http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2018188697-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c60cbeb32859b75d089103559c856e48 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22C38-00 |
| filingDate | 2017-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_248317b85cb001dbce6040a87cc79438 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1e93306c2ab928f89644284ffc609692 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c4f3fcdb467b8fa19cc0c21e1bb8d2ee http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0567ec8d60b76d84a3d839e85e0dd48c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e5617d516615a7401f8ed761f38f637a |
| publicationDate | 2018-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-2018188697-A |
| titleOfInvention | Seamless steel pipes for steel and oil wells |
| abstract | A steel material having high strength and excellent sour resistance properties and a seamless steel pipe for oil wells are provided. A steel material according to the present invention is, in mass%, C: more than 0.45 to 0.70%, Si: 1.0% or less, Mn: 0.1 to 3.0%, Cr: 0.1. -3.0%, Al: 0.001-1.0%, P: 0.05% or less, S: 0.01% or less, and N: 0.01% or less, with the balance being Fe and Consists of impurities. The metal structure contains tempered martensite with an area ratio of 90.0% or more. The prior austenite grain size of the tempered martensite is 5.0 μm or less. Tempered martensite contains crystal grains having an area ratio of 50% or more and an aspect ratio of less than 3.0. The ratio YS / TS of the yield strength YS to the tensile strength TS is 0.95 or more. The yield point elongation is 2.5% or more. [Selection] Figure 1A |
| priorityDate | 2017-05-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 25.