Sandmeyer Steel Company stocks a large inventory of 17-4PH stainless steel plate in the annealed condition in thicknesses from 3/16" through 3", ready to be processed and shipped to your specific requirements.
Available thicknesses for Alloy 17-4PH:
| 3/16" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 9/16" | 5/8" | 3/4" | 7/8" | 1" |
|---|---|---|---|---|---|---|---|---|---|---|
| 4.8mm | 6.3mm | 7.9mm | 9.5mm | 11.1mm | 12.7mm | 14.3mm | 15.9mm | 19mm | 22.2mm | 25.4mm |
| 1 1/8" | 1 1/4" | 1 1/2" | 1 3/4" | 2" | 2 1/4" | 2 1/2" | 2 3/4" | 3" | 3 1/2" | 4" |
| 28.6mm | 31.8mm | 38.1mm | 44.5mm | 50.8mm | 57.2mm | 63.5mm | 69.9mm | 76.2mm | 88.9mm | 101.6mm |
The corrosion resistance of Alloy 17-4PH is comparable to 304 stainless steel in most environments, and is generally superior to the 400 series stainless steels. It is used in applications where the combination of moderate corrosion resistance and unusually high strength are required. Alloy 17-4PH has corrosion resistance comparable to 304L in some chemical, dairy, food, paper and petroleum applications.
Alloy 17-4PH in the solution-annealed condition (Condition A) should not generally be put in service. The alloy is subject to brittle fractures and more sensitive to chloride stress corrosion cracking than the aged material.
If risks of chloride stress corrosion cracking are present the higher aging temperatures should be selected over 1022°F (550°C), preferably 1094°F (590°C). 1022°F (550°C) is the recommended tempering temperature in chloride service. 1094°F (590°C) is preferred in H2S media.
Alloy 17-4PH is subject to crevice corrosion and pitting attack when exposed to stagnant seawater for a duration of time.
Weight % (all values are maximum unless a range is otherwise indicated)
| Chromium | 15.0 min.-17.5 max. | Phosphorus | 0.04 |
| Nickel | 3.0 min.-5.0 max. | Sulfur | 0.03 |
| Copper | 3.0 min.-5.0 max. | Silicon | 1.0 |
| Carbon | 0.07 | Nobium plus Tantalum | 0.15 min.-0.45 max. |
| Manganese | 1.0 | Iron | Balance |
| Temperature Range | |||
|---|---|---|---|
| °F | °C | in/in °F | cm/cm °C |
| 70-800 | 21-427 | 6.3 x 10-6 | 11.3 x 10-6 |
Room temperature properties (longitudinal direction)
Guaranteed values (ASTM A693 hot rolled plates)
Table 1
| Heat Treatment | Yield Strength 0.2% Offset |
Ultimate Tensile Strength |
Elongation | |||
|---|---|---|---|---|---|---|
| (MPa) | ksi | (MPa) | ksi | % | ||
| Hardening 496 °C (925 °F) 4 h, air cooling |
Min. | 1070 | 155 | 1170 | 170 | 8 |
| Typ. | 1207 | 175 | 1310 | 190 | 14 | |
| Hardening 593 °C (1100°F) 4 h, air cooling |
Min. | 790 | 115 | 965 | 140 | 10 |
| Typ. | 931 | 135 | 1034 | 150 | 17 | |
Alloy 17-4PH can be easily welded and processed by standard shop fabrication practices. It is magnetic.
Alloy 17-4PH is provided in the solution-annealed condition (Condition A). Mechanical properties may be altered by subsequent age hardening treatments. These aging treatments are referred to as Conditions H900, H1025, H1075, H1150, H1150M and H1150D. The processes are outlined in Table 2 below. The resultant mechanical properties appear above in Table 1.
Table 2
| CONDITION | Temperature °F | Time, h | Quench |
|---|---|---|---|
| H900 | 900 | 4 | Air Cool |
| H1025 | 1025 | 4 | Air Cool |
| H1075 | 1075 | 4 | Air Cool |
| H1150 | 1150 | 4 | Air Cool |
| H1150M | 1400 for 2 h, air cool plus 1150 for 4 h, air cool | ||
| H1150D | 1400 for 2 h, air cool plus 1150 for 4 h, air cool | ||
Alloy 17-4PH has limited cold forming properties. Cold forming can only be undertaken on plates in the fully annealed condition. Stress corrosion resistance is enhanced by re-aging at the precipitation hardening temperature after cold working.
Heat uniformly at 1742 – 2192°F (950 – 1200°C). A full solution anneal, cooling lower than 76°F (25°C) and aging at the required temperature must occur after hot forming. The post forming heat treatment should be a function of the desired mechanical properties.
Alloy 17-4PH can be machined in both the solution treated and precipitation hardened conditions. Machining characteristics may vary according to the hardness of the metal. High speed tools are acceptable, but carbide tools are preferred. Standard lubrication should be used. Dimensional changes as a result heat treatment should be taken into account if very stringent tolerances are required.
Thermal cutting operations such as plasma cutting should be avoided. Mechanical cutting operations such as bandsaw, abrasive waterjet, shearing and machining are preferred.
Alloy 17-4PH can be readily welded by most standard processes including SMAW, GTAW, PAW and GMAW.
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