DIN934 254smo 1.4547 Uns S31254 Hex Nut

• Customization: Available
• Material: Stainless Steel
• Type: Hexagon Head
• Model NO.: DIN934 ISO 4032
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN, ANSI, ISO
• Grade: 254smo 1.4547 Uns S31254
• Price for The Size: M16 of DIN934
• Marking: ID+Grade
• Packing: Small Box
• Certificated: En10204 --3.1b
• Transport Package: Bulk in CTN. Then in Pallet
• Specification: DIN934
• Trademark: HT
• Origin: Jiangsu, China
• HS Code: 731816000
• Production Capacity: 10ton/Month

Product Description

Professional fasteners supplier!
Hastelloy,Monel,Inconel,Incoloy,duplex fasteners!
1.4547 254SMO bolt & nut & washer with marking

Our Advantages

We are leader supplier of 254SMo hex nut / 1.4547 nut /UNS S31254 nut 
We have rich project management experience

Trustworthy supplier--We use real material always!
Good price--We sell in competitive price always!
Delivery time--We can complete urgent order in 4 weeks always!
Good Service--Our professional sales have more than 15 years rich experience ,who masters in technics,mechanical properties,exporting policy,controling shipping cost!

Rich Project experience

Our Hastelloy  C276 nuts are used in South Korea power plant on 2010!

Our Alloy 286 1.4980 &2.4952 Nimonic 80A nuts used in Netherlands GE Nuclear Power plant project on 2012!

Our SS321 & SS309S studs and nut are used in Vietnam Powerplant project on 2015!

Our Hastelloy  C276 nuts are used in India Energy Group power plant in 2023&2024&2025!

Our duper duplex fasteners are used in Oman Power plant on 2010&2016&2024!

Our duper duplex fasteners are used in Mexico Power plant's cooling tower on 2024!

Our Hastelloy C276,C4,C22,G30,B3
Incoloy800/825/925/926
Inconel600/617/718/725
Monel400/k500
254SMO Stud , Bolt ,Nut and washer are exported to Western Europe every Month!

Product Parameters

Whats is 254SMo material?
Designated as UNS S31254 or DIN W.Nr. 1.4547, 254SMO is an Cr-Ni-Mo alloyed super austenitic stainless steel with deliberate additions of copper and nitrogen content. With high levels of chromium, molybdenum, and nitrogen, 254SMO is especially suited for high-chloride environments and offers chloride resistance superior to Alloy 904L, SS316L, Alloy 20 and Alloy 825. It can be readily welded to other common austenitic stainless steels. The 254 SMO stainless steel provides outstanding resistance to pitting corrosion, crevice corrosion, as well as stress-corrosion cracking. It is widely used in seawater handling & desalination equipment, pulp and paper industry, oil refinery plant, chemical processing equipment, and food processing equipment, etc.

Examples of applications :
• Petroleum production
• Saltwater handling
• Pulp mill bleach systems
• Tall oil distillation columns
• Desalination equipment
• Food and chemical processing equipment
 • Flue gas desulphurization scrubbers
 • Offshore oil & gas production equipment

254SMO
 

UNS	AISI/ASTM	ID	W.Nr
S31254	254SMo	F44	1.4547

 
 
254SMO Chemical composition:
 

Alloy	%	Ni	Cr	Mo	Cu	N	C	Mn	Si	P	S
254SMO	Min.	17.5	19.5	6	0.5	0.18
	Max.	18.5	20.5	6.5	1	0.22	0.02	1	0.8	0.03	0.01

 

254SMO Physical properties :
 

Density	8.0 g/cm3
Melting point	1320-1390 ºC

 

254SMO minimum mechanical properties in the room temperature:
 

Status	Tensile strength Rm N Rm N/mm2	Yield strength RP0.2N/mm2	Elongation A5 %
254 SMO	650	300	35

 
 
Characteristic:
The high concentration of molybdenum,chromium and nitrogen made 254SMO has very good resistance to pitting and crevice corrosion performance. Copper improved corrosion resistance in some of the acid . In addition, due to its high content of nickel,chromium and molybdenum, so that 254SMO have a good stress strength corrosion cracking performance.
1.A lot of a wide range use of experience has shown that even iin higher temperatures, 254SMO in the sea water is also highly resistant to corrosion performance gap, only a few types of stainless steel with this performance.
2.254SMO such as bleach paper required for the production of acidic solution and the solution halide oxidative corrosion resistance and corrosion resistance can be compared to the most resilient in the base alloy of nickel and titanium alloys.
3.254SMO due to a high nitrogen content, so its mechanical strength than other types of austenitic stainless steel is higher. In addition, 254SMO also highly scalable and impact strength and good weldability.
4.254SMO with high molybdenum content can make it higher rate of oxidation in the annealing , which after the acid cleaning with rough surface than normal stainless steel is more common than the rough surface. However,has not adversely affected for the corrosion resistance of this steel .
 
Metallurgical structure
254SMO is face-centered cubic lattice structure. In order to obtain austenitic structure, 254SMO general annealing in the 1150-1200ºC.In some cases, the material maybe with the traces of metal middle phase (χ phase and α-phase). However,their impact strength and corrosion resistance are not adversely affected in normal circumstances. When placed in the range of 600-1000ºC, they may phase in the grain boundary precipitation.
 
Corrosion resistance
254SMO with very low carbon content, which means that the danger by the heating caused of carbide precipitation is very small. Even in the 600-1000ºC after one hour sensitization still able to Strauss through the intergranular corrosion test (Strauss Test ASTMA262 order E).However, because of the high-alloy steel content. In the above-mentioned temperature range intermetallic phase with the possibility of metal in the grain boundary precipitation. These sediments do not make it occur intergranular corrosion in the corrosive media applications, then,welding can be carried out without intergranular corrosion.But in the heat of concentrated nitric acid, these sediments may be caused intergranular corrosion in heat-affected zone. If ordinary stainless steel in the solution that containing chloride, bromide or iodide,it will show pitting, crevice corrosion or stress corrosion cracking form by localized corrosion. However, in some cases,the existence of halide will speed up the uniform corrosion. Particularly in the non-oxidizing acid. In pure sulfuric acid, 254SMO with a much greater corrosion resistance than 316(common stainless steel),but with abated corrosion resistance compared to 904L (NO8904) stainless steel in high concentrations. In the sulfuric acid containing chloride ions , 254SMO with the largest corrosion resistance ability.The 316 can not be used for stainless steel in hydrochloric acid since it may occur localized corrosion and uniform corrosion, but 254SMO can be used in diluted hydrochloric acid in general temperatures,uder the border region do not need to worry about corrosion occurred. However, we must try to avoid the gap cracks. In the fluoride silicate (H2SiF4) and hydrofluoric acid (HF), the corrosion resistance of ordinary stainless steel is very limited, and 254SMO can be used in a very wide temperature and concentration.
 
Applied field:254SMO is a mult-purpose material can be used in many industrial applications:
1. Petroleum, petrochemical equipment, petro-chemical equipment, such as the bellows. 
2. Pulp and paper bleaching equipment, such as pulp cooking, bleaching, washing filters used in the barrel and cylinder pressure rollers, and so on. 
3. Power plant flue gas desulphurization equipment, the use of the main parts: the absorption tower, flue and stopping plate, internal part,spray system. 
4. At sea or sea water processing system, such as power plants using sea water to cool the thin-walled Condenser, desalination of sea water processing equipment,can be applied even though the water may not flow in the device.
5. Desalination industries, such as salt or desalination equipment. 
6. Heat exchanger, in particular in the working environment of chloride ion.