Science · Chemistry
कठोर स्टील (Hard steel) में कार्बन का प्रतिशत आमतौर पर कितना होता है?
- 10.01% से 0.04%
- 20.1% से 0.4%
- 30.5% से 1.5%✓
- 42.0% से 5.0%
सही उत्तर देखें
0.5% से 1.5%
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