IS 1786
Grade Fe 500D / Fe 550D
Engineering Standards
MECHANICAL PROPERTIES
Comparison of mechanical benchmarks against standard specifications.
| Property | Standard IS 1786 Benchmark | ADMASS Fe 500D | ADMASS Fe 550D | Official Verification |
|---|---|---|---|---|
| 0.2% Proof Stress / Yield Stress (Min) | 500 N/mm² (Fe 500D) | Min 500 N/mm² | Min 550 N/mm² | [ADD OFFICIAL DATA] |
| Tensile Strength (TS) (Min) | Min 565 N/mm² | Min 565 N/mm² | Min 600 N/mm² | [ADD OFFICIAL DATA] |
| TS / YS Ratio | ≥ 1.10 | ≥ 1.12 (Superior Safety) | ≥ 1.08 | [ADD OFFICIAL DATA] |
| Total Elongation at Max Force (Agt) | ≥ 5.0% | ≥ 5.5% | ≥ 5.0% | [ADD OFFICIAL DATA] |
| Elongation (GL 5.65√A) (Min) | 16.0% | Min 16.0% | Min 14.5% | [ADD OFFICIAL DATA] |
| Bend Test (Mandrel Diameter) | Up to 20mm: 3d | Over 20mm: 4d | Smooth 180° No Crack | Smooth 180° No Crack | [ADD OFFICIAL DATA] |
Purity Standards
CHEMICAL COMPOSITION
Strictly controlled carbon equivalents and harmful impurities for supreme weldability.
| Constituent Element | Standard Limit (Max) | ADMASS Steel Control Target | Engineering Benefit |
|---|---|---|---|
| Carbon (C) | 0.25% Max | Controlled 0.20% - 0.22% | Enhanced weldability without pre-heating |
| Sulphur (S) | 0.040% Max | 0.035% Max | Reduced hot-shortness & inclusions |
| Phosphorus (P) | 0.040% Max | 0.035% Max | Prevents cold-brittleness at low temps |
| Sulphur + Phosphorus (S+P) | 0.075% Max | 0.070% Max | Extreme metallurgical cleanliness |
| Carbon Equivalent (CE) | 0.42% Max | [ADD OFFICIAL SPECIFICATION] | Safe direct butt & lap welding |
Dimensional Range
AVAILABLE SIZES & WEIGHT TOLERANCES
Nominal bar diameters, cross-sectional areas, and standard meter weights.
| Nominal Size (mm) | Cross-Sectional Area (mm²) | Weight per Meter (Kg/m) | Standard Tolerance | Primary Application |
|---|---|---|---|---|
| 8 mm | 50.3 | 0.395 | ± 7.0% | Stirrups, Ties, Slabs |
| 10 mm | 78.6 | 0.617 | ± 7.0% | Slabs, Beams, Staircases |
| 12 mm | 113.1 | 0.888 | ± 5.0% | Columns, Main Beams, Footings |
| 16 mm | 201.2 | 1.580 | ± 5.0% | Heavy Columns, Raft Foundations |
| 20 mm | 314.2 | 2.470 | ± 3.0% | High-Rise Columns, Retaining Walls |
| 25 mm | 491.1 | 3.850 | ± 3.0% | Bridge Piers, Monumental Abutments |
| 28 mm | 615.8 | 4.830 | ± 3.0% | Flyover Girders, Industrial Foundations |
| 32 mm | 804.2 | 6.310 | ± 3.0% | Mega Dams, Marine Piles, Power Plants |
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