17-4 PH stands out as a martensitic grade stainless steel renowned for its robustness. The alloy composition of 17-4 PH Stainless Steel Fasteners comprises a significant proportion of chromium, complemented by nickel and copper. This martensitic stainless steel grade derives its strength from the precipitation of these key elements, further enhanced by the addition of trace amounts of niobium. The 17-4 PH Socket Head Cap Screw exhibits a remarkable range of toughness and strength properties, contingent upon the aging or precipitation temperature applied to fortify the alloy.
17-4 PH Stainless Steel Fasteners boast an array of advantages, with standout resilience derived from their martensitic grade composition. The alloy makeup of 17-4 PH includes a significant chromium content, supplemented by nickel and copper. This martensitic stainless steel grade achieves its robustness through the precipitation of these core elements, further reinforced by the addition of trace niobium.
Prominently, 17-4 PH fasteners excel in corrosion resistance, making them particularly adept for environments prone to corrosion, such as those near water bodies or saltwater pools. Additionally, their impressive tensile strength ensures they are indispensable in heavy-duty industrial applications where sturdy connections are paramount for operational reliability. The versatility of 17-4 PH fasteners extends to achieving a wide range of toughness and strength properties, contingent upon the aging or precipitation temperature applied to the alloy.
Standard SS 17-4-Ph Fasteners specifications as per Fasteners manufacturers.
| Material | Stainless Steel 17-4 PH |
| Specification | IS/BS/ASTM |
| Standards | ASTM / ASME - A/ SA 193 |
| Size | 3 mm to 200 mm |
| Length | M02 to M30 |
Each SS 17-4-Ph Fasteners have unique design each of them are used in specific applications. Some of them are mentioned below.
Note that this chart includes only some of the most common sizes of SS 17-4-Ph Bolt. There are many other sizes available as well, and some applications may require custom sizes or special configurations.
Chromium (Cr)
15.0 - 17.5%
Nickel (Ni)
3.0 - 5.0%
Copper (Cu)
3.0 - 5.0%
Manganese (Mn)
≤1.0%
Silicon (Si)
≤1.0%
Columbium + Tantalum (Cb+Ta)
0.15 - 0.45%
Carbon (C)
≤0.07%
Phosphorus (P)
≤0.04%
Sulfur (S)
≤0.03%
Iron (Fe)
Balance
| Density | 7.8 g/cm³ (0.282 lb/in³) |
| Melting Point | 2560 - 2625°F (1404 - 1440°C) |
| Tensile Strength | 1100 - 1300 MPa (160 - 190 ksi) |
| Yield Strength (0.2%Offset) | 1000 - 1200 MPa (145 - 175 ksi) |
| Elongation | 10 - 14% |
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