ASTM A312 254smo Tube

Name: ASTM A312 254smo S31254 Tube Manufacturers - Huitong Pipeline Equipment
Brand: Huitong
SKU: 266169565

1. Standard: ASTM A312 / ASME SA312、ASTM A213/ASME SA213、ASTM A269/ASME SA269
2. Size: 1/2”- 48”
3. Thickness: 0.5mm-30mm
4. Equivalent：UNS S31254, WNR.1.4547, AISI 254 SMO, F44

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Product Introduction

254SMO (UNS S31254) refers to a super austenitic stainless steel with high corrosion resistance as its core feature. It was originally designed to cope with extreme corrosive environments, such as high concentrations of chlorides, acidic media, and high temperature and high pressure conditions. 254SMO has demonstrated unique advantages in the fields of chemical industry, marine engineering, environmental protection, etc.

ASTM A312 254smo S31254 Tube Manufacturer,supplier

Zhengzhou Huitong Pipeline Equipment Co.,Ltd., a seasoned stockist and exporter with 15+ years in global supply, offers S31254 pipes, steel plates, forged bars, and industrial-grade fittings, flanges, and valves. Connect with us for free quotations and expert advice on material specifications-your sourcing partner awaits.

Duplex Stainless steel 254smo Pipe Application

Off-Shore Oil Drilling Companies
Power Generation
Gas Processing
Petrochemicals
Pharmaceutical Equipment
Specialty Chemicals
Chemical Equipment
Pharmaceuticals
Pulp & Paper Industry

Corrosion resistance of 254smo pipe

In environments containing chloride ions, such as seawater, chemical media, etc., which can effectively resist pitting, crevice corrosion and stress corrosion cracking. This feature is due to the synergistic effect of high molybdenum and nitrogen elements, which makes the pitting equivalent (PREN) of the material reach more than 43.

254 SMO Stainless Steel Tube Specifications

Standard Material	AISI, ASTM, JIS, GB, customers' need
Size of 254 SMO Tubing	Round Tube: Outside diameter: 16 to 119 millimeter or as per need
Thickness	0.25 millimeter to 3.0 millimeter
Length	6 millimeter / as per to your need
Tolerance	OD : ±0.2 millimeter
	Thk : ±0.05 millimeter
	Length of tube : ±0.5 millimeter
Ends	Bevelled ends / Plain end

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SS 1.4547 Material Equivalent

STANDARD	WERKSTOFF NR.	UNS	SIS	AFNOR	EN
SMO 254	1.4547	S31254	2378	Z1 CNDU 20.18.06Az	X1CrNiMoCuN20-18-7

Mechanical Properties of S31254 pipe

High strength (tensile strength ≥650 MPa, yield strength ≥300 MPa) and good toughness of 254SMO enable it to maintain stable performance under high temperature (up to 482℃) and high pressure environments.

Welding process of 254smo pipe

TIG welding (tungsten inert gas shielded welding) or laser welding is recommended, and the welding material needs to match the high molybdenum nickel composition. Heat input should be strictly controlled during welding to avoid precipitation of σ phase or χ phase in the weld area, which will lead to decreased corrosion resistance.

Cold forming of stainless steel s31254

Due to the significant tendency of material hardening, cold bending or expansion forming requires intermediate annealing process (annealing temperature 1100-1150℃) to restore material plasticity.

Surface treatment of Duplex 254smo

Pickling passivation (nitric acid + hydrofluoric acid mixture) can remove the processing oxide layer and enhance the passivation film, but it is necessary to control the acid concentration and time to prevent excessive corrosion.

Stainless steel 254smo Pipe Dimensional Tolerances

OD	OD Tolerance	Wall Tolerance
≤ .500″	± .005"	± 15%
.500″–.750″	± .005"	± 10%

Pressure Rating of UNS S31254 Pipe

254 SMO Pipe O.D. (in.)	Wall Thickness of 254 SMO Pipe (inches)
254 SMO Pipe O.D. (in.)	0.028	0.035	0.083	0.049	0.065	0.095	0.109	0.120
	Working Pressure (psig)
1/8	7900	10100
1/4	3700	4800		7000	9500
5/16		3700		5400	7300
3/8		3100		4400	6100
1/2		2300		3200	4400
3/4			4000	2200	3000	4600
1			2900		2200	3400	3900	4300