H13 Blade Material Variations
1.Non-standard H13 (Substandard/Scrap-based): Produced from scrap steel (Ditiao steel) without adhering to formal chemical or quality standards.

2.Standard H13 (Scrap-based): Scrap-based steel that claims to meet the basic GB (National Standard) chemical composition but lacks purity.

3.ESR H13 (Scrap-based): Scrap-based H13 that has undergone Electroslag Remelting (ESR) to improve cleanliness, though the base material remains inferior.

4.Standard GB H13 (National Standard): Conventional H13 tool steel manufactured by reputable mills following the Chinese National Standard (GB/T 1299).

5.ESR H13 (Electroslag Remelted): High-quality H13 produced via the ESR process, resulting in improved isotropic properties and reduced impurities.

6.Ultra-refined ESR H13: Premium ESR H13 that has undergone specialized processing (such as your mentioned forging and heat treatment) to achieve an ultra-fine grain structure.

7.PESR H13 (Pressure/Protective Atmosphere ESR): The highest tier; H13 produced via Electroslag Remelting under a Protective Atmosphere, preventing oxidation and ensuring maximum material purity and toughness.

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