Global Scrap Trading: HMS 1 & HMS 2 Industrial Specifications
In the ferrous recycling sector, HMS (Heavy Melting Steel) is the primary feedstock for induction furnaces and Electric Arc Furnaces (EAF). WorldwideTradeX supplies verified scrap grades compliant with ISRI standards, ensuring high yield and minimal chemical impurities for melt shops globally.
Table of Contents
- HMS 1 (ISRI 200-202): Premium Heavy Scrap
- HMS 2 (ISRI 203-206): Industrial Blend
- The "80/20" Mix: Commercial Balance
- Technical Specifications Table
1. HMS 1: High-Purity Heavy Melting Steel
HMS 1 is the high-density substrate required for premium steel production.
- Dimensionality: Minimum 1/4 inch thickness. Maximum charging box size of 60x24x24 inches.
- Key Distinction: Strictly non-galvanized and non-alloyed steel.
- Melt Yield: Typically results in 90-95% efficiency.
2. HMS 2: Standard Secondary Scrap
HMS 2 allows for lighter gauge material and galvanized components.
- Dimensionality: Minimum 1/8 inch thickness.
- Inclusion Rule: May include galvanized or black steel (e.g., automotive shells, structural piping).
- Yield Dynamics: Slightly lower than HMS 1 due to the zinc coating and thinner profile.
3. HMS 80:20 Mix: The Industry Standard
The most widely traded commodity in the bulk scrap market is the 80:20 blend.
- Composition: 80% HMS 1 and 20% HMS 2 by volume.
- Commercial Logic: This ratio provides a balance between high-yield performance and cost-effectiveness for mass-market steel bar production.
4. Technical Specifications: Scrap Hub
| Category | Specification / ISRI Code | Standard Yield |
|---|---|---|
| HMS 1 | 200 - 202 (No Galvanized) | 90 - 95% |
| HMS 2 | 203 - 206 (Galvanized OK) | 85 - 90% |
| HMS 1/2 | 80:20 Industry Ratio | 88 - 93% |
| Prohibited | Sealed Vessels / Munitions | 0% Tolerance |
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