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Product Overview
Titanium Grade 12 washers are corrosion-resistant fastener components manufactured from a titanium alloy containing 0.3% molybdenum and 0.8% nickel (UNS R53400). This alloy, conforming to ASTM B265 and ASTM B381, offers enhanced resistance to crevice corrosion and improved strength over commercially pure titanium grades. Titanium Grade 12 washers are widely specified for use in aggressive chemical environments, including hot brine, chlorides, and mildly reducing acids, where both mechanical durability and long-term corrosion resistance are critical.
With a minimum tensile strength of 483 MPa and excellent weldability, Titanium Grade 12 washers are the preferred choice for flange assemblies, pressure vessels, and heat exchangers in the chemical processing, desalination, and marine industries. Their unique alloying additions make them suitable for applications where Grade 2 or Grade 7 titanium would be insufficient.
| Material | Titanium Grade 12 |
| UNS Number | R53400 |
| DIN Number | 3.7105 |
| Material Standard | ASTM B265 / ASTM B381 |
| Washer Standard (Metric) | DIN 125 / DIN 127 / ISO 7089 |
| Washer Standard (Inch) | ASME B18.22.1 |
| Type | Flat, Spring, Tab, Serrated |
| Diameter Range | M3-M64 / 1/8"-2½" |
| Tensile Strength | 483 MPa (70 ksi) min |
| Yield Strength | 345 MPa (50 ksi) min |
| Hardness | Max 225 HB |
Complete the Fastener Set
Technical Data
| Size (M) | Inner Ø (mm) | Outer Ø (mm) | Thickness (mm) |
|---|---|---|---|
| M3 | 3.2 | 7 | 0.5 |
| M6 | 6.4 | 12 | 1.6 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M12 | 13.0 | 24 | 2.5 |
| M16 | 17.0 | 30 | 3.0 |
| M20 | 21.0 | 37 | 3.0 |
| M24 | 25.0 | 44 | 4.0 |
| M30 | 31.0 | 56 | 4.0 |
| M36 | 37.0 | 66 | 5.0 |
| M42 | 43.0 | 78 | 6.0 |
| M48 | 49.0 | 92 | 6.0 |
| M56 | 57.0 | 105 | 8.0 |
| M64 | 65.0 | 115 | 8.0 |
| Standard | Covers | Type |
|---|---|---|
| DIN 125 | Flat washers | Metric |
| DIN 127 | Spring lock washers | Metric |
| ISO 7089 | Plain washers | Metric |
| ASME B18.22.1 | Plain & lock washers | Inch |
| ISO 7090 | Chamfered washers | Metric |
| DIN 7989 | Heavy-duty washers | Metric |
| Material Standard | Requirement |
|---|---|
| ASTM B265 | Plate/sheet - Grade 12 |
| ASTM B381 | Forged washers - Grade 12 |
| ASME SB-265 | Plate/sheet - Grade 12 |
| EN 10204 3.1 | Mill test certificate |
| EN 10204 3.2 | TPI-witnessed MTC |
Material Chemistry
| Element | Composition (%) |
|---|---|
| Titanium (Ti) | Balance |
| Nickel (Ni) | 0.6-0.9 |
| Molybdenum (Mo) | 0.2-0.4 |
| Iron (Fe) | 0.3 max |
| Carbon (C) | 0.08 max |
| Nitrogen (N) | 0.03 max |
| Oxygen (O) | 0.25 max |
| Hydrogen (H) | 0.015 max |
Fastener Performance
| Bolt Size | Recommended Washer OD (mm) | Recommended Thickness (mm) |
|---|---|---|
| M8 | 16 | 1.6 |
| M12 | 24 | 2.5 |
| M16 | 30 | 3.0 |
| M20 | 37 | 3.0 |
| M24 | 44 | 4.0 |
| M30 | 56 | 4.0 |
| M36 | 66 | 5.0 |
| M42 | 78 | 6.0 |
Industry Applications
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