scholarly journals Development of chloride-free oil with sulfur-based EP additive for cold forming of stainless steel

2018 ◽  
Vol 5 (2) ◽  
pp. 17-00449-17-00449
Author(s):  
Tomohiro TAKAKI ◽  
Kazuhiko KITAMURA ◽  
Junichi SHIBATA
Keyword(s):  
Stainless Steel ◽  
Cold Forming ◽  
Ep Additive

ALLEGHENY LUDLUM TYPE 305

Alloy Digest ◽  
2002 ◽  
Vol 51 (1) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Physical Properties ◽  
Work Hardening ◽  
Deep Drawing ◽  
Heat Treating ◽  
Cold Forming ◽  
Temperature Performance ◽  
Low Rate

Abstract Allegheny Ludlum Type 305 (S30500) stainless steel is used for applications requiring a low rate of work hardening during severe cold-forming operations such as deep drawing. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as heat treating and joining. Filing Code: SS-840. Producer or source: Allegheny Ludlum Corporation.

ARMCO 18-9LW

Alloy Digest ◽  
1962 ◽  
Vol 11 (11) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Work Hardening ◽  
Heat Treating ◽  
Cold Forming

Abstract Armco 18-9LW is a low-work-hardening stainless steel developed for severe cold heading, swaging and other cold forming applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: SS-138. Producer or source: Armco Inc., Eastern Steel Division.

Stress Analysis of a Cryogenic Corrugated Pipe

2011 ◽  
Author(s):  
Vikas Srivastava ◽  
Jaime Buitrago ◽  
Scott T. Slocum
Keyword(s):  
Finite Element ◽  
Stainless Steel ◽  
Strain Hardening ◽  
Stress Responses ◽  
Full Scale ◽  
Main Body ◽  
Transfer System ◽  
Cold Forming ◽  
Steel Pipes ◽  
Local Stresses

One method to develop offshore gas reserves is to use a floating LNG plant (FLNG) on site and export the LNG via tankers. This alternative requires the use of a reliable LNG transfer system between the FLNG and the tanker under offshore conditions. One such system involves a flexible cryogenic hose whose main body is a pipe-in-pipe hose made of two concentric corrugated 316L stainless steel pipes (C-pipe) with flanged terminations. Thermal insulation is achieved by maintaining vacuum between the inner and outer corrugated stainless steel pipes. In addition, the hose assembly contains two outer layers of helical armor wires to sustain the axial load. Given the complexity and novelty of the transfer system, a finite element study was performed on the inner C-pipe — the critical fluid containment layer. The effects of strain hardening of corrugations due to cold forming and temperature were modeled. Finite element (FE) analyses of the C-pipe under axial, bending, and internal pressure loading were carried out to evaluate global load-deformation and local stress responses. Comparisons of full-scale tests at room and cryogenic temperatures to simulation predictions including the novel material model showed good agreement. However, fatigue life predictions for the C-pipe that were based on local stresses and sheet metal fatigue S-N curves did not agree with the full-scale fatigue test results. The results indicated that the spatial variation in strain hardening due to corrugation forming and biaxial local stresses during pipe deformation could play important roles in the fatigue response of the C-pipe.

NITRONIC 20

Alloy Digest ◽  
1981 ◽  
Vol 30 (2) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Mechanical Strength ◽  
Heat Treating ◽  
Hot Workability ◽  
Cold Forming ◽  
High Mechanical Strength ◽  
Ambient Temperatures ◽  
Temperature Performance ◽  
Resistance To Oxidation

Abstract Nitronic 20 was designed for elevated-temperature use where high mechanical strength and resistance to oxidation and sulfidation are important. This stainless steel exhibits high mechanical strength throughout the 1000-1700 F (538-927 C) temperature range, yet it is malleable at forging temperatures and provides excellent hot workability. Nitronic 20 also retains ductility and ambient temperatures; this permits working or shaping by many conventional cold-forming processes. This datasheet provides information on composition, physical properties, hardness, and tensile properties as well as fatigue. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and machining. Filing Code: SS-381. Producer or source: Armco Inc., Stainless Steel Division.

Effect of Cold Forming on Low-Temperature Plasma Nitriding and Carburizing Characteristics of Austenitic Stainless Steel

2009 ◽  
Vol 6 (S1) ◽  
pp. S893-S896 ◽  
Author(s):  
Motoo Egawa ◽  
Yasushi Matsuda ◽  
Nobuhiro Ueda ◽  
Takumi Sone ◽  
Masato Tsujikawa ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Low Temperature ◽  
Plasma Nitriding ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Cold Forming

Failure Analysis of Corrugated Hoses

2017 ◽  
Vol 270 ◽  
pp. 68-73
Author(s):  
Lenka Klakurková ◽  
Miroslava Horynová ◽  
Martin Juliš ◽  
Pavel Gejdoš ◽  
Lucie Páleníková ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Stainless Steel ◽  
Service Life ◽  
Aisi 316L ◽  
Cooling Systems ◽  
Cold Forming ◽  
Water Gas ◽  
Scanning Electron

Stainless steel corrugated hoses are widely used in many areas of industry. They are used in application such as distribution of drinking and supply water, gas and also various working fluids, for example in cooling systems. During the assembly of AISI 316L corrugated hoses for cooling systems defects form due to deformation of the hoses during assembly. The absolute tightness of such systems is required and any defects of the hoses are therefore undesirable. This study deals with evaluation of most common defects of corrugated hoses via light and scanning electron microscopy and proposes measures to minimize such defects. It was revealed, that defects form due to deformation of the hoses during assembly or, in case of unfavorable microstructure, during the service life. In later case, failure of the hose was caused by higher content of deformation-induced martensite in microstructure as a result of intense cold forming. Component with such microstructure exhibited less favorable mechanical properties and hoses were more prone to the failure.

scholarly journals The influence of microstructure deformation on the corrosion resistance of cold formed stainless steel

2018 ◽  
Vol 190 ◽  
pp. 04002 ◽  
Author(s):  
Ingmar Bösing ◽  
Marius Herrmann ◽  
Ilya Bobrov ◽  
Jorg Thöming ◽  
Bernd Kuhfuss ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Electrochemical Properties ◽  
Corrosion Behavior ◽  
Behavior Changes ◽  
Forming Process ◽  
Cold Forming ◽  
Feed Velocity ◽  
Rotary Swaging ◽  
Micro Parts

Rotary swaging is an incremental cold forming process to produce axisymmetric workpieces from rods and tubes. The process also induces changes of the microstructure of the material depending on the process parameters. This in turn influences the mechanical properties like hardness as well as the electrochemical properties. As a result of changed electrochemical properties, the passivity of the material and thus the corrosion behavior changes. In order to investigate the influence of rotary swaging on the corrosion behavior of the stainless steel AISI304, deformed micro parts are electrochemically analyzed. The measurements reveal a dependency of corrosion rate and impedance on both feed velocity and final diameter of the rotary swaging process. A higher feed velocity decreases the corrosion rate and increases the impedance indicating a better resistance against corrosion as a side effect of rotary swaging.

Investigations on cold-forming effect of cold-drawn duplex stainless steel tubular sections

2019 ◽  
Vol 152 ◽  
pp. 81-93 ◽  
Author(s):  
Jiachang Wang ◽  
Ganping Shu ◽  
Baofeng Zheng ◽  
Qinlin Jiang
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Cold Forming ◽  
Tubular Sections

CARPENTER STAINLESS 18-18 PLUS

Alloy Digest ◽  
1977 ◽  
Vol 26 (10) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Heat Treating ◽  
304 Stainless Steel ◽  
High Temperature Strength ◽  
Cold Forming ◽  
Aisi Type ◽  
Type 304 ◽  
Type 304 Stainless Steel

Abstract CARPENTER STAINLESS 18-18 PLUS is an 18 chromium-18 manganese austenitic stainless steel which provides twice the yield strength of AISI Type 304 stainless steel and corrosion resistance similar to AISI Type 316 in some media. It has excellent ductility and toughness and good high-temperature strength. Although Carpenter 18-18 Plus contains no nickel, it is nonmagnetic both in the annealed condition and after severe cold forming. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SS-344. Producer or source: Carpenter.

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