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254SMO PREMIUM ALLOY SEAMLESS PIPE A312 UNS S31254 DUPLEX STEEL

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254SMO PREMIUM ALLOY SEAMLESS PIPE A312 UNS S31254 DUPLEX STEEL

Country/Region	china
City & Province	ningbo zhejiang
Categories	Metal Casting Machinery

Product Details

254SMO PREMIUM ALLOY SEAMLESS PIPE A312 UNS S31254 DUPLEX STEEL

Overview

254SMo stainless steel has excellent acid, alkali, seawater, and chloride corrosion resistance, especially in high chloride and acidic environments. Its corrosion resistance is even more outstanding.

High strength and toughness: Due to its high molybdenum, nitrogen, chromium, and low-carbon chemical composition, 254SMo stainless steel has good resistance to stress corrosion cracking, durability, and toughness, and can also work at high temperatures and pressures.

Good wear resistance and corrosion cracking resistance: Due to its special chemical composition, 254SMo stainless steel has good wear resistance and corrosion cracking resistance, and can maintain high performance in harsh working environments.

Large size seamless steel pipe: Compared with other steels, 254SMo stainless steel has certain processing properties, can produce large size seamless steel pipes, and has excellent spanwise welding performance.

254 SMO Properties:

Excellent resistance to pitting and crevice corrosion, PRE = ≥42.5%
High resistance to general corrosion
High resistance to stress corrosion cracking
Higher strength than conventional austenitic stainless steels
Good weldability

Heat Treatment

The tubes are delivered in heat treated condition. If additional heat treatment is needed due to further processing the following is recommended.Solution annealing 1150–1200°C (2100–2190°F), quenching in water. Thin-walled tubes min. 1130°C (2060°F), quenching in air/water.

254SMO Equivalent Grades

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

254SMO Mechanical Properties


Wall thickness	Proof strength		Tensile strength	Elong.		Hardness
mm	Rp0.2a)	Rp1.0a)	Rm	Ab)	A2"	HRB
mm	MPa	MPa	MPa	%	%
<5	≥310	≥340	675-850	≥35	≥35	≤96
>5	≥310	≥340	655-850	≥35	≥35	≤96

**254SMO Chemical composition**
C	Si	Mn	P	S	Cr	Ni	Mo	N	Cu
≤0.020	≤0.80	≤1.00	≤0.030	≤0.010	20	18	6.1	0.20	0.7

254 SMO Applications:

Ocean: Marine structures in the marine environment, desalination, aquaculture, seawater heat exchange
Environmental protection fields: flue gas desulfurization devices for thermal power generation, wastewater treatment
Energy fields: atomic power generation, comprehensive utilization of coal, ocean tide power generation, etc.
Petrochemical industry: oil refining, chemical equipment and other food industries: salt making, soy sauce brewing, etc.
High concentration chloride ion environment: papermaking industry, various bleaching devices