What is ASTM A312 S31254 Stainless Steel Pipe?

What is ASTM A312 S31254 Stainless Steel Pipe?
Stainless Steel 254SMO ASTM A312 UNS S31254 Seamless Heavily Cold Worked Pipes are one such pipe that is considered as a high austenitic grade. It has a strength that is 3 times the stainless steel 300 series. SMO254 pipe efficiently resists pitting, crevice corrosion and chloride stress corrosion cracking. 254 SMO Tubing is well known for high ductility and good impact strength. It is also known as moly 6 due to the addition of molybdenum in trace amounts. 254 SMO Pipe Suppliers recommend these pipes due to their ability to work under high temperatures and maintain high strength even under volatile conditions.

 

Material Specification of 254 SMO Tubing

SMO 254 Seamless Pipes Specifications
Specifications	ASTM A 409 ASME SA 409 / ASTM A 312 ASME SA 312 / ASTM A 358 ASME SA 358
Dimensions	ASTM, ASME and API
Size	3/4″ – 12″
Specialized in	Large Diameter Size
Thickness	20 Swg., 18 Swg., 16 Swg., 14 Swg., 12 Swg., 10 Swg., & Sch. 10, Sch. 40, Sch. 80 etc.
Type	Seamless / ERW / Welded / Fabricated
Form	Round, Hydraulic Etc
Length	Single Random, Double Random & Cut Length.
End	Plain End, Beveled End, Treaded

 

Composition Standard of ASTM A213 6mo Tubing

SMO 254	C	Ni	Cr	Mn	Mo	Fe	Si	S	Cu	P
	0.002 maximum	17.05 to 18.05	19.05 to 20.05	1 maximum	6 to 6.05	to	0.08 maximum	0.001 maximum	0.05 to 1	0.003 maximum

 

Minimum Yield Strength Chart of 254 SMO Tube

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

 

 

Alloy 254 Seamless Tube Bending
254 SMO Seamless Tube is routinely bowed on common tube bending gear. Mandrel benders are proposed particularly for tight bends. bends made without a mandrel require greater radii. If more humble span bends are required, it may be critical to twist the tubing at 400°-600°F (204°-316°C). 

 

254 smo stainless steel vs 316：Chemical composition

254 SMO stainless steel has 6% molybdenum content,316 stainless steel, also known as UNS S31600 marine grade stainless steel, has 2-3% molybdenum content.

 

Factory 254 Smo Tubing Material Testing:
We ensure that all our materials go through strict quality tests before dispatching them to our clients.
• Mechanical Testing Such as Tensile of Area
• Hardness Test
• Chemical Analysis – Spectro Analysis
• Positive Material Identification – PMI Testing
• Flattening Test
• Micro and MacroTest
• Pitting Resistance Test
• Flaring Test
• Intergranular Corrosion (IGC) Test

 

1.4547 SMO 254 Pipes Packaging
SMO 254 Pipe may be furnished bare or coated and with capped ends.
Pipes up to 3" OD will be supplied in bundles. In order to prevent rust during sea shipment, bundles of SMO 254 Pipe may be wrapped with polypropylene sheets, and secured with flat steel bands.
Over 3" OD will be supplied loose.

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