17-4 PH Pan Head Screws
17-4 PH Pan Head Screws
17-4 PH pan head screws are made from a precipitation hardened stainless steel most known for its exceptional strength and its ability to maintain its mechanical properties to 600°F. Compared to 316 stainless steel, 17-4 PH screws yield strength is up over 4 times greater. When compared to Duplex 2205 screws, the yield strength of 17-4 PH can be up to 2-½ times greater.
17-4 pan head screws are available in 8 different aged (precipitation hardened) conditions offering a variety of mechanical properties.
An extremely strong precipitation hardened stainless steel
· Well suited for high strength applciaitons
· Up to 4x stronger than 316 stainless steel
· Maintains its mechanical strength up to 600°F
· 17-4PH Chemistry & Specifications
· 17-4PH pan head screw features and benefits
· 17-4PH Datasheet
Resources: 17-4PH Torque Specs
17-4 PH Screw Types: 12 Point Screws, Button Head Cap Screws, Flat Head Screws, Hex Cap Screws, Pan Head Screws, Set Screws, Socket Head Cap Screws, Tamper Resistant Security Screws, Torx Screws, Vented Screws
17-4PH Pan Head Screw Features and Benefits
Pan head screws are flat on top and rounded on the sides. 17-4PH pan head screws are ideal for:
· Small diameter fasteners – especially when the fastener size needed is too small for a wrench.
· When phillips or slotted drivers are desired. For many high strength specialty alloys, only slotted drives are available.
· Low torque applications because the drivers don’t offer as much force as a wrench.
· Large diameter head provides more clamping area.
How Are They Different from Button Head Screws?
17-4 PH pan head and button head screws have very similar profiles however, button head screws allow for a hex socket driver whereas pan head screws do not.
17-4PH Chemistry & Specifications
17-4PH Specifications: UNS S17400, AISI 630, ASTM A564-630, Werkstoff 1.4542, AMS 5604 Sheet, Strip and Plate, ASTM A 693 Plate
17-4PH | Fe | Cr | Ni | Cu | Mn | Si | Mo | Nb+Ta | C | P | S |
Min% |
| 15.0 | 3.0 | 3.0 | - | - | - | - | - | - | - |
Max% | Bal | 17.5 | 5.0 | 5.0 | 1.0 | 1.0 | 0.50 | 0.45 | 0.07 | 0.04 | 0.03 |
ASTM F593, Grade 630
This specification covers seven groups of stainless steel alloys, with ASTM F593, Grade 630 applying 17-4PH. ASTM F593 Grade 630 covers the requirements for 17-4PH stainless steel bolts, hex cap screws, and studs sized 0.25 to 1.50 inches, inclusive, in nominal diameter. It is intended for common use and for service applications requiring general corrosion resistance.
| Full-Size Tests | Machined Specimen Tests |
Stainless Steel Alloy Group | Condition | Alloy Mechanical Property Marking | Nominal Diameter (inches) | Tensile Strength (ksi) | Yield Strength (ksi) | Rockwell Hardness | Tensile Strength (ksi) | Yield Strength | Elongation % |
7(630) | AH | F593U | 1/4 to 1.5 IN | 135 to 170 | 105 | C28 to38 | 135 | 105 | 16 |
Common 17-4 Fastener Conditions: Aged Conditions vs Tensile Strength
Aged Condition | Ultimate Tensile (ksi) | Yield Strength at 0.2% Offset (ksi) | Elongation % | Hardness Rc |
H900 | 200 | 185 | 14 | 40-47 |
H925 | 190 | 175 | 14 | 38-45 |
H1025 | 170 | 165 | 15 | 35-42 |
H1075 | 165 | 150 | 16 | 33-39 |
H1100 | 150 | 135 | 17 | 32-38 |
H115C | 145 | 125 | 19 | 28-37 |
H1150-M | 125 | 85 | 22 | 26-36 |
Annealed | 160 | 145 | 5 | ~35 |