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Topic: Yield strength

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In the News (Mon 18 Feb 19)

  Ultralow yield strength steel - Patent 5385617
An ultralow yield strength steel consisting of: from 0.01 to 0.25 wt % of hexagonal boron nitride particles having an average diameter of from 1 to 30.mu.m; and the balance consisting of iron and unavoidable impurities.
The present inventors have found that the yield strength of a steel is lowered by dispersion of hexagonal boron nitride particles in the steel and invented the steels defined in (1), (2) and (3) as follows.
This stress concentration generates a raised stress greater than the yield strength of the matrix iron, so that the iron matrix subjected to this raised local stress begins to deform in a shear manner even when the applied nominal stress is smaller than the yield strength of the matrix iron.
www.freepatentsonline.com /5385617.html   (1795 words)

 Ultimate Tensile Strength
The yield strength is defined as the stress at which a predetermined amount of permanent deformation occurs.
To find yield strength, the predetermined amount of permanent strain is set along the strain axis of the graph, to the right of the origin (zero).
When yield strength is reported, the amount of offset used in the determination should be stated.
www.tpub.com /doematerialsci/materialscience25.htm   (438 words)

 SED Method of Measuring Yield Strength of Adhesives and Other Materials
In the first set, the yield strength of multiple specimens made of the adhesive FM 300K was determined in the dry/cold, moderate, and humid/hot environments; the strain rates were 10/s, 10/s, and 10/s.
To ensure the safety of bonded structures, the yield strength of adhesives should be determined with the SED method, which is based on the fundamental principles of mechanics, instead of on an arbitrary estimate of strain offset.
To ensure that the yield strength of adhesives for bonding load-bearing structures is not systematically overestimated, the authors recommend using the SED method in lieu of the 0.2 % offset method.
www.astm.org /DIGITAL_LIBRARY/STP/PAGES/STP11657S.htm   (337 words)

 Science of Cycling: Frames & Materials: page 3
Yield Strength: This is the amount of the force needed to bend a material to a point where it cannot return to its original shape.
Ultimate Strength: This is the amount of force needed to break a material.
This is the point at which a bicycle frame breaks apart, usually with dangerous consequences for the rider.
www.exploratorium.edu /cycling/frames3.html   (526 words)

 Plotting and Calculations
The Young's modulus is the slope of the initial linear region of the stress-strain curve.
The fracture strength is the value of the stress at the farthest point from the Y-axis.
To measure the yield strength, first draw a zoom of the curve near the initial linear portion containing a little of the yield region as shown in Figure 14.
www.shodor.org /~jingersoll/weave/tutorial/node14.html   (388 words)

 ISO 6930-2:2004 - High yield strength steel plates and wide flats for cold forming -- Part 2: Delivery condition for ...
High yield strength steel plates and wide flats for cold forming -- Part 2: Delivery condition for normalized, normalized rolled and as-rolled steels
ISO 6930-2:2004 specifies the requirements for weldable high yield strength steels for cold forming.
It applies to plates and wide-flats, hot-rolled on reversing mills, both having a thickness between 4 mm and 50 mm (inclusive) and supplied in the normalized, normalized rolled and as-rolled delivery condition.
www.iso.org /iso/CatalogueDetailPage.CatalogueDetail?CSNUMBER=28688&COMMID=&scopelist=ALL   (132 words)

  Liquid metal Technology
One of the direct results of the unique atomic structure of Liquidmetal alloys is very high yield strength, which approaches the theoretical limit and far exceeds the strength currently available in crystalline metals and alloys.
For example, yield strength of over 250 ksi has been achieved in Zr-base and Ti-base Liquidmetal alloys (VIT-001 series).
Another unique property of Liquidmetal alloys is the superior elastic limit; i.e., the ability to retain its original shape (memory) after undergoing very high loads and stress.
www.liquid-metal.info   (630 words)

  Engineering Stress-strain Curve
However, because of the long practice of using the tensile strength to determine the strength of materials, it has become a very familiar property, and as such it is a very useful identification of a material in the same sense that the chemical composition serves to identify a metal or alloy.
The usual definition of this property is the offset yield strength determined by the stress corresponding to the intersection of the stress-strain curve and a line parallel to the elastic part of the curve offset by a specified strain (Fig.
The yield strength obtained by an offset method is commonly used for design and specification purposes because it avoids the practical difficulties of measuring the elastic limit or proportional limit.
www.key-to-steel.com /Articles/Art43.htm   (1877 words)

  Tensile-Strength Tests   (Site not responding. Last check: 2007-10-29)
The yield point B is easily detected either by making a test or from the stress-strain diagram were a more or less sharp break appears in the curve when the yield point is reached.
The ultimate strength is represented b y the maximum ordinate to the stress-strain curve at C. The stress-strain diagram for steel in compression is essentially similar to the curve as described for tension, and the elastic limit is approximately the same in both cases.
In this test the ultimate tensile strength, the yield point, the percent elongation, and the character of the fracture are determined.
www.prep.mcneese.edu /engr/engr316/tentest/tentest.htm   (1111 words)

 Ductile Iron Data - Section 3 - Part 1
The ratio of proportional limit to 0.2% yield strength is typically 0.71 for ferritic grades, decreasing to 0.56 for pearlitic and tempered martensitic grades.
Yield and tensile strengths increase, and elongation decreases, until the matrix becomes fully pearlitic at 0.5% Cu for the Cu-hardened alloy and at 0.06% Sn for the Sn-pearlitized alloy.
5 at a tensile strength of 60 ksi (415 MPa) to 0.3 at a UTS of 150 ksi (1035 MPa).
www.ductile.org /didata/Section3/3part1.htm   (6313 words)

 Yield (engineering) - Wikipedia, the free encyclopedia
Yield strength, or the yield point, is defined in engineering and materials science as the stress at which a material begins to plastically deform.
Offset Yield Point (proof stress) - Due to the lack of a clear border between the elastic and plastic regions in many materials, the yield point is often defined as the stress at some arbitrary plastic strain (typically 0.2% [1]).
A yield criterion, often expressed as yield surface, is an hypothesis concerning the limit of elasticity under any combination of stresses.
en.wikipedia.org /wiki/Yield_strength   (1091 words)

 Mechanical Properties of Metals
Yielding occurs from point A to point B and this is the area of plastic deformation.
The yield stress or yield point is obtained by dividing the load at yield or at point A by the original area.
The impact strength of a metal is determined by measuring the energy absorbed in the fracture.
www.key-to-metals.com /Article53.htm   (1241 words)

 Properties of Materials   (Site not responding. Last check: 2007-10-29)
Yield Strength: The yield point corresponds to the point where the material begins to have permanent (unrecoverable) deformation.
In the absence of a distinct yield point, a 0.2% offset is used to obtain an approximate yield point.
Although the yield and the proportional limit points are close to each other, they do not correspond to the same location on the stress-strain curve.
www.ae.msstate.edu /vlsm/materials/strength_chars/yield.htm   (135 words)

 Tensile strength - Wikipedia, the free encyclopedia
Yield strength is the stress which will cause a permanent deformation of 0.2% of the original dimension.
The yield strength is typically defined by the "0.2% offset strain".
In brittle materials such as rock, concrete, cast iron, or soil, tensile strength is negligible compared to the compressive strength and it is assumed zero for many engineering applications.
en.wikipedia.org /wiki/Tensile_strength   (1164 words)

 Strength of Perforated Metal vs Un-Perforated Material
The use of perforated material is limited by the lack of reliable strength and stiffness properties for use in design.
In perforating this pattern, the direction of the stagger is the short dimension or width of the sheet as illustrated.
As applied herein, the equivalent strength of the perforated material is used in place of the strength of the solid material.
www.hendrickmfg.com /Tech-Info/strength-perf.htm   (341 words)

 Oilfield Glossary: Term 'yield'   (Site not responding. Last check: 2007-10-29)
Yield is commonly expressed in US units as cubic feet per sack (cu.
For example, the yield of N-80 casing is 80,000 psi [552 MPa].
A term used to specify the quality of a clay according to the number of barrels of 30-cp viscosity mud that one ton of the clay would produce.
www.glossary.oilfield.slb.com /Display.cfm?Term=yield   (149 words)

 11.3.5 Crushable foam plasticity models   (Site not responding. Last check: 2007-10-29)
The yield surface represents the Mises circle in the deviatoric stress plane and is an ellipse on the meridional stress plane, as depicted in Figure 11.3.5–1.
The yield surface evolves in a self-similar manner, and the evolution is governed by the equivalent plastic strain (to be defined later).
The shape of the yield surface in the meridional stress plane is depicted in Figure 11.3.5–3.
www.engin.brown.edu:2080 /v6.5/books/usb/pt04ch11s03abm32.html   (2425 words)

 Fisk Alloy Wire Facts -- Tensile, Yield, and Elongation   (Site not responding. Last check: 2007-10-29)
Tensile tests are conducted to determine tensile strength, yield strength and elongation of a material.
The tensile strength is calculated by dividing the maximum load by the original cross-sectional area of the test specimen.
Tensile strength is the mechanical property that wire is specified and produced to.
www.fiskalloy.com /w-fact-pages/w-tensile.html   (440 words)

 Mechanical strength, thermal and pulsed laser tissue welding   (Site not responding. Last check: 2007-10-29)
Yield strength measurements indicated that porcine aorta and intestine have great variations in yield due to structural and thickness variability.
Waterbath heating experiments demonstrated that initial heating had little effect on average yield strength, while laser yield tests indicated a 20% decrease in average yield strength.
Also, yield strength was inversely proportional to number of pulses: i.e., the more pulses fired, the lower the yield strength.
omlc.ogi.edu /pubs/abs/pearson96b.html   (434 words)

 Communication Towers- Frequently Asked Questions   (Site not responding. Last check: 2007-10-29)
A : Strength of a joint is determined not only by the strength of bolts but by the number of bolts also.
Inspection requirements for high yield strength steel, will go up, because strength of structure will be impaired, if " Yield Strength" is not equal to design value.
However when joints are designed on the basis of shear strength only of bolts as happens in case of low strength bolts, the amount of tightening or friction does not contribute to the strength of joint.
www.polyqual.com /pages/faqQuestions/faq.html   (2219 words)

 Strength and Elasticity of Perforated Metal   (Site not responding. Last check: 2007-10-29)
Because they account for more than half of the perforating industry’s production, due to their inherent strength and wide range of open areas, the tests were performed on round hole 60° staggered patterns ranging from.020” to 3/4”.
In this test, the equivalent strength of the perforated material is used in place of the strength of the solid material.
By evaluating the effect of the perforations on the yield strength of the material, S*, can be obtained as a function of the yield strength of the solid or unperforated material, S. Thus, the designer is able to determine safety margins for the perforated material for any geometry of application and any loading conditions.
www.diamondman.com /strength.html   (439 words)

 Aluminum Strength vs Steel Strength
In terms of ultimate strength in the as welded condition, the 150% thicker aluminum plate comes to roughly 58.5k psi "per square area" which is again very close to steel for a structure designed to an "equivalent" standard.
Regarding Corten, in terms of either yield or ultimate strength, if we're comparing an aluminum vessel having a hull structure of the same weight as the same vessel design having a Corten steel structure, it is interesting to note that the aluminum vessel will still be the stronger of the two.
Strength: The overall point to be kept in mind is that an aluminum structure can be made with much larger scantlings, the same or greater strength, and still be much lighter than a similar structure in steel.
www.kastenmarine.com /alumVSsteel.htm   (2897 words)

 Mechanical Properties of Materials - Tensile, Compressive, Shear, Torsional and Yield Strength Defin   (Site not responding. Last check: 2007-10-29)
While data sheets often quote values for strength (e.g compressive strength), these values are purely uniaxial, and it should be noted that in real life several different stresses may be acting.
Compressive strength is defined as the maximum compressive load a body can bear prior to failure, divided by its cross sectional area.
Yield strength is defined as the stress at which a material changes from elastic deformation to plastic deformation.
www.azom.com /Details.asp?ArticleID=3426   (384 words)

 Strength and Stiffness Characteristics
The yield point corresponds to the point where the material begins to have permanent (unrecoverable) deformation.
If the material is ductile, like aluminum, then failure is in the form of excessive yielding, and as such, there is no definite value for the ultimate compressive stress of a ductile material.
It is used to describe the stress-strain relationship in the yield region of the stress-strain diagram.
www.ae.msstate.edu /vlsm/materials/strength_chars   (1125 words)

 Welding Ultra-High-Strength Steels
These steels obtain their high strength by heat treatment to a full martensitic microstructure, which is tempered to improve ductility and toughness.
The medium-alloy quenched and tempered high-yield strength steels are usually welded with the shielded metal arc, gas metal arc, or the submerged arc welding process.
The steels derive their strength while aging at this temperature in the martensitic condition and for this reason are known as maraging steels.
www.key-to-steel.com /Articles/Art99.htm   (2113 words)

 Roscoe Moss - Calculations and Specifications
As a result, shutter screen's collapse strength is up to 60% stronger than the pipe from which it was made.
Collapse strength of wire wrapped screen is dependent on diameter of the screen, size, shape, and material type of wire used in its manufacture, and the slot size.
For continuous slot screen we must determine the yield point for the screen and adjust for the joint connecting the screen body to the welding ring.
www.roscoemoss.com /specs.html   (749 words)

 Does Hot Dip Galvanizing Affect Steel Strength?
The typical yield strength is between 520 to 610 mPa.
The typical yield strength is between 470 to 550 mPa.
If the results of the yield strengths of the fl sections and the results for the galvanized sections of the GALVASPAN G450 are averaged, the difference is 0.6%.
www.corp.indgalv.com.au /technical/steelstr.htm   (748 words)

 Stainless Steel - Mechanical Properties   (Site not responding. Last check: 2007-10-29)
As engineering design calculations are frequently made on yield criterion the low yield strength of austenitic stainless steels may well mean that their design load cannot be higher than that of mild steel, despite the tensile strength being substantially higher.
Spring wire has the highest tensile strength of the wire generally manufactured; it must be suitable for coiling into tension or compression springs without breaking during forming.
Weaving wires are supplied in a variety of tensile strengths carefully chosen so that the finished woven screen will have adequate strength to withstand the service loads, and yet soft enough to be crimped and to be formed into the screen satisfactorily.
www.azom.com /details.asp?ArticleID=1181   (808 words)

 Keeping It All Together, Part 1   (Site not responding. Last check: 2007-10-29)
The bolt material strength is determined by the alloy and processing method (for example, cold working and heat treating.) The two important material properties are the tensile strength and yield strength.
The yield strength is the stress level where the material yields or permanently deforms.
(116,000 psi) and a yield strength of 640 newtons/mm
home.jtan.com /~joe/KIAT/kiat_2.htm   (2278 words)

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