EP 4416312 A1 20240821 - HIGH HARDNESS LOW ALLOYED HOT ROLLED STEEL AND METHOD OF MANUFACTURING THEREOF
Title (en)
HIGH HARDNESS LOW ALLOYED HOT ROLLED STEEL AND METHOD OF MANUFACTURING THEREOF
Title (de)
NIEDRIG LEGIERTER, WARMGEWALZTER STAHL MIT HOHER HÄRTE UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
ACIER LAMINÉ À CHAUD FAIBLEMENT ALLIÉ DE HAUTE DURETÉ ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- IN 202131047704 A 20211020
- IB 2022060094 W 20221020
Abstract (en)
[origin: WO2023067544A1] A high hardness low alloyed hot rolled steel having improved abrasion resistance, impact toughness, hardness, and weldability is provided. The high hardness low alloyed hot rolled steel comprises the following composition expressed in weight %: C: 0.10-0.25, Mn: 1.05-1.5, Si: 0.25-0.35, Cr: 0.15-0.25, Mo: 0.05-0.15, Ni: 0.45-0.55, Al: 0.15-0.25, carbon equivalent: 0.34-0.69, and the balance being Iron (Fe) and unavoidable impurities. The high hardness low alloyed hot rolled steel comprises a microstructure of maximum 10 % ferrite, maximum 10% austenite, maximum 20% pearlite, maximum 20% bainite and 60-100 % martensite. The high hardness low alloyed hot rolled steel exhibits tensile strength ≥ 600 MPa, a total elongation 10-20%, a hardness ≥ 200 Hv, and a yield strength ≥ 500 MPa. A method (100) for manufacturing high hardness low alloyed hot rolled steel strip of the above-mentioned composition is also provided.
IPC 8 full level
C22C 38/06 (2006.01); C21D 1/18 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01)
CPC (source: EP)
C21D 1/18 (2013.01); C21D 6/004 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0263 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C21D 2211/008 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2023067544 A1 20230427; EP 4416312 A1 20240821; JP 2024537914 A 20241016
DOCDB simple family (application)
IB 2022060094 W 20221020; EP 22800790 A 20221020; JP 2024523937 A 20221020