MOLYKOTE P37
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- -30 to 1400 deg C Threaded-Connection Lubrication
- 5,500 N Four-Ball Weld Load
- Graphite/Zirconium-Dioxide High-Purity Paste
Product Description
MOLYKOTE® P-37 Antiseize Paste is a gray-black, mineral-oil-based solid-lubricant paste for high-temperature bolted joints. Formulated with graphite and zirconium dioxide, it provides load-carrying capability and seizure protection for screws, nuts, and bolts made from heat-resistant and extremely heat-resistant steels, including nickel-based alloys. The paste supports assembly and later dismantling of threaded connections exposed to prolonged high temperatures and has been used on gas- and steam-turbine bolted joints in power stations. Its solid-lubricant system is temperature resistant from −30°C to 1,400°C, while low sulfur and total-halogen limits support use where lubricant purity is important.
Key features
- Extreme-temperature capability: The solid-lubricant system is temperature resistant from −30°C to 1,400°C.
- Seizure protection: Helps prevent seizure and supports removal of threaded fasteners after extended high-temperature exposure.
- High load-carrying performance: Provides a typical four-ball weld load of 5,500 N.
- High-purity formulation: Limits sulfur to 250 ppm maximum and total halogens, including chlorine, to 200 ppm maximum.
- Low seepage: Suitable for applications where cleanliness around the lubricated connection is important.
- High-temperature material stability: Does not include components identified by the supplier as becoming brittle at elevated temperatures.
Applications / Suitable for
- High-temperature screws, nuts, and bolts
- Threaded connections made from heat-resistant steels
- Nickel-alloy fasteners and other extremely heat-resistant alloys
- Gas-turbine bolted joints
- Steam-turbine bolted joints
- Power-generation assembly and maintenance operations
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
Typical as-supplied characteristics and storage information for MOLYKOTE® P-37 Antiseize Paste. Values are not intended as specification limits.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product type | Anti-seize solid-lubricant paste | — | For high-temperature threaded connections |
| Base-oil technology | Mineral oil | — | Supplier-listed composition |
| Solid lubricants | Graphite and zirconium dioxide | — | Current DuPont product details |
| Appearance | Gray-black | — | Typical property |
| NLGI grade | 1–2 | — | Supplier product classification |
| Unworked penetration | 280–310 | 0.1 mm | ISO 2137 |
| Density | 1.21 | g/cm³ | ISO 2811 at 20°C |
| Total halogen content | ≤200 | ppm | Maximum; includes chlorine |
| Sulfur content | ≤250 | ppm | Maximum |
| Usable life | 60 | months | Original unopened container stored from 0°C to 35°C |
After-application / in-service properties
Typical performance characteristics of the applied paste under the stated laboratory and bolted-joint test conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Solid-lubricant temperature resistance | −30 to 1,400 | °C | Temperature resistance of the solid-lubricant system |
| Four-ball weld load | 5,500 | N | DIN 51350-4; 1,450 rpm for 1 minute |
| Four-ball wear scar | 1.50 | mm | DIN 51350-5; 1,450 rpm, 800 N, 1 hour |
| Thread coefficient of friction | 0.11 | μ | M12 × 1.75, property class 8.8, blackened |
| Under-head coefficient of friction | 0.11 | μ | M12 × 1.75, property class 8.8, blackened |
| Tightening torque | 49.4 | N·m | 21CrMoNiV57 bolts; 600°C for 21 hours |
| Breakaway torque | 120.9 | N·m | 21CrMoNiV57 bolts; 600°C for 21 hours |
| Tightening torque | 49.4 | N·m | Nimonic NiCr20TiAl fasteners; 850°C for 4 weeks |
| Breakaway torque | 102.4 | N·m | Nimonic NiCr20TiAl fasteners; 850°C for 4 weeks |
