17-4PH
2017-12-09 16:22:13
17-4PH is martensitic precipitation hardening stainless steel. 17-4PH performance characteristic is easy to adjust the strength level, can be adjusted by changes in heat treatment process. Martensite phase transformation and aging treatment of metal forming precipitation hardening phase is the main reinforcement method, 17-4PH attenuation performance is good, strong corrosion fatigue resistance and water resistance.
Steel Grade: 17-4PH | Equivalently UNS: S17400 | Type: Precipitation-Hardening
C(%)≤ : 0.07
Si(%)≤ : 1.00
Mn(%)≤ : 1.00
P(%)≤ : 0.04
S(%)≤ : 0.03
Cr(%)≤ : 15.5～17.5
Ni(%)≤ : 3.00～5.00
Mo(%)≤ : —
Other(%) : Cu3.00～5.00 Nb0.15～0.45
MECHANICAL PROPERTIES
Tensile Strength|σb/MPa: 480℃, ≥1310; 550℃, ≥1060; 580℃, ≥1000; 620℃, ≥930
Yield Strength|σ0.2/MPa: 480℃, ≥1180; 550℃, ≥1000; 580℃, ≥865; 620℃, ≥725
Extensibility|δ(%): 480℃,≥10; 550℃, ≥12; 580℃, ≥13; 620℃, ≥16
Reduction of Area|ψ(%): 480℃,≥40; 550℃,≥45; 580℃,≥45; 620℃,≥50
Corrosion Resistance
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.
Applications
• Aerospace — structural and parts
• Biomedical — hand tools
• Chemical Processing
• Food Process Equipment
• Gate Valves
• Mechanical Components
• Nuclear Waste Processing and Storage
• Oil and Gas Production — foils, helicopter deck platforms, etc.
• Pulp and Paper — paper mill Applications
Please check this attached for sheet data
Applications
• Aerospace — structural and parts
• Biomedical — hand tools
• Chemical Processing
• Food Process Equipment
• Gate Valves
• Mechanical Components
• Nuclear Waste Processing and Storage
• Oil and Gas Production — foils, helicopter deck platforms, etc.
• Pulp and Paper — paper mill Applications
Please check this attached for sheet data
