Unit-Iii Part a 1
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(12) Patent Application Publication (10) Pub. No.: US 2013/0062568 A1 Miralles (43) Pub
US 2013 OO62568A1 (19) United States (12) Patent Application Publication (10) Pub. No.: US 2013/0062568 A1 Miralles (43) Pub. Date: Mar. 14, 2013 (54) ACID CLEANING AND CORROSION Publication Classification INHIBITING COMPOSITIONS COMPRISING GLUCONCACD (51) Int. Cl. C09K 5/6 (2006.01) (71) Applicant: Ecolab USA Inc., St. Paul, MN (US) (52) U.S. Cl. CPC ...................................... C09K 15/16 (2013.01) (72) Inventor: Altony Miralles, Woodbury, MN (US) USPC .......................................................... 252/392 (73) Assignee: ECOLAB USA INC., St. Paul, MN (US) (57) ABSTRACT (21) Appl. No.: 13/674,539 A biodegradable acid cleaning composition for cleaning stainless steel, and other Surfaces is disclosed. The composi (22) Filed: Nov. 12, 2012 tion comprises urea sulfate in combination with gluconic acid which serves as a corrosion inhibitor. The composition retains Related U.S. Application Data the cleaning and corrosion prevention properties of similar (60) Continuation of application No. 13/344.982, filed on phosphoric acid solutions but is safe for the environment and Jan. 6, 2012, which is a continuation of application No. is less expensive to produce. Applicants have surprisingly 12/887,660, filed on Sep. 22, 2010, now abandoned, found that the traditionally alkaline corrosion inhibitor, glu which is a division of application No. 127751,674, filed conic acid, can work effectively in an acidic cleaning com on Mar. 31, 2010, now Pat. No. 7,828,908. position. US 2013/0062568 A1 Mar. 14, 2013 ACID CLEANING AND CORROSION also are used to improve corrosion resistance and enhance INHIBITING COMPOSITIONS COMPRISING brightness of the base metal surface. GLUCONCACD 0008. One of the problems which arises in the use of steel is its corrosion, either by the atmosphere or by the environ CROSS-REFERENCE TO RELATED ment in which it is used. -
48-51 Characterization Martensitic Stainless Steel Surgica.Pdf
CHARACTERIZATION OF LOCALLY PRODUCED MARTENSITIC STAINLESS STEEL SURGICAL GRADE AISI 420A By Muhammad Kamran, Faraz Hussain, Taqi Zahid Butt, Fahad Riaz* Abstract The Martensitic stainless steel surgical grade AISI 420A is one of the major alloys being used in the production of surgical instruments in Pakistan. Till today, this alloy is being imported from Japan and France. Recently this grade has been developed in Pakistan. In this study this locally produced Martensitic stainless steel surgical grade AISI 420A was investigated. The sheet samples were tested for their composition, heat treated by austenizing at 1000 + 20°C, 0 quenched in N2 gas followed by tempering at 200 C and finally tested for their mechanical properties. It was observed that chemical composition fall within the standard composition with minor changes. It was also observed that hardness and tensile properties are within range. Introduction Pakistan is one of the largest countries producing and supplying surgical instruments all over the world. Tonnages of raw material are required for the production purposes. Surgical industry of Pakistan holds a history of more than 100 years, when some British doctors got their surgical instruments repaired from the skilled workers of Sialkot and that was the foundation of Sialkot surgical industry. [1] Surgical Instruments Manufacturers Association of Pakistan (SIMAP) was established during 1958 with an aim to help solving the problems of surgical community. Surgical association has more than 2300 members till date, who are grossly engaged in manufacturing of surgical instruments to meet their export commitments in the International Market. The value of exports of surgical instruments for the financial year 2007-2008 was US $255 Million. -
A New Maraging Stainless Steel with Excellent Strength–Toughness–Corrosion Synergy
materials Article A New Maraging Stainless Steel with Excellent Strength–Toughness–Corrosion Synergy Jialong Tian 1,2, Wei Wang 2,*, M. Babar Shahzad 2, Wei Yan 2, Yiyin Shan 2, Zhouhua Jiang 3 and Ke Yang 2 1 School of Materials Science and Engineering, Northeastern University, Shenyang 110004, China; [email protected] 2 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China; [email protected] (M.B.S.); [email protected] (W.Y.); [email protected] (Y.S.); [email protected] (K.Y.) 3 School of Metallurgy, Northeastern University, Shenyang 110004, China; [email protected] * Correspondence: [email protected]; Tel.: +86-24-8397-8745 Received: 17 October 2017; Accepted: 8 November 2017; Published: 10 November 2017 Abstract: A new maraging stainless steel with superior strength–toughness–corrosion synergy has been developed based on an innovative concept of alloy design. The high strength–toughness combination is achieved by forming dispersive nano-sized intermetallic compounds in the soft lath martensitic matrix with a slight amount of residual austenite. The good corrosion resistance is guaranteed by exactly controlling the Co content based on understanding the synergistic effect between Co and Cr. The fine structure characteristics of two dominant strengthening precipitations including Ni3Ti and Mo-rich phases were finely characterized associated with transmission electron microscope (TEM) and atom probe tomography (APT) analyses. The relationship among microstructure, strength and toughness is discussed. The precipitation mechanism of different precipitates in the new maraging stainless steel is revealed based on the APT analysis. Keywords: maraging stainless steel; alloy design; strength and toughness; corrosion resistance; atomic probe tomography; precipitation mechanism 1. -
Fire Apparatus Specifications
CLARE FIRE DEPARTMENT FIRE APPARATUS SPECIFICATIONS CUSTOM PUMPER 1 CLARE FIRE DEPARTMENT Y___N___ INTENT OF SPECIFICATIONS It is the intent of these specifications to cover the furnishing and delivery to the Clare Fire Department of a complete fire apparatus equipped as hereinafter specified. With the view of obtaining the best results and the most acceptable apparatus for service, these specifications cover only the general requirements as to the type of construction and tests to which the apparatus must conform, together with certain details to furnish equipment and appliances with which the successful bidder must conform. Minor details of construction and materials, where not otherwise specified, are left to the discretion of the contractor who shall be solely responsible for the design and construction of all features. The NATIONAL FIRE PROTECTION ASSOCIATION pamphlet #1901 current edition for Motor Vehicle Apparatus, unless otherwise specified in these specifications shall prevail. ONLY THE SPECIFIED FIREFIGHTING SUPPORT EQUIPMENT LISTED IN THESE SPECIFICATIONS SHALL BE PROVIDED. The apparatus shall conform to all Federal motor vehicle safety standards. Bids will only be considered from companies that have an established reputation in the field of fire and/or rescue apparatus manufacturing. Each bid must be accompanied by a set of detailed contractors specifications consisting of a detailed description of the apparatus and equipment proposed. These specifications shall include size, location, type, and model of all component parts being furnished. Detailed information shall be provided on the materials used to construct all facets of the apparatus body. Any bidder who fails to submit detailed construction specifications shall be considered non-responsive and shall render their proposal ineligible for award. -
Improvement in Mechanical Properties of C300 Maraging Steel by Application of VAR Process
ARTICLE IN PRESS Vacuum 82 (2008) 521–528 www.elsevier.com/locate/vacuum Improvement in mechanical properties of C300 maraging steel by application of VAR process Seyed Reza Elmi HoseiniÃ, Hosein Arabi, Hekmat Razavizadeh Department of Metallurgy and Materials Engineering, Iran University of Science and Technology, Narmak, Tehran, Iran Received 22 November 2006; received in revised form 1 August 2007; accepted 11 August 2007 Abstract The prime objective of this research was to improve the mechanical properties of C300 maraging steels originally cast in the vaccum induction melting (VIM) and AIM furnaces by application of vaccum arc remelting (VAR) process. For this purpose two sets of C300 maraging steel with different amounts of Ti were cast in two different types of furnaces. Three bars with 1, 1.5 and 2 wt% of Ti were produced in the argon induction melting (AIM) furnace and two bars with 0.65 and 1 wt% Ti in the VIM furnace. Then all of the bars were subjected to VAR process in order to study the effects of this process on the reduction of N and O gases and inclusions, hence improvement in the mechanical properties. The results show that the total reduction of N and O gases in the bars cast in the AIM furnace was up to 40%, the amounts of inclusions irrespective of their kind reduced up to 30% while ductility and impact energy increased up to 40%. However, these parameters in the bars cast in the VIM furnace changed as follows: total gas reduction decreased by 12%, ductility and impact energy increased by 30% and 47%, respectively. -
Structure/Property Relationships in Irons and Steels Bruce L
Copyright © 1998 ASM International® Metals Handbook Desk Edition, Second Edition All rights reserved. J.R. Davis, Editor, p 153-173 www.asminternational.org Structure/Property Relationships in Irons and Steels Bruce L. Bramfitt, Homer Research Laboratories, Bethlehem Steel Corporation Basis of Material Selection ............................................... 153 Role of Microstructure .................................................. 155 Ferrite ............................................................. 156 Pearlite ............................................................ 158 Ferrite-Pearl ite ....................................................... 160 Bainite ............................................................ 162 Martensite .................................... ...................... 164 Austenite ........................................................... 169 Ferrite-Cementite ..................................................... 170 Ferrite-Martensite .................................................... 171 Ferrite-Austenite ..................................................... 171 Graphite ........................................................... 172 Cementite .......................................................... 172 This Section was adapted from Materials 5election and Design, Volume 20, ASM Handbook, 1997, pages 357-382. Additional information can also be found in the Sections on cast irons and steels which immediately follow in this Handbook and by consulting the index. THE PROPERTIES of irons and steels -
Regulations and Standards for Clean Trucks and Buses on the Right Track?
CPB Corporate Partnership Board Regulations and Standards for Clean Trucks and Buses On the Right Track? Decarbonising Transport Regulations and Standards for Clean Trucks and Buses On the Right Track? Decarbonising Transport The International Transport Forum The International Transport Forum is an intergovernmental organisation with 62 member countries. It acts as a think tank for transport policy and organises the Annual Summit of transport ministers. ITF is the only global body that covers all transport modes. The ITF is politically autonomous and administratively integrated with the OECD. The ITF works for transport policies that improve peoples’ lives. Our mission is to foster a deeper understanding of the role of transport in economic growth, environmental sustainability and social inclusion and to raise the public profile of transport policy. The ITF organises global dialogue for better transport. We act as a platform for discussion and pre- negotiation of policy issues across all transport modes. We analyse trends, share knowledge and promote exchange among transport decision-makers and civil society. The ITF’s Annual Summit is the world’s largest gathering of transport ministers and the leading global platform for dialogue on transport policy. The Members of the Forum are: Albania, Armenia, Argentina, Australia, Austria, Azerbaijan, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Canada, Chile, China (People’s Republic of), Croatia, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, India, Ireland, Israel, Italy, Japan, Kazakhstan, Korea, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Mexico, Republic of Moldova, Mongolia, Montenegro, Morocco, the Netherlands, New Zealand, North Macedonia, Norway, Poland, Portugal, Romania, Russian Federation, Serbia, Slovak Republic, Slovenia, Spain, Sweden, Switzerland, Tunisia, Turkey, Ukraine, the United Arab Emirates, the United Kingdom, the United States and Uzbekistan. -
Materials Technology – Placement
MATERIAL TECHNOLOGY 01. An eutectoid steel consists of A. Wholly pearlite B. Pearlite and ferrite C. Wholly austenite D. Pearlite and cementite ANSWER: A 02. Iron-carbon alloys containing 1.7 to 4.3% carbon are known as A. Eutectic cast irons B. Hypo-eutectic cast irons C. Hyper-eutectic cast irons D. Eutectoid cast irons ANSWER: B 03. The hardness of steel increases if it contains A. Pearlite B. Ferrite C. Cementite D. Martensite ANSWER: C 04. Pearlite is a combination of A. Ferrite and cementite B. Ferrite and austenite C. Ferrite and iron graphite D. Pearlite and ferrite ANSWER: A 05. Austenite is a combination of A. Ferrite and cementite B. Cementite and gamma iron C. Ferrite and austenite D. Pearlite and ferrite ANSWER: B 06. Maximum percentage of carbon in ferrite is A. 0.025% B. 0.06% C. 0.1% D. 0.25% ANSWER: A 07. Maximum percentage of carbon in austenite is A. 0.025% B. 0.8% 1 C. 1.25% D. 1.7% ANSWER: D 08. Pure iron is the structure of A. Ferrite B. Pearlite C. Austenite D. Ferrite and pearlite ANSWER: A 09. Austenite phase in Iron-Carbon equilibrium diagram _______ A. Is face centered cubic structure B. Has magnetic phase C. Exists below 727o C D. Has body centered cubic structure ANSWER: A 10. What is the crystal structure of Alpha-ferrite? A. Body centered cubic structure B. Face centered cubic structure C. Orthorhombic crystal structure D. Tetragonal crystal structure ANSWER: A 11. In Iron-Carbon equilibrium diagram, at which temperature cementite changes fromferromagnetic to paramagnetic character? A. -
Surface Vehicle Standard
REV. SURFACE JUN2006 ® J20 VEHICLE Issued 1944-01 STANDARD Revised 2006-06 Superseding J20 MAY2004 Coolant System Hoses 1. Scope This SAE Standard covers reinforced and flexible hoses intended for use in water and ethylene glycol-based engine-coolant system applications. 1.1 Rationale Shelf life was added at the request of the USA department of Defense. 2. References 2.1 Applicable Publications The following publications form a part of the specification to the extent specified herein. Unless otherwise indicated, the latest revision of SAE publications shall apply. 2.1.1 SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J1231—Formed Tube Ends for Hose Connections and Hose Fittings SAE J1508—Hose Clamp Specification SAE J1610—Test Method for Evaluating the Sealing Capability of Hose Connections with a PVT Test Facility SAE J1638—Compression Set of Hoses or Solid Discs SAE J1684—Test Method for Evaluating the Electrochemical Resistance of Coolant System Hoses and Materials SAE J2370—Geometric Dimensions and Tolerancing for Curved Hose SAE J2387—Dimensions and Tolerances for Coolant System Hoses SAE J2605—Non-Contact Hose Measurement Study 1 SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefrom, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. -
High Performance Steel for Percussive Drilling
TVE-K 17001 Examensarbete 15 hp 2 Juni 2017 High Performance Steel for Percussive Drilling Elin Åkerlund Jakob Jonsson Åberg Patrik Österberg Rebecka Havo Mikael Fredriksson Abstract High Performance Steel for Percussive Drilling Elin Åkerlund, Jakob Jonsson Åberg, Patrik Österberg, Rebecka Havo and Mikael Fredriksson Teknisk- naturvetenskaplig fakultet UTH-enheten Atlas Copco Secoroc AB are searching after new bulk materials for drill heads that are used in percussive drilling in order to improve their strength and durability. The Besöksadress: aim of this project is to assist Atlas Copco in this search and provide them with Ångströmlaboratoriet Lägerhyddsvägen 1 further information regarding material properties, alloying elements, suppliers, etc. Hus 4, Plan 0 A literary study was carried out in order to identify materials that had UTS and KIC Postadress: more than or equal to 1700 MPa and 70 MPa*m^1/2, respectively. Materials that Box 536 751 21 Uppsala fulfilled these criteria were T250 grade maraging steel, Cobalt free maraging steel, High cobalt maraging steel, 300 grade maraging steel, AerMet 100, AF1410, S53, Telefon: M54, 300M, 4340M and PremoMet. These were categorized into maraging steels, 018 – 471 30 03 high alloy secondary hardened steels, and low alloy steels, and were then further Telefax: researched. 018 – 471 30 00 The material with the highest combination of UTS and KIC was M54 followed by Hemsida: AerMet 100; while AF1410 had the highest KIC but a low UTS, and PremoMet had http://www.teknat.uu.se/student the highest UTS but a low KIC. Maraging steels and HASH steels have a similar price range, while low alloy steels are much cheaper. -
A Review of Factors Affecting the Mechanical Properties of Maraging
metals Review AReview Review of Factors Affecting the Mechanical PropertiesA Review ofof MaragingFactors Affecting Steel 300 the Fabricated Mechanical via Laser PowderProperties Bed of Fusion Maraging Steel 300 Fabricated via Laser Powder Bed Fusion Barry Mooney and Kyriakos I. Kourousis * Barry Mooney and Kyriakos I. Kourousis * School of Engineering, University of Limerick, V94 T9PX Limerick, Ireland * SchoolCorrespondence: of Engineering, [email protected]; University of Limerick, Tel.: V94+353-61202217 T9PX Limerick, Ireland * Correspondence: [email protected]; Tel.: +353-61202217 Received: 29 August 2020; Accepted: 20 September 2020; Published: 22 September 2020 Received: 29 August 2020; Accepted: 20 September 2020; Published: 22 September 2020 Abstract: Maraging steel is an engineering alloy which has been widely employed in metal additive Abstract: Maraging steel is an engineering alloy which has been widely employed in metal additive manufacturing. This paper examines manufacturing and post-processing factors affecting the manufacturing. This paper examines manufacturing and post-processing factors affecting the properties of maraging steel fabricated via laser powder bed fusion (L-PBF). It covers the review of properties of maraging steel fabricated via laser powder bed fusion (L-PBF). It covers the review of published research findings on how powder quality feedstock, processing parameters, laser scan published research findings on how powder quality feedstock, processing parameters, laser scan strategy, build orientation and heat treatment can influence the microstructure, density and porosity, strategy, build orientation and heat treatment can influence the microstructure, density and defects and residual stresses developed on L-PBF maraging steel, with a focus on the maraging steel porosity, defects and residual stresses developed on L-PBF maraging steel, with a focus on the 300 alloy. -
Material and Construction Standards December 2018 Water District No
MATERIAL AND CONSTRUCTION STANDARDS DECEMBER 2018 WATER DISTRICT NO. 7 JOHNSON COUNTY, KANSAS 534 W. MAIN ST • PO BOX 7 GARDNER, KS 66030 O: 913.856.7375 F: 913.856.7173 WWW.WATER7.COM WATER DISTRICT NO. 7 JOHNSON COUNTY, KANSAS MATERIAL AND CONSTRUCTION STANDARDS December 2018 DIVISION 1 - GENERAL REQUIREMENTS SECTION 01 00 00 - GENERAL REQUIREMENTS PART 1 GENERAL 1.01 SUMMARY A. WORK UNDER THESE CONTRACT DOCUMENTS: The work to be done under these Contract Documents is described as follows: TO BE COMPLETED PER JOB SPECIFIC REQUIREMENTS B. CONSTRUCTION SEQUENCE: The work will be completed in the following sequential order unless otherwise approved by the Owner: TO BE COMPLETED PER JOB SPECIFIC REQUIREMENTS C. LEGAL ADDRESS OF OWNER: The legal address of the Owner is Water District No. 7, 534 West Main, P.O. Box 7, Gardner, KS 66030-0007, telephone number 913/856-7375. D. PROJECT AND CONTRACT LIMITS: The limits for this project are generally defined as the work shown on the drawings and described by the specifications, including connections to the existing water distribution system. E. DRAWINGS: Drawings that form a part of these documents for contract are as listed in the List of Drawings. F. WORKING HOURS: All work shall be done during the day between the hours of 7:00 a.m. and 8:00 p.m. No work shall be done on Saturdays, Sundays, or Holidays. Any deviation from the schedule above must be approved by the Owner. G. RIGHTS-OF-WAY AND EASEMENTS: The necessary property and rights-of-way and permanent and temporary easements for the construction will be provided by the Owner on District projects and by the Property Owner/Developer on private projects.