Completar frases 1SBO/1SRO Carbon steels vocabularyVersión en línea Complete the text with the vocabulary from unit 3 about carbon steels in unit 3.8.3 por Cristina Hernández Alcaine 1 Steel is the most widely used engineering material . Technically , though , this well - known of and is not as simple as one might think . Steel comes in a huge range of different grades , each with different characteristics . For the inexperienced , it can be difficult to know where to begin . A good place to start is with the two main types of steel . The first , carbon , consist of iron and carbon , and contain no significant quantitites of other metals . Carbon steels can be divided into three main grades . - steel is a low carbon steel which contains up ot approximately 0'3 % carbon . - carbon steel contains between approximately 0'3% and 0'6% carbon . - carbon steel contains between approximately 0'6% and 1'4% carbon .
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