# Harder Than Before (DD-242)

> Steel is an alloy of iron with a small amount of carbon, usually less than 2%, and often other elements. Most steel is made by smelting iron ore with coke in a blast furnace and then refining the iron in a basic oxygen furnace; much of the rest is made by melting scrap in electric arc furnaces. The steel is cast, then rolled or forged into shapes, and finished with heat and surface treatments. According to the World Steel Association, world production was about 1.89 billion tonnes in 2023. The footage shows furnaces, casting and rolling mills, with the presenter.

- Department: Tech (also Science)
- First published: 2024-05-26
- Last updated: 2024-05-26
- Permalink: https://detailenjoyer.com/case/harder-than-before/
- Author: Marcus Easterling (DetailEnjoyer), The Detail Department

## Quick facts

- **DD-242-F01**: Steel is iron with a little carbon. _(Write-up · Exhibit A (Alloy))_
- **DD-242-F02**: Ore is smelted in a blast furnace. _(Write-up · Exhibit B (Blast furnace))_

## Write-up

Steel is iron with a small amount of carbon added. The world makes close to 1.9 billion tonnes a year.

1. **Alloy**: Steel is iron with a little carbon.
2. **Blast furnace**: Ore is smelted in a blast furnace.
3. **Electric arc**: Scrap is melted in electric arc furnaces.
4. **Shaping**: Steel is cast, rolled and forged.
5. **Output**: About 1.89 billion tonnes were made in 2023.

## Related case files

- [Bethlehem Steel (DD-010)](https://detailenjoyer.com/case/bethlehem-steel/): I linked a famous steelmaker
- [Rolling Steel (DD-423)](https://detailenjoyer.com/case/rolling-steel/): I linked how steel is made
- [Quenching (DD-524)](https://detailenjoyer.com/case/quenching/): I linked how steel is made

## Reel vs. record

- **Note**: None needed.

## Video: Harder Than Before: Steel Is Iron With a Small Amount of Carbon Added

- Duration: 33.0 s · Published: 2024-05-26
- File: https://detailenjoyer.com/assets/videos/C7ca6AMpgTm.mp4

### Transcript

Steel is one of the most widely used materials in the world, essential for buildings, infrastructure, vehicles, and more. The production of steel begins with the extraction of iron ore, which is then processed into iron in a blast furnace. The iron is then combined with carbon and other alloying elements to create steel. This steel is formed into various shapes and sizes through processes like casting, rolling, and forging. The final steel products undergo finishing processes such as heat treatment and surface treatment before being ready for use. With over 1.8 billion tons of steel produced annually worldwide, the steel industry plays a vital role in the global economy and infrastructure development. NOW YOU KNOW!

## Questions & answers

**Q: What is steel?**  
A: An alloy. _(Source: Write-up · Exhibit A (Alloy) · Wikipedia: Steel)_

**Q: Where is iron ore smelted?**  
A: With coke. _(Source: Write-up · Exhibit B (Blast furnace) · Wikipedia: Steel)_

**Q: What melts scrap steel?**  
A: Recycling. _(Source: Write-up · Exhibit C (Electric arc) · Wikipedia: Steel)_

**Q: How is steel shaped?**  
A: Into products. _(Source: Write-up · Exhibit D (Shaping) · Wikipedia: Steel)_

**Q: About how much was made in 2023?**  
A: worldsteel. _(Source: Write-up · Exhibit E (Output) · worldsteel: World Steel in Figures 2024)_

## Sources

- [Wikipedia: Steel](https://en.wikipedia.org/wiki/Steel)
- [worldsteel: World Steel in Figures 2024](https://worldsteel.org/data/world-steel-in-figures-2024/)

## Cite this case file

Easterling, Marcus. "Harder Than Before." The Detail Department (DetailEnjoyer), case file DD-242, last updated May 26, 2024. https://detailenjoyer.com/case/harder-than-before/