ASTM A240 UNS S31254 Sheet

254SMO Plate also known as 6MO UNS S31254 Sheet is an austenitic steel with high ratio of molybdenum, chromium, nickel and low carbon content. Its mechanical properties are almost twice that of 300 series steel in most cases. The main performance characteristics of UNS S31254 Plate include good corrosion resistance, especially to various corrosive media such as strong acids, strong bases, oxidants, etc. Importantly, SA 240 UNS S31254 can even be used as a substitute for high nickel titanium alloys, which are less expensive than titanium alloys.

 

 

ASME SA 240 UNS S31254 Plate Specifications

Specifications	ASTM A240 / ASME SA240
Thickness	0.4mm-50mm
Width	1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Length	2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, brush, etching, etc
Finish	Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)
Form	Coils, Foils, Rolls, Plain Sheets, Shim Sheets, Perforated Sheets, Chequered Plates, Strips, Flats, Blank (Circle), Ring (Flange), etc.

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ASTM A240 UNS S31254 Sheet Chemical Composition

Grade	Ni	Cr	Mo	Cu	N	C	Mn	Si	P	S
SMO 254	17.5-18.5	19.5-20.5	6-6.5	0.5-1.0	0.18-0.22	0.02	1.0	0.08	0.03	0.01

 

254 SMO Steel Plate Mechanical Properties Table

Density	Melting Point	Tensile Strength	Yield Strength (0.2%Offset)	Elongation
8.0 g/cm3	1320-1390 ℃	650	300	35 %

 

SS 6MO Plate Machinability:

Due to insufficient sulfur content, alloy 254 SMO has an extremely high work hardening rate and is difficult to machine. We manufacturers use overpowered machine tools, sharp tools, good lubrication, positive feeds and low speeds to provide good machining results.

 

ASTM A240 S31254 Sheet Heat Treatment:

Annealing should be done at 1149-1204°C followed by water quenching.

 

ASTM A240 SMO 254 Plate Applications:

• Food Processing Equipment
• Desalination of Seawater
• Brine Treatment
• Chemical Processing Equipment
• Paper and Pulp Industry Bleaching Equipment

 

Alloy 254 SMO EN 1.4547 Plate Thickness

Thickness (mm)	Dimensions
1.5	3m x 1.5m
2	3m x 1.5m
3	3m x 1.5m
5	3m x 1.5m / 4m x 2m
6	3m x 1.5m / 4m x 2m / 6m x 2m
8	3m x 1.5m / 4m x 2m / 6m x 2m
10	3m x 1.5m / 4m x 2m / 6m x 2m
12	3m x 1.5m / 4m x 2m / 6m x 2m
15	4m x 2m / 6m x 2m
20	4m x 2m / 6m x 2m

 

SS SMO 254 Plates Weights

Thickness	Plate Weight per Unit Area	Density
3/16 inches	0.06000 lbs/in²42.184176 kg/m²	0.315 lbs/in³8.72 g/cm³
1/4 inches	0.08 lbs/in²56.245568 kg/m²	0.315 lbs/in³8.72 g/cm³
3/8 inches	0.121 lbs/in²85.0714216 kg/m²	0.315 lbs/in³8.72 g/cm³
1/2 inches	0.161 lbs/in²113.1942056 kg/m²	0.315 lbs/in³8.72 g/cm³
5/8 inches	0.196 lbs/in²137.8016416 kg/m²	0.315 lbs/in³8.72 g/cm³
3/4 inches	0.235 lbs/in²165.221356 kg/m²	0.315 lbs/in³8.72 g/cm³
7/8 inches	0.274 lbs/in²192.6410704 kg/m²	0.315 lbs/in³8.72 g/cm³
1 inch	0.313 lbs/in²220.0607848 kg/m²	0.315 lbs/in³8.72 g/cm³

 

 

 

 

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