17-4PH grade stainless steel has high ductility and by using all conventional techniques it can be formed. Stainless steel 17-4PH is stronger than the regular stainless steel due to which powerful equipment’s are required for forming it and during cold working heavy duty lubricants are used. It produces the highest strength at the range of 900°F in the heat treatment.
Percentage composition EN 10095−1999
| Fe | With | Si | Mn | P | S | Cr | Ni | Cb + Ta | Cu |
|---|---|---|---|---|---|---|---|---|---|
| Fe | With | Si | Mn | P | S | Cr | Ni | Cb + Ta | Cu |
| basis | ≤0,07 | ≤1 | ≤1 | ≤0,04 | ≤0,05 | 15−17 | 3−5 | 5 X C / 0.45 | 3−5 |
Mechanical properties (20°C)
blower SB — the ultimate short-term strength (ksi) 190
sT is the yield strength for permanent deformation (ksi) 170
d5 — elongation at break.10%
Cold treatment
Turning, milling, grinding, drilling.
Characteristics of 1.4542
| annealed | specification values |
| tensile strength Rm | 1000-1100 MPa |
| elongation A | 5 - 8 |
| Aged at 480 ⁰C | specification values |
| tensile strength Rm | 1150 – 1350 MPa |
| elongation A | 7 - 15 |
Heat treatment
Alloy 17-4PH is provided in the solution-annealed condition (Condition A). Mechanical properties may be improved by subsequent age hardening treatments. These aging treatments are commonly described as conditions H900, H1025, H1075, H1150, H1150M and H1150D.
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