scholarly journals Recenzja: Ewa Bukowska-Marczak, „Przyjaciele, koledzy, wrogowie? Relacje pomiędzy polskimi, żydowskimi i ukraińskimi studentami Uniwersytetu Jana Kazimierza we Lwowie w okresie międzywojennym (1918–1939)”, Wydawnictwo Neriton, Warszawa 2019, ss. 304

2021 ◽  
Vol 2 (25) ◽  
pp. 165-170
Author(s):  
Tomasz Pudłocki
Keyword(s):  
Ss 304

ARMCO NITRONIC 50 STAINLESS STEEL

Alloy Digest ◽  
1990 ◽  
Vol 39 (4) ◽  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Treating ◽  
Temperature Performance ◽  
Price Range ◽  
Cold Worked ◽  
Ss 304

Abstract ARMCO NITRONIC 50 STAINLESS STEEL provides a combination of corrosion resistance and strength not found in any other commercial material available in its price range. It has good mechanical properties at both elevated and sub-zero temperatures. It does not become magnetic when cold worked. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as creep. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-304. Producer or source: Baltimore Specialty Steels Corporation. Originally published as Nitronic 50, January 1975, revised April 1990.

Experimental Investigations on Friction Welding of AL 6061 and SS 304

2010 ◽  
Vol 43 (2) ◽  
pp. 25
Author(s):  
Ishtiaq Ahmed Khan ◽  
Ravinder Reddy ◽  
ACS Kumar ◽  
Yatin Tambe
Keyword(s):  
Friction Welding ◽  
Experimental Investigations ◽  
Al 6061 ◽  
Ss 304

Mechanical properties assessment of TIG welded SS 304 joints

2021 ◽  
Author(s):  
Aishna Mahajan ◽  
Harvinder Singh ◽  
Satish Kumar ◽  
Santosh Kumar
Keyword(s):  
Mechanical Properties ◽  
Ss 304

Evaluation of High Temperature Properties and Microstructural Characterization of Resistance Spot Welded Steel Lap Shear Joints

2016 ◽  
Vol 35 (2) ◽  
pp. 145-151
Author(s):  
R. K. Gupta ◽  
V. Anil Kumar ◽  
Paul G. Panicker
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Joint Strength ◽  
Microstructural Characterization ◽  
Parent Metal ◽  
Resistance Spot ◽  
Lap Shear ◽  
Stainless Steel 304 ◽  
Ss 304 ◽  
Spot Welded

AbstractJoining of thin sheets (0.5 mm) of stainless steel 304 and 17-4PH through resistance spot welding is highly challenging especially when joint is used for high temperature applications. Various combinations of stainless steel sheets of thickness 0.5 mm are spot welded and tested at room temperature as well as at high temperatures (800 K, 1,000 K, 1,200 K). Parent metal as well as spot welded joints are tested and characterized. It is observed that joint strength of 17-4PH steel is highest and then dissimilar steel joint of 17-4PH with SS-304 is moderate and of SS-304 is lowest at all the temperatures. Joint strength of 17-4PH steel is found to be >80% of parent metal properties up to 1,000 K then drastic reduction in strength is noted at 1,200 K. Gradual reduction in strength of SS-304 joint with increase in temperature from 800 to 1,200 K is noted. At 1,200 K, joint strength of all combinations of joints is found to be nearly same. Microstructural evaluation of weld nugget after testing at different temperatures shows presence of tempered martensite in 17-4PH containing welds and homogenized structure in stainless steel 304 weld.

scholarly journals The effect of time variation on the steels corrosion rate in 0.5 M H2SO4 solution

2021 ◽  
Vol 1 (2) ◽  
pp. 49-55
Author(s):  
Afira Ainur Rosidah ◽  
Vuri Ayu Setyowati ◽  
Suheni Suheni ◽  
Rafly Rijayanto
Keyword(s):  
Corrosion Rate ◽  
Corrosion Behavior ◽  
Time Variation ◽  
H2so4 Solution ◽  
Steel Type ◽  
Wide Range ◽  
Aisi 4140 ◽  
Aisi 1045 ◽  
Ss 304 ◽  
Corrosion Time

Previous researches have carried out studying the corrosion behavior of steels, the most frequently used steels are medium carbon steel, alloy steel, and stainless steel. This is due to their wide range of applications. So, corrosion behavior is necessary to be analyzed for every steel type because of its wide function. This study was aimed to analyze the corrosion rate, macrostructure, and the XRD results of the AISI 1045, AISI 4140, and SS 304 which represent every steel type. Then, the steels were exposed to the 0.5M H2SO4 solution with various corrosion times. The variation of the corrosion time was 48, 96, and 144 hours. The results of this study revealed that AISI 1045 showed the highest corrosion rate with the value of 183.7 mpy at 144 hours of the time variation. All specimens obtained an increase in the corrosion rate with the increase in the corrosion time. Furthermore, for the macrostructure results, AISI 1045 and AISI 4140 gave obvious rust on the surface of the specimens for all time variation. The corrosion spots appear in the time variation of 96 and 144 hours for SS 304 specimens. XRD analysis confirmed the presence of metal oxides as corrosion products.

scholarly journals STUDI ALIRAN AIR PADA BALL VALVE DAN BUTTERFLY VALVE MENGGUNAKAN METODE SIMULASI COMPUTATIONAL FLUID DYNAMICS

2019 ◽  
Vol 4 (1) ◽  
pp. 38-49
Author(s):  
Rizky Arman ◽  
Yovial Mahyoedin ◽  
Kaidir Kaidir ◽  
Nando Desilpa
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Water Distribution ◽  
Fluid Pressure ◽  
Flow Simulation ◽  
Ball Valve ◽  
Material Strength ◽  
Butterfly Valve ◽  
Mechanical Devices ◽  
Ss 304

ABSTRAKValve adalah alat mekanis yang mengatur aliran atau tekanan cairan. Fungsinya adalah  menutup atau membuka aliran, mengontrol laju aliran, mengalihkan aliran, mencegah aliran balik, mengontrol tekanan, atau mengurangi tekanan. Masalah yang umumnya ditemui adalah  penutupan valve tidak sempurna dikarenakan adanya kotoran-kotoran yang menghalangi penutupnya untuk menutup secara sempurna. Penanganannya yang paling sederhana yaitu membersihkan dudukan dari kotoran-kotoran tadi secara intensif dan dilakukan pelumasan. Penelitian ini bertujuan untuk menjelaskan gambaran tentang simulasi aliran pada ball valve dan butterfly valve. Dan menjelaskan perbandingan tekanan, temperatur dan kecepatan distribusi air pada dua jenis valve. Tekanan fluida pada kondisi tertutup berbeda dengan kondisi terbuka. Hal ini akan berdampak terhadap kekuatan ball valve dan butterfly valve. Tekanan yang besar atau melebihi spesifikasi akan mempengaruhi mekanisme kerja dan kekuatan material. Pengaruh tekanan ini menjadi sangat penting dalam ball valve dan butterfly valve karena tekanan fluida dengan temperatur, pada  kondisi tertentu bisa di luar batas spesifikasi khususnya pada ball valve Sanitary SS316 Mounting Pad 3 inci dan butterfly valve Sanitary SS 304 3 inci. Metode yang digunakan adalah Computational Fluid Dynamics dengan bantuan Software Flow Simulasi Solidwork 2014.Kata Kunci: Ball and Butterfly Valve, Solidwork, Flow Simulasi, CFD, Tekanan, Temperatur, Kecepatan aliran. ABSTRACTValves are mechanical devices that regulate fluid flow or pressure. Its function can close or open the flow, control the flow rate, divert flow, prevent backflow, control pressure, or reduce pressure. The problem commonly encountered is that the valve closure is not perfect due to the impurities that prevent the cover from closing completely. The simplest handling is to clean the holder from the dirts earlier and do lubrication. This study aims to explain the description of the flow simulation on ball valve and butterfly valve. This study also explain the comparison of pressure, temperature and velocity of water distribution in two types of valve heads. Fluid pressure under closed conditions is different from opening conditions. This will affect the strength of the ball valve and butterfly valve as a valve. Pressure that is large or exceeds specifications will affect the working mechanism and material strength. The effect of this pressure becomes very important in the ball valve and butterfly valve because of  fluid pressure with temperature under certain conditions it can be out of the specification limits, especially in Sanitary SS316 Mounting Pad 3-inch ball valve and SS 304 3 inch Sanitary butterfly valve. This method was used in research is Computational Fluid Dynamics by utilizing of Flow Simulation Solidwork 2014 Software.Keywords: Ball Valve, Butterfly Valve, Solidwork 2014, Flow Simulation, CFD, Pressure, Temperature, Velocity

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