What Is Uhss – Nissan announced on Monday that it plans to derive 25 percent of its vehicle component weight from ultra-high-strength steel components of at least 980 MPas.

The decision comes as part of June’s sustainability plan, which seeks to reduce the carbon footprint (ie emissions) of Nissan vehicles by 40 percent by fiscal 2022 compared to fiscal 2000. The effort is still commendable.)

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The emissions target will increase the use of high-strength steel below 980 MPa and reduce excess weight from the company’s vehicles.

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Auto body shops and insurers should be prepared for new and existing designs using ultra high strength steel and/or high strength steel, Nissan and Infiniti with new or revised repair restrictions and protections. Changes to these rules may already be in place for Nissan and Infiniti’s existing steel and vehicle portfolios – and if you’re not familiar with such mechanisms, it’s best to understand quickly.

Nissan’s announcement noted the introduction of new 980 MPa high-formability steel on the 2019 Infiniti QX50, which ultimately makes up 27 percent of the SUV’s ultra-high-strength steel.

Such parts are for replacement only. As Infiniti writes in the OEM repair procedure for the 2019 QX50 (which works best in Internet Explorer):

Infiniti does not recommend heating the 440-979 MPa reinforcement in its 2019 QX50 instructions because it “may weaken components.” However, if heat is unavoidable, the temperature should not exceed 550 Celsius/1,022 Fahrenheit, according to the OEM.

Audi Q4 E Tron Body Structure/battery

“When you heat HSS or UHSS parts above 550°C (1,022°F), they should be replaced with new parts,” Infiniti wrote.

“Use a saw instead of a torch to cut these steels to avoid weakening the surrounding parts from the heat,” Infiniti said. Any torch cutting should have a minimum margin of 50mm.

He also warned that drawing high-strength steel parts could cause unexpected deformation due to the strength of the metal. “

“In this case, increase the number of measurement points, and carefully pull the HSS panel,” the OEM wrote to the QX50.

The Applications Of Advanced High Strength Steel

As mentioned above, such considerations are not limited to the new high-form steel that Nissan is known for. For example, Nissan introduced similar restrictions on conventional high- and ultra-high-strength steel used to build the next-generation 2015 Murano and 2016 Maxima a few years ago.

However, there are significant differences between these vehicles (and their successors) and the 2019 QX50’s steel repair/replacement procedures. This proves once again why repairers need to review each vehicle’s repair procedure every time.

Nissan wrote that it worked with Nippon Steel & Sumitomo Metal on the new “high formulation” 980 MPa steel on the QX50, describing itself as the first OEM to use the metal.

“The combination of steel stamping formability and strength makes it possible to produce parts with complex shapes that are thinner and lighter than conventional high tensile strength steel parts, while absorbing energy in collisions,” the OEM wrote. while maintaining capacity,” the OEM wrote.

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A steel expert said at an Automotive Research Management Briefing Seminar last year that third-generation steels, with more shape and more strength, are starting to hit the market.

OEMs can mold the steel into more complex structures that open up new parts of the bodywork, providing greater strength and more impact on structural collision repair. John Catterall, managing director of the Auto/Steel Partnership, told the CAR MBS audience that third-generation multiphase steels are “ideal for crash load paths” such as side structures and front and rear rails.

Nissan calls the 2019 QX50 “the world’s first vehicle with front and rear members made from 980 MPa ultra-high tensile steel and other body frame components.”

The SUV won’t be alone for long. Nissan wrote on Monday that it plans to bring the steel to other vehicles, cold-pressing the metal to “make it suitable for mass production” and help keep costs down.

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“The company is actively developing technologies to increase the use of ultra-high tensile strength steel, which aims to make up 25 percent of the weight of the company’s vehicle components,” Nissan wrote.

Nissan introduced new 980 MPa “Super High Formability” steel in the 2019 Infiniti QX50, eventually building 27 percent of the SUV with ultra-high-strength steel. (provided by Infinity)

Nissan announced on Monday that it plans to derive 25 percent of its vehicle component weight from ultra-high-strength steel components of at least 980 MPas. The OEM notes that it has introduced a new 980 MPa high formability steel on the 2019 Infiniti QX50. (provided by Nissan)

We use cookies to ensure we provide you with the best experience on our website. If you continue to use this site, we will assume that you are happy with it. Ok Privacy Policy Bubble Chart. Banana map. Strength Ductility Diagram of Steel – It has been called many things over the years. But the 2017 chart shown in Figure 1 has been the subject of hundreds of requests for use by engineers and students around the world and appears in thousands of presentations and documents. Because of this, we update it periodically to ensure it reflects the most up-to-date picture of commercially available and emerging steel grades. In this blog, we provide steel classification definitions as agreed by our member companies and our updated GFD for download.

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There are different ways to classify automotive steel. is a metallurgical designation that provides some process information. Common names include low-strength steels (non-medium and mild steels); Traditional high-strength steels, such as mild and high-strength, low-alloy steels (HSLA); and high-strength steels (AHSS), such as dual-phase and transformation-induced plasticity steels. Extra high strength steels include press hardening steels and steels designed for unique applications with edge enhancement and enhanced bending properties.

Another important classification method for part designers is steel strength. This document uses the generic terms HSLA and AHSS to refer to all high strength steels. The main difference between conventional HSLA steels and AHSS is their microstructure. Typical HSLA steels are single-phase ferritic steels with some pearlite potential in C-Mn steels.

AHSS are steels with a multiphase microstructure that contains one or more phases other than ferrite, pearlite, or cementite—for example, martensite, bainite, austenite, and/or substantially retained austenite—unique mechanical properties. To create features. Some types of AHSS have a higher hardening capacity, resulting in a better balance of strength and ductility than conventional steels. Other types exhibit extremely high yield and tensile strength and fire-hardening behavior.

The third generation, or 3rd Gen, AHSS builds on the previously developed 1st Gen AHSS (DP, TRIP, CP, MS, and PHS) and 2nd Gen AHSS (TWIP), with global commercialization beginning in 2020. The third generation AHSS is multiphase. Steels are designed to produce advanced designs measured in tensile, cut edge and/or bending tests. Typically, these steels rely on austenite retained in a bainite or martensite matrix to produce these improved properties, and some amount of ferrite and/or precipitates in specific proportions and distributions.

Honda Has Released The 2016 Honda Civic Body Repair News Bulletin

In general, elongation (a measure of elasticity) decreases as strength increases. Plotting stretch on the vertical axis and strength on the horizontal axis leads to a graph that starts at the top left (higher stretch, lower strength) and moves to the lower right (lower stretch, higher strength). This shape, which can be seen in Figure 1, has led to the colloquial interpretation of it as a banana diagram.

With the continued development of advanced steel options, it is no longer appropriate to describe the abundance of options in banana shape. Instead, it might be more accurate to describe it as a football map, as options now begin to appear in the form of American or rugby football, with the new standards filling the upper right-hand section (see Figure 2 ). Officially it is called steel.

Even this approach has its limitations. Elongation is only a measure of flexibility. Other ductility parameters become more important with the AHSS grade such as pore expansion and bending capacity. There are several methods recommended by experts around the world. To learn more about them, see our Defining Steels article, from which this article is drawn. A detailed explanation of the nomenclature used throughout the guidelines for defining steels can also be found in the definition of steels. If you have questions, please use the comments tool below or on the Defining Steels page.

Due to its popularity, we provide high resolution image files of GFD here for your download and use. Please quote “Courtesy of World Auto Steel” in your documents and offers. We’re glad you’re using it. If you need our signed authorization, please write to us at steel@worldautosteel.org. We will reply soon.

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