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17-4 PH Stainless Steel Sheet Plate

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17-4 PH Stainless Steel Sheet Plate (AMS 5604 , UNS 17400)

17-4 PH Stainless Steel Sheet Plate also know as AMS 5604 & UNS 17400 is a precipitation-hardening martensitic stainless steel that combines high strength, hardness, and excellent corrosion resistance. The “PH” in 17-4PH stands for “precipitation hardening,” which refers to the heat treatment process used to enhance its mechanical properties. This grade is widely used in applications where both high mechanical strength and good corrosion resistance are required, particularly in industries such as aerospace, chemical processing, and nuclear power. This grade is a combination of chromium, nickel, copper, and other alloying elements, making it a martensitic stainless steel with excellent strength, corrosion resistance, and high-temperature performance.

Available Thickness

3/16″
1/4″
5/16″
3/8″
1/2″
5/8″
3/4
7/8″
1″
1 1/8″
4.8mm
6.3mm
7.9mm
9.5mm
12.7mm
15.9mm
19mm
22.2mm
25.4mm
28.6mm
1 1/4″
1 1/2″
1 3/4″
2″
2 1/4″
2 1/2″
2 3/4″
3″
3 1/2″
4″
31.8mm
38.1mm
44.5mm
50.8mm
57.2mm
63.5mm
69.9mm
76.2mm
88.9mm
101.6mm
17-4ph-stainless-steel-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M
  • ASME SA312 / SA312M

Worldwide Equivalent Grade Table 17-4PH

(USA: AISI, ASTM, UNS)

Country
Standard
Grade
USA
ASTM 
17-4PH
European Union
EN
X5CrNiCuNb16-4
Germany
DIN 
X5CrNiCuNb16-4
France
AFNOR
Z6CNU17-04
United Kingdom
BS
630
Japan
JIS
SUS 630
Russia
GOST
08Х17Н4Г8Н
China
GB/T
0Cr17Ni4Cu4Nb
India
IS
X5CrNiCuNb16-4

Chemical Composition of Stainless Steel 17-4PH

Element
Composition (%)
Carbon (C)
0.08 max
Manganese (Mn)
1.00 max
Silicon (Si)
1.00 max
Chromium (Cr)
11.50-13.50
Nickel (Ni)
0.75 max
Phosphorus (P)
0.04 max
Sulfur (S)
0.03 max

Physical Properties of Stainless Steel 17-4PH

Property
Value
Density
7.8 g/cm³ (0.28 lb/in³)
Melting Point
1400-1450°C (2550-2650°F)
Thermal Conductivity
21.6 W/m·K (15 BTU·in/h·ft²·°F)
Specific Heat Capacity
0.46 J/g·K (0.11 BTU/lb·°F)
Modulus of Elasticity
200 GPa (29,000 ksi)
Thermal Expansion
15.9 µm/m·K (8.8 µin/in·°F)
Electrical Resistivity
0.072 Ω·mm²/m (72 µΩ·cm)

Mechanical Properties of Stainless Steel 17-4PH

Property
Value (as heat-treated)
Tensile Strength
1,100-1,300 MPa (160-190 ksi)
Yield Strength
1,000 MPa (145 ksi)
Elongation
4-10%
Hardness (Rockwell C)
36-40 HRC

Fabrication Data

  • Machining: 17-4PH can be machined in the solution-treated condition. Post-aging hardening will make machining more challenging. Use sharp tools and proper cutting fluids.
  • Welding: Welding is generally not recommended due to the risk of reduced mechanical properties. If welding is necessary, preheat and post-weld heat treatment may be required to restore properties.
  • Forming: Cold working can be performed, but the material should be in the solution-treated condition. Extensive cold working may require subsequent heat treatment to achieve desired properties.
  • Heat Treatment: For achieving specific mechanical properties, heat treatment must be strictly controlled. The specific aging treatment will affect the hardness and strength.

Heat Treatment

The heat treatment process for 17-4 PH involves:

  • Solution Annealing: Heating to a high temperature (1500-1700°F) followed by rapid cooling to create a uniform microstructure.
  • Aging: Heating to a lower temperature (900-1100°F) for an extended period to induce precipitation hardening.

Conclusion

17-4 PH stainless steel is a versatile alloy that offers a unique combination of strength, corrosion resistance, and toughness. Its wide range of applications and ease of fabrication make it a valuable material in various industries.

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