{"id":1020,"date":"2026-06-30T09:26:57","date_gmt":"2026-06-30T09:26:57","guid":{"rendered":"https:\/\/www.wudejiansteel.com\/?p=1020"},"modified":"2026-06-30T09:26:58","modified_gmt":"2026-06-30T09:26:58","slug":"only-steel-with-a-tensile-strength-exceeding-1470-mpa-can-be-classified-as-ultra-high-strength-steel","status":"publish","type":"post","link":"https:\/\/www.wudejiansteel.com\/?p=1020","title":{"rendered":"Only steel with a tensile strength exceeding 1,470 MPa can be classified as ultra-high-strength steel."},"content":{"rendered":"\n

It is generally accepted that steel with a tensile strength of o>1470 MPa (150 kgf\/mm\u00b2) that also possesses toughness is referred to as ultra-high-strength steel; today, there are also ultra-high-strength steels with tensile strengths reaching 2400 MPa.<\/p>\n\n\n\n

 Ultra-high-strength steel is primarily used in rocket engine casings, aircraft landing gear, fuselage frames and skins, high-pressure vessels, and certain components of conventional weapons. The scope of application for ultra-high-strength steel is continuing to expand, with many civilian components now requiring its use.<\/p>\n\n\n\n

 Based on differences in composition and performance characteristics, ultra-high-strength steel can be classified into the following five major categories:<\/p>\n\n\n\n

1) Low-alloy ultra-high-strength steel. Primarily used in applications at room temperature or below 200\u00b0C, it evolved from low-alloy quenched and tempered steel.<\/p>\n\n\n\n

2) Secondary-hardening medium-alloy ultra-high-strength steel. This type of medium-carbon alloy steel has a relatively high alloy content and excellent hardenability. After quenching, it achieves the required strength through secondary hardening caused by carbide precipitation during tempering; its tensile strength can reach<\/p>\n\n\n\n

2750 MPa. At around 500\u00b0C, its specific strength is the highest among all ultra-high-strength steels. Representative grades in this category include H11 (4Cr5MoSiV) and H13 (4Cr5MoSiV1).<\/p>\n\n\n\n

3) Secondary hardening-type high-alloy ultra-high-strength steels. These steels feature a high-toughness Fe-Ni-Co matrix reinforced by fine M2C-type carbides in the normal aged condition. They exhibit an excellent balance of strength and toughness, high fatigue strength, and high resistance to stress corrosion.<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

4) Age-hardening martensitic steel. This type of high-alloy steel achieves high strength through the age-hardening of ultra-low-carbon alloy martensite, with a tensile strength approaching 2200 MPa (megapascals).<\/p>\n\n\n\n

5) Precipitation-hardening ultra-high-strength stainless steel. Under certain operating conditions, materials must not only possess ultra-high strength but also exhibit good corrosion resistance and oxidation resistance; precipitation-hardening stainless steel is designed to meet these requirements.<\/p>\n\n\n\n

I haven\u2019t worked with ultra-high-strength steel myself, and it\u2019s unlikely to come up in my line of work, but I need to understand it\u2014you never know when a viewer might ask about it during a live stream.<\/p>\n\n\n\n

When viewers ask questions, I can\u2019t just say, \u201cI don\u2019t know,\u201d and I certainly can\u2019t say, \u201cHold on a moment; I\u2019ll look it up and get back to you.\u201d<\/p>\n\n\n\n

 As the saying goes, \u201cThe usefulness of the seemingly useless is what makes it truly useful.\u201d <\/p>\n\n\n\n

 *************<\/p>\n\n\n\n

Wu Dejian’s\u00a0tool\u00a0steel<\/a><\/strong>, the chief of staff of the user, bought everything he had used.<\/p>\n","protected":false},"excerpt":{"rendered":"

It is generally accepted that steel with a tensile strength of o>1470 MPa (150 kgf\/mm\u00b2) that also possesses toughness is referred to as ultra-high-strength steel; today, there are also ultra-high-strength steels with tensile strengths reaching 2400 MPa.  Ultra-high-strength steel is primarily used in rocket engine casings, aircraft landing gear, fuselage frames and skins, high-pressure vessels, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1020","post","type-post","status-publish","format-standard","hentry","category-blog"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t