| Title | इस्पात (Steel)Rare Ispāt Steel |
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| Description | इस्पात (Steel), derived from लोहा (iron) ores found across the Indian subcontinent, is a ferrous alloy crucial in modern construction, yet its historical significance in Indic architecture is noteworthy [1]. Its composition, primarily iron with 0.05-2.1% carbon, dictates its properties. Tensile strength ranges from 400-800+ MPa, while density is 7.75-8.05 g/cm³ [2]. Traditionally termed फ़ौलाद, दृढ़ लोहा, or locally உருக்கு (Urukku) in Tamil, ఉక్కు (Ukku) in Telugu, ಉಕ್ಕು (Ukku) in Kannada, and ഉక్కు (Ukku) in Malayalam, steel’s use, though less prevalent than stone or timber in ancient structures, gained prominence during the colonial and post-independence periods. Its application in reinforced concrete (RCC) structures, like bridges and modern buildings, is ubiquitous. Conservation efforts for heritage sites often involve steel reinforcement, necessitating careful material selection to minimize corrosion and ensure structural integrity. Modern steel production methods contrast with traditional smelting techniques, impacting durability and requiring specialized conservation approaches [3]. The Wodeyar Dynasty utilized steel in various structural applications. |
| Also Known As | Steel Ispāt Steel Mild Steel High Strength Steel Alloy Steel फ़ौलाद लोहा दृढ़ लोहा इस्पात உருக்கு (Urukku) ఉక్కు (Ukku) ಉಕ್ಕು (Ukku) ഉక్కు (Ukku) |
| Tags | Steel Iron Reinforcement Metal Alloy इस्पात Corrosion Rebar Structural Steel Tensile Strength Construction Reinforcing Steel |
| Material ID | INHFMAT-408304035-20-11-25-SE |
| URI | https://www.inheritage.foundation/aat/material/steel |
| API Endpoint | https://inheritage.foundation/api/v1/aat/materials/steel |
| Total Sites | 2 |
| Primary Sites | 1 |
| Created | November 20, 2025 |
| Last Updated | November 28, 2025 |
| Types | Metal Alloy Ferrous Alloy Structural Steel Reinforcing Steel |
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| Regions | India Global |
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| Time Periods | Colonial Period Post-Independence Period 20th Century 21st Century |
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| Dynasties | Wodeyar Dynasty |
| Sources | Tata Steel Visakhapatnam Steel Plant SAIL JSW Steel Steel Mills Iron Ore Mines Regional Steel Suppliers |
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| Properties | Tensile Strength: 400-800+ MPa (depending on grade) Yield Strength: 250-550+ MPa (depending on grade) Density: 7.75-8.05 g/cm³ Elongation: 14-30% (depending on grade) Elastic Modulus: ~200 GPa Thermal Expansion Coefficient: 11-13 x 10⁻⁶/°C Carbon Content: 0.05-2.1% |
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| Uses | Reinforcement in Concrete Structures (Rebar) Structural Steel Beams and Columns Roof Trusses Fasteners Tie Rods Foundations Pipes Railings |
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| Materials | Cement Concrete Iron Sand Aggregate Zinc (for Galvanization) Reinforced Concrete Water Welding Electrodes Anti-Corrosion Coatings Welding Materials Bolts Nuts |
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| Styles | Modern Architecture Indo-Saracenic Architecture Reinforced Concrete Structures Contemporary Architecture |
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| Categories | Palace Public Buildings Infrastructure Modern Buildings Temple Bridge Residential Building Commercial Industrial Building Reinforcements |
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| Notes |
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| Title | Type | Notes |
|---|---|---|
| Bureau of Indian Standards (BIS) Codes | Standard | Steel specifications |
| IS 1786:2008 | Standard | Indian Standard for High Strength Deformed Bars and Wires for Concrete Reinforcement |
| Indian Standard Codes for Steel Structures | Standard | Specifications for steel grades and construction practices. |
| Indian Standard Specifications for Steel | Standard | Steel properties and testing |
| IS 800:2007 | Standard | General construction in steel - Code of Practice |
| IS 456:2000 | Standard | Plain and Reinforced Concrete - Code of Practice |
| Steel Authority of India Limited (SAIL) Publications | Industry Publication | Steel properties and applications |
| Site Name | Status | Usage | Confidence |
|---|---|---|---|
| Bala Hanuman Mandir Jamnagar | Primary | 100% | |
| Yadagirigutta Temple Yadadri | Secondary | 100% |