrosion compared to 316 and 904L grades, especially in high-chloride and seawater conditions.
Yes, SMO 254 has good weldability and can be welded using standard austenitic stainless steel welding procedures with proper filler materials.