Siemens-Martin open hearth process
                        
                            GPTKB entity
                        
                    
                Statements (27)
| Predicate | Object | 
|---|---|
| gptkbp:instanceOf | gptkb:steelmaking_process | 
| gptkbp:advantage | high energy consumption ability to use scrap metal better control of composition slow process | 
| gptkbp:category | metallurgy industrial processes | 
| gptkbp:developedBy | gptkb:Pierre-Émile_Martin gptkb:Carl_Wilhelm_Siemens | 
| gptkbp:historicalPeriodOfUse | 20th century late 19th century | 
| gptkbp:introducedIn | gptkb:France 1860s | 
| gptkbp:namedAfter | gptkb:Pierre-Émile_Martin gptkb:Carl_Wilhelm_Siemens | 
| gptkbp:replacedBy | gptkb:basic_oxygen_process gptkb:electric_arc_furnace | 
| gptkbp:significance | enabled mass production of steel | 
| gptkbp:usedFor | steel production | 
| gptkbp:uses | gptkb:limestone gptkb:iron_ore regenerative furnace coal gas scrap steel | 
| gptkbp:bfsParent | gptkb:Sir_William_Siemens | 
| gptkbp:bfsLayer | 6 | 
| https://www.w3.org/2000/01/rdf-schema#label | Siemens-Martin open hearth process |