Steel material for high heat input welding
US11326238B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 30, 2017 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Dec 31, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23K2103/04
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Provided is a steel material for high heat input welding having excellent welding heat affected zone low-temperature toughness at −55° C. in the case that the steel material is welded by high heat input welding with a heat input of more than 80 kJ/cm. The steel material may be used in low-temperature storage tanks, for example. The steel material for high heat input welding includes, in mass %, C: 0.04 to 0.09%, Si: 0.15 to 0.25%, Mn: 1.40 to 2.00%, P: 0.015% or less, S: 0.0005 to 0.0040%, Al: 0.030 to 0.080%, Ti: 0.005 to 0.025%, B: 0.0003 to 0.0020%, Ca: 0.0005 to 0.0030%, N: 0.0030 to 0.0060%, O: 0.0040% or less, Nb: 0.005% or less, and Mo: 0.005% or less, the balance being Fe and incidental impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.