High Carbon Ferro Manganese Mn70-C7.5 – Premium Grade for Structural & Low-Alloy Steel
High-performance high carbon ferro manganese with 70-73% manganese and controlled carbon (≤7.5%). Ideal for structural steel, plate, and long products requiring consistent manganese addition.
| Main Composition | Mn 70-73%, C ≤7.5%, Si ≤2.0%, P ≤0.20%, S ≤0.03% (typical for Mn70-C7.5) |
| Form | Lumps (10-80mm), Granules (2-15mm), Powder (0-2mm, 0-10mm), Custom sizes available |
| Application | Steel deoxidation, alloying (structural, HSLA), cast iron, welding electrodes, foundries |
| Standard | GB/T 3795-2014, ASTM A99, ISO 5446 |
High Carbon Ferro Manganese Mn70-C7.5 – Product Overview
High Carbon Ferro Manganese (HCFeMn) grade Mn70-C7.5 is a workhorse alloy for the steel industry, produced by carbothermic reduction of high-grade manganese ores. With a manganese content of 70-73% and carbon limited to 7.5%, this grade offers an excellent balance of Mn input and cost efficiency for structural steel, plate, and heavy sections. It ensures effective deoxidation, desulfurization, and alloying while maintaining predictable metallurgical behavior.
Product Core Advantages
- Optimized Manganese Range: 70-73% Mn with tight control of impurities (Si, P, S) for reliable performance in critical steel grades.
- Versatile Application: Suitable for carbon steels, high-strength low-alloy (HSLA) steels, rail steels, and cast irons.
- Custom Sizing: Available in lumps, granules, or powder to match your furnace charging, conveyor, or injection systems.
- Cost-Effective: Higher Mn content than Mn65 reduces gangue and improves yield per ton of steel.
- Stable Supply: Produced from selected manganese ores with strict quality control from raw material to finished product.
Typical Application Areas
Mn70-C7.5 High Carbon Ferro Manganese is essential in many metallurgical processes:
- Structural Steel Deoxidation: Manganese combines with oxygen and sulfur to form MnO and MnS inclusions, improving hot workability and mechanical properties.
- Alloying Element: Increases strength, hardness, and wear resistance in structural beams, plates, and reinforcing bars.
- HSLA Steels: Used in combination with other microalloys to achieve fine-grain strength without excessive carbon.
- Cast Iron: Added to gray and ductile iron to control pearlite content and increase tensile strength.
- Welding Electrodes: Used as a coating component to stabilize the arc and improve weld metal toughness.
For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.
Technical Specifications – High Carbon Ferro Manganese Grades
Our High Carbon Ferro Manganese is produced to meet international standards with strict quality control. Below is the chemical composition of our primary grade Mn70-C7.5 compared with other common industrial grades for reference.
Chemical Composition (Typical Values, % by weight)
| Grade / Designation | Mn (%) | C (%) | Si (%) | P (%) | S (%) | Typical Application |
|---|---|---|---|---|---|---|
| Mn70-C7.5 | 70-73 | ≤7.5 | ≤2.0 | ≤0.20 | ≤0.03 | Structural steel, low-alloy steel, plates |
| Mn65-C7.0 | 70-73 | ≤7.0 | ≤1.5 | ≤0.20 | ≤0.03 | Carbon steel, general deoxidation |
| Mn75-C2.0 | 75-78 | ≤2.0 | ≤1.8 | ≤0.18 | ≤0.02 | Medium-carbon steel, high-strength low-alloy |
| Mn75-C8.0 | 75-78 | ≤8.0 | ≤1.5 | ≤0.2 | ≤0.02 | Carbon steel, cost-sensitive applications |
| Mn78-C1.5 | 78-81 | ≤1.5 | ≤1.5 | ≤0.15 | ≤0.02 | Specialty steel, low-carbon requirements |
| Mn80-C0.7 | 80-83 | ≤0.7 | ≤1.2 | ≤0.12 | ≤0.015 | High-purity, stainless steel, refined alloys |
Physical Properties (Typical for Mn70-C7.5)
| Property | Value | Unit |
|---|---|---|
| Melting Range | 1150-1300 | °C |
| Density (at 20°C) | 7.1-7.4 | g/cm³ |
| Appearance | Silvery-gray metallic lumps / granules | - |
| Bulk Density (lumps) | 3.5-4.0 | g/cm³ |
Available Sizes
- Lumps: 10-80mm, 20-100mm, 50-150mm (standard), custom sizes available
- Granules: 2-15mm, 1-8mm
- Powder: 0-2mm, 0-10mm, -100 mesh, -200 mesh
- Custom Sizes: Available upon request to meet specific process requirements (e.g., cored wire)
Application Guidelines – High Carbon Ferro Manganese Mn70-C7.5
High Carbon Ferro Manganese grade Mn70-C7.5 is a versatile material with the following primary applications:
Steel Deoxidation & Desulfurization
Added to molten steel in the ladle or furnace (typically 5-15 kg per ton) to combine with dissolved oxygen and sulfur, forming oxides and sulfides that float out, improving steel cleanliness and reducing hot shortness. Mn70-C7.5 provides a higher manganese concentration than Mn65, reducing the required addition volume.
Alloying in Structural & HSLA Steels
Manganese increases hardenability, tensile strength, and wear resistance. Common in ASTM A36, A572, and European structural grades S235-S355. Addition rates range from 0.5% to 1.8% Mn depending on the target specification. Our consistent chemistry ensures accurate final composition.
Rail & Heavy Section Steels
In rail steels (e.g., R260, R350), manganese contents of 1.0-1.5% are typical to achieve the required hardness and wear resistance. Mn70-C7.5 is an economical source for these applications.
Cast Iron Production
In gray and ductile iron, manganese helps control the pearlite/ferrite balance and neutralizes sulfur's negative effects. Typical additions are 0.3-1.0% depending on iron type.
Welding Electrodes & Fluxes
Ground to fine powder and used in electrode coatings or as a component of agglomerated fluxes for submerged arc welding, improving arc stability and weld metal toughness.
Packaging & Logistics – High Carbon Ferro Manganese Mn70-C7.5
Packaging Options
We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:
- 1‑ton Jumbo Bags: Common option, easy to handle with standard equipment.
- 25kg / 50kg Bags: For smaller orders or specific application requirements (e.g., foundries).
- Custom Packaging: We can accommodate special packaging requests, including moisture-proof liners, steel drums, or bulk bags with discharge spouts.
Logistics Information
| Parameter | Details |
|---|---|
| Minimum Order Quantity | 20 metric tons (trial orders possible for 5-10 tons subject to availability) |
| Lead Time | 15-25 days after order confirmation |
| Port of Loading | Main Chinese ports (Tianjin, Shanghai, Qingdao, Huangpu) |
| Shipping Options | FOB, CIF, CFR, DAP (depending on destination) |
| Payment Terms | T/T, L/C at sight, or negotiable |
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Access our technical documentation for detailed product information:
Frequently Asked Questions – High Carbon Ferro Manganese Mn70-C7.5
What are the main advantages of using Mn70-C7.5 over Mn65-C7.0?
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Mn70-C7.5 contains 70-73% manganese compared to 60-65% in Mn65-C7.0. This higher manganese content means you need to add less material to achieve the same final Mn percentage in steel, reducing handling, slag volume, and sometimes improving yield. It is particularly advantageous when aiming for medium manganese levels in structural or HSLA grades.
Is Mn70-C7.5 suitable for steel grades with strict carbon limits?
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With carbon up to 7.5%, Mn70-C7.5 is considered a high-carbon grade. For steels requiring low carbon (e.g., below 0.1% C after alloying), we recommend our medium-carbon grades like Mn75-C2.0 or low-carbon Mn78-C1.5. However, for most carbon and low-alloy steels, the carbon contribution from Mn70-C7.5 is acceptable and often compensated in the melting practice.
What sizes are recommended for conveyor-fed furnaces?
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For conveyor or skip charging, lumps in the range of 10-80mm are ideal to prevent segregation and ensure smooth flow. For pneumatic injection, we supply graded granules (1-8mm) or specific cuts. We can customize sizing based on your handling equipment.
Is it possible to entrust a third-party inspection to check the quality before shipment?
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Certainly, we support third-party inspections by internationally recognized quality inspection agencies such as SGS and BV to verify product quality before shipment. The inspection covers product appearance, weighing, dimensions, and chemical composition analysis. The entire inspection process will be documented with photos and written records, which will be provided to you together with the final inspection report. This ensures you have no concerns regarding product quality.
Do you provide a certificate of analysis with each shipment?
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Absolutely. Every batch of Ferro Manganese Mn70-C7.5 is tested in our ISO 17025 accredited laboratory, and a Certificate of Analysis (COA) showing Mn, C, Si, P, S, and other elements is provided with the shipping documents.
What is your production capacity for Mn70-C7.5 grade?
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We have an annual production capacity exceeding 80,000 metric tons of ferro manganese across all grades. Mn70-C7.5 is one of our most popular grades, and we maintain stock flexibility to meet both container and bulk vessel shipment schedules.
Why Choose Our Ferro Manganese
20+ Years Experience
Specialized in ferroalloy production with deep industry knowledge
Strict Quality Control
Every batch tested to ensure consistent composition and performance
Global Delivery
Reliable logistics network ensuring timely delivery worldwide
Quality & Production Showcase
Explore our quality control process, production facilities, and customer interactions
HC/MC/LC FeMn Comparison
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