Chemical Composition Of Isc T20503 Steel And Its Impact On Industry - China

ISC T20503 steel corresponds to Cr5Mo1V (chromium 5, molybdenum 1, vanadium), belonging to alloy tool steel.

Its core components are mainly C, Cr, Mo, and V.

It possesses excellent hardenability, wear resistance, and thermal stability, and is widely used in industrial applications such as cold-working and hot-working dies, supporting precision manufacturing and high-efficiency production.

Core Chemical Composition (mass fraction, wt%) |Element|Content Range|Function and Influence| | | | | |Carbon (C)|0.55~1.05|Determines strength and hardness, improves ISC T20503 steel Wear resistance; excessively high levels decrease toughness and machinability.

| Silicon (Si) | ≤0.50 | Strengthens ferrite, improves elastic limit and oxidation resistance.

| Manganese (Mn) | ≤1.00 | Deoxidizes and desulfurizes, reduces hot brittleness, and improves strength and hardenability.

| Phosphorus (P) | ≤0.030 | Harmful element, controls cold brittleness, and ensures low-temperature toughness.

| Sulfur (S) | ≤0.030 | Harmful element, controls hot brittleness, and ensures hot working performance.

|Chromium (Cr)| 4.80~5.50| Significantly improves hardenability, wear resistance, and corrosion resistance; forms a carbide strengthening phase.

|Molybdenum (Mo)| 0.90~1.40| Refines grain size, improves thermal stability and tempering resistance, and suppresses temper brittleness.

|Vanadium (V)| 0.15~0.50| Forms hard carbides, significantly improves wear resistance and red hardness, and refines the microstructure.

|Iron (Fe)| Balance| Matrix element; maintains the basic morphology and machinability of ISC T20503 steel.

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