Sulfurized Extreme Pressure Additives
Performance-Driven Sulfur Technologies for Metalworking Fluids and Industrial Lubricants
Dover Chemical offers one of the industry's broadest portfolios of sulfurized extreme pressure (EP) additives for metalworking fluids, industrial lubricants, and specialty formulations. Our sulfur technologies are designed to improve machining performance, reduce tool wear, enhance lubricity, and support demanding cutting, forming, drilling, and tapping operations across a wide range of ferrous and non-ferrous alloys.
Why Choose Dover Sulfurized EP Additives
Dover's sulfurized additives provide a versatile platform for formulators seeking extreme pressure performance across a broad range of metalworking operations. Multiple sulfur technologies are available to support application-specific requirements, including active sulfur, inactive sulfur, sulfurized esters, sulfurized oils, and sulfurized hydrocarbons.
Extreme Pressure Performance
Active & Inactive Sulfur Options
Broad Product Portfolio
Lubricity Enhancement
Application Flexibility
Non-Staining Options Available
Where Dover Sulfurized EP Additives Perform
Dover sulfurized additives are used across a broad range of metalworking and industrial lubricant applications requiring extreme pressure performance, lubricity enhancement, and tool protection.
Applications
- Cutting Fluids
- Machining Fluids
- Drilling Fluids
- Tapping Fluids
- Grinding Fluids
- Honing Fluids
- Trepanning Fluids
- Drawing Fluids
- Stamping Fluids
- Cold Heading Fluids
- Metal Forming Lubricants
- Rolling Oils
- Neat Oils
- Soluble Oils
- Semi-Synthetic Metalworking Fluids
- Industrial Lubricants
Functions
- Extreme Pressure Performance
- Lubricity Enhancement
- Boundary Lubrication
- Tool Protection
- Wear Reduction
- Surface Finish Improvement
- Galling Prevention
- Metal Deformation Support
- Load-Carrying Performance
- Friction Reduction
- Wetting Enhancement
- Formulation Optimization
- Stain Control
- Severe-Duty Machining Support
Materials
- Carbon Steel
- Stainless Steel
- Alloy Steel
- Tool Steel
- Cast Iron
- Copper Alloys
- Brass
- Bronze
- Aluminum
- Titanium Alloys
- Nickel Alloys
- High-Temperature Alloys
- Exotic Alloys
- Ferrous Metals
Product Overview
Sulfurized EP additives function by chemically reacting with metal surfaces under elevated temperature and pressure conditions to form protective films that reduce friction, wear, and welding of metal surfaces. Sulfur chemistries typically activate at lower temperatures than chlorinated additives, making them particularly effective in machining operations involving stainless steels and other difficult-to-machine alloys.
Dover offers a broad range of sulfurized technologies including sulfurized esters, sulfurized oils, sulfurized hydrocarbons, and sulfurized specialty blends designed to deliver varying levels of sulfur activity, lubricity, and formulation compatibility.
Active vs. Inactive Sulfur
Sulfur additives are commonly categorized as active (staining) or inactive (non-staining). Active sulfur additives activate at lower temperatures and provide excellent performance in difficult machining operations but may stain copper and other non-ferrous metals. Inactive sulfur additives provide extreme pressure performance while minimizing staining concerns in applications involving copper, brass, bronze, or aluminum.
Sulfurized Ester vs. Hydrocarbon Technologies
Sulfurized esters and sulfurized oils provide both lubricity and extreme pressure performance, making them well suited for machining and general-purpose metalworking fluids. Sulfurized hydrocarbons offer higher sulfur content and stronger EP performance but contribute less lubricity and are typically selected for more demanding operations requiring elevated sulfur treat levels.
Sulfur Activity & Application Matching
Sulfurized EP additives are available across a range of sulfur contents, activity levels, and viscosity profiles to support specific machining operations and metalworking requirements. Lower sulfur and inactive sulfur technologies are commonly selected where stain resistance and lubricity are priorities, while higher sulfur and active sulfur technologies provide increased extreme pressure performance for severe-duty machining, metal forming, drilling, and tapping operations. Dover's broad sulfur portfolio allows formulators to balance sulfur activity, lubricity, and metal compatibility to meet application-specific performance objectives.
Technical Overview
Sulfurized extreme pressure additives are designed to improve lubrication performance under conditions of elevated temperature, pressure, and metal-to-metal contact. By forming protective boundary films on metal surfaces, these technologies help reduce friction, minimize tool wear, improve surface finish, and support demanding machining and metal forming operations.
Dover's sulfur additive portfolio includes active and inactive sulfur chemistries, sulfurized esters, sulfurized oils, and sulfurized hydrocarbons. Multiple sulfur levels, viscosity profiles, and lubricity characteristics are available, allowing formulators to select the appropriate technology based on metal type, operation severity, stain requirements, and overall performance objectives.
| Property | Value |
|---|---|
| Product Family | Sulfurized Extreme Pressure Additives |
| Technology Platforms | Sulfurized Esters, Sulfurized Oils, Sulfurized Hydrocarbons & Specialty Blends |
| Primary Applications | Machining, Drilling, Tapping, Drawing, Stamping & Forming |
| Primary Function | Extreme Pressure Performance, Lubricity Enhancement, Wear Reduction, Surface Finish Improvement & Stain Control |
| Selection Factors | Metal Type, Operation Severity, Sulfur Activity, Stain Requirements & Formulation Objectives |
| Product Portfolio | Multiple Sulfurized Technologies with Active & Inactive Sulfur Options |
| Technical Support | Application-Specific Product & Formulation Guidance |
Available Products
Dover's sulfur additive portfolio includes non-staining sulfurized esters and oils, higher-activity sulfurized technologies, and active sulfurized hydrocarbons. Products are grouped by chemistry and performance profile to help formulators identify the appropriate solution for their application.
Non-Staining Sulfurized Esters & Oils
Designed for applications requiring lubricity enhancement and extreme pressure performance without staining copper, brass, bronze, or aluminum alloys.
| Product | Sulfur % | Key Characteristics |
|---|---|---|
| Base 10SE | 10 | Low viscosity sulfurized methyl ester with improved wetting |
| Mayco Base 10V | 10.5 | Vegetable-based sulfurized oil with excellent lubricity and cutting performance |
| Maysperm 2011LV | 10.5 | Low-viscosity sulfurized lard/ester for honing, grinding, and trepanning |
| Mayco Base 1351 | 10.5 | Sulfurized lard/olefin with excellent base oil solubility and dual-purpose performance |
| Maysperm 2011 | 10.5 | Moderate-to-high viscosity sulfurized lard oil/ester for machining and grease applications |
| Mayco Base 1210 | 10.5 | High-viscosity sulfurized lard oil for compounding metalworking oils and greases |
Staining Sulfurized Esters & Oils
Designed for more demanding machining and metal deformation applications where higher sulfur activity is required.
| Product | Sulfur % | Key Characteristics |
|---|---|---|
| Base 12SE | 13 | Low-viscosity sulfurized methyl ester with improved wetting |
| Mayco Base 15SE / 155E | 15.5 | Vegetable-based sulfurized ester with improved lubricity |
| Mayco Base 4220 | 18 | Sulfurized ester/olefin blend with good solubility and wetting |
| Mayco Base 1362 | 17.5 | Sulfurized lard/olefin with excellent oil solubility |
| Sul-Perm 18 | 17.5 | Sulfurized sperm oil replacement |
| Mayco Base 1217LV | 17 | Sulfurized lard/ester for compounding metalworking oils |
| Mayco Base 1214G | 16.5 | High-viscosity sulfurized lard oil for pipe threading and forming operations |
High Active Sulfur Technologies
High sulfur-content technologies designed for severe-duty machining and metal forming operations requiring maximum EP performance.
| Product | Sulfur % | Active Sulfur % | Key Characteristics |
|---|---|---|---|
| Base 401 | 39 | 22 | Sulfurized hydrocarbon with high active sulfur content |
| Mayco Base 1535 | 31 | 20 | High active sulfur content with excellent base oil solubility |
| Mayco Base 1540 | 38.5 | 27 | Highest sulfur content product for severe-duty EP performance |
Selecting the Right Sulfur Technology
Selecting the appropriate sulfur technology depends on the metal being machined, operation severity, stain requirements, formulation type, and the desired balance of extreme pressure performance and lubricity. Dover's portfolio includes active and inactive sulfur chemistries, sulfurized esters, sulfurized oils, sulfurized hydrocarbons, and specialty blends that can be selected based on metal compatibility, sulfur activity, and application-specific performance requirements. The guide below provides a starting point for selecting the appropriate sulfur technology based on common machining applications and formulation objectives.
| If You Need To… | Consider… |
|---|---|
| Machine copper, brass, bronze, or aluminum | Non-Staining Sulfurized Esters & Oils |
| Improve lubricity and surface finish | Sulfurized Esters & Oils |
| Machine stainless steel or exotic alloys | Active Sulfur Technologies |
| Support drilling and tapping operations | Active Sulfur Technologies |
| Improve metal forming performance | High Sulfur Hydrocarbons |
| Maximize EP performance | Active Sulfur Technologies |
| Balance lubricity and EP performance | Sulfurized Esters & Oils |
| Reduce staining concerns | Non-Staining Sulfur Technologies |
Compliance & Product Advantages
Dover's sulfurized additive portfolio includes active and inactive sulfur technologies designed to support diverse metalworking fluid formulations and performance objectives. Multiple sulfur levels, viscosity profiles, and lubricity characteristics are available to help formulators optimize performance across a wide range of machining and metal forming applications.
Technical Resources & Supporting Documentation
Access technical documentation, product data, and application guidance for Dover's sulfurized extreme pressure additive portfolio. These resources support product selection, formulation development, and metalworking fluid performance optimization.
- Data Sheet
Explore Related Dover Products
Dover offers a broad portfolio of metalworking fluid additives and industrial lubricant technologies designed to support extreme pressure performance, corrosion protection, lubricity enhancement, and formulation flexibility. Many metalworking fluid formulations combine sulfur, phosphorus, corrosion inhibition, and boundary lubrication technologies to achieve balanced performance.