Stainless Steel Plate

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

Alloy 17-4PH is a precipitation hardening martensitic stainless steel with Cu and Nb/Cb additions. The grade combines high strength, hardness (up to 572°F /300°C), and corrosion resistance. Mechanical properties can be optimized with heat treatment. Very high yield strength up to 1100-1300 MPa (160-190 ksi) can be achieved.

Specification Sheet Overview

for Alloy 17-4PH (UNS S17400)
W. Nr. 1.4542 Type 630:
A Precipitation-Hardening Martensitic Stainless with High Strength and Hardness and Good Corrosion Resistance

Stainless Steel Plate

General Properties

Alloy 17-4PH (UNS S17400), Type 630, is a chromium-nickel-copper precipitation-hardening martensitic stainless steel with an addition of niobium. 17-4PH combines high strength and hardness with good corrosion resistance.

The alloy is furnished in the solution annealed condition (Condition A). It should not be used at temperatures above 572°F (300°C) or for cryogenic service. Optimal mechanical properties can be obtained by subjecting the alloy to age hardening heat treatments. Heat treatment in the 900°F (482°C) range produces the highest strength.

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 can be easily welded and processed by standard shop fabrication practices. It is magnetic.


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
    equipment

Standards

ASTM........A 693
ASME........SA 693
AMS..........5604

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.

Chemical Analysis

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

Physical Properties (Condition A)

Density

0.280 lbs/in3
7.75 g/cm3

Specific Heat

0.11 BTU/lb-°F @ 70°F)
460 J/kg-°C @ 20°C)

Modulus of Elasticity

28.5 x 106 psi
196 GPa

 

Thermal Conductivity 212°F (100°C)

10.6 BTU/hr/ft2/ft/°F
18.3 W/m-°K

Melting Range

2560 – 2625°F
1404 – 1440°C

Electrical Resistivity

29.5 Microhm-in at 75°C
75 Microhm-cm at 24°C
Mean Coefficient of Thermal Expansion
Temperature Range  
°F °C in/in °F cm/cm °C
70-800 21-427 6.3 x 10-6 11.3 x 10-6

 

Mechanical Properties

Heat Treatment in the 900°F (482°C) range produces the highest strength.

Table 1

Condition 0.2% Offset
Yield Strength
(ksi)
Tensile
Strength
(ksi)
Elongation
in 2 in.
(%)
Reduction
of Area
(%)

Hardness
(Rc)
Charpy V-Notch
Impact Strength
(ft-lb.)
H900 198 183 15 52 44 16
H1025 168 162 16 58 38 40
H1075 164 148 17 59 36 45
H1150 144 126 20 60 33 55
H1150M 123 87 22 66 29 100
H1150D 150 110 20 60 29 50

Fabrication Data

Alloy 17-4PH can be easily welded and processed by standard shop fabrication practices. It is magnetic.

Heat Treatment

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

Cold Forming

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.

Hot Forming

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.

Machining

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.

Cutting

Thermal cutting operations such as plasma cutting should be avoided. Mechanical cutting operations such as bandsaw, abrasive waterjet, shearing and machining are preferred.

Welding

Alloy 17-4PH can be readily welded by most standard processes including SMAW, GTAW, PAW and GMAW.

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.

Associations and Accreditations

ASME
Metals Service Center Institute Member 2016
NIAC
SSINA
Quality System Certificate
Pennsylvania Prosperity Project
Proud Member of National Association of Manufacturers