Tiếng Việt
DuPont Vespel SP-211 has a lower coefficient of friction than SP-21 without lubrication in various applications. Vespel SP-211 offers excellent wear resistance up to 300˚F (149˚C). Available as custom parts or stock shapes.
DuPont Vespel SP-211 is available as isostatically molded billet and unidirectionally pressed slab specified as Type II, Class 3M and Type II, Class 3P respectively per ASTM 6456-10 / MIL-R-46198. Vespel® SP-211 is specified as Class 4 per AMS 3644G.
DUPONT VESPEL SP-211 IS WIDELY USED FOR:
- Sliding and linear bearings
- Bushings
- Thrust washers
- Seal rings
PERFORMANCE CHARACTERISTICS:
- Low wear at high bearing PVs
- Low coefficient of friction
- Superior unlubricated wear
- Excellent creep resistance
- Wear resistant up to 300°F (149°C)
- Good tensile strength, elongation, and flexural modulus
STANDARD SIZES
Dimensions: 10 in x 10 in
Thickness: 0.125 in – 2 in
Outside Diameter: 0.250 in – 6 in
OPTIONS AVAILABLE
COLOR Dark Brown
GRADES Graphite/PTFE Filled
Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Vespel® SP-21 is also available in bar.
TYPICAL PROPERTIES OF DUPONT VESPEL SP-211 POLYIMIDE
| ASTM Method |
Units | SP-211 15% Graphite and 10% PTFE |
|
|---|---|---|---|
| Mechanical | |||
| Tensile strength 23°C (73°F) |
D1708 / D638 | MPa (kpsi) | 44.8 (6.5) |
| Tensile strength 260°C (500°F) |
D1708 / D638 | MPa (kpsi) | 24.1 (3.5) |
| Elongation at break 23°C (73°F) |
D1708 / D638 | % | 3.5 |
| Elongation at break 260°C (500°F) |
D1708 / D638 | % | 3.0 |
| Flexural modulus 23°C (73°F) |
D790 | MPa (kpsi) | 3,100 (450) |
| Flexural modulus 260°C (500°F) |
D790 | MPa (kpsi) | 1,380 (200) |
| Compressive stress at 10% strain, 23°C (73°F) |
D695 | MPa (kpsi) | 102 (14.8) |
| Deformation under 13.8 MPa (2,000 psi) load |
D621 | % | 0.13 |
| Friction | |||
| Coefficient of friction at PV = .875 MPa m/s (25,000 psi-ft/min)* |
0.12 | ||
| Coefficient of friction at PV = 3.5 MPa m/s (25,000 psi-ft/min)* |
0.08 | ||
| Static coefficient of friction in air* |
0.20 | ||
| PV limit (unlubricated)** | MPa-m/s (kpsi ft/min) |
3.5 (100) |
|
| Other Properties | |||
| Coefficient of thermal expansion 23–300°C (73–572°F) |
E831 | µm/m/K (10-6 in/in-°F) |
54 (30) |
| Hardness | D785 | Rockwell E | 1–20 |
| Water absorption 24 hr at 23°C (73°F) |
D570 | % | 0.21 |
Warranty for DuPont Vespel SP-211 products
• Only applies to Dupont products distributed genuine in Vietnam.
• All DuPont Vespel SP-211 products are warranted if the machine fails due to manufacturer fault.
• For warranty and product maintenance, please contact Achilles, customer service phone number:Ms. Đức 098 469 4884
• Achilles is the genuine supplier of products related to DuPont Vespel SP-211
• For retail/whole sale pricing, bulk ordering and product information advice please contact Ms. Đức 098 469 4884 via info@achilles.com.vn or the website https://achilles.com/.
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