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Steel_15-5PH_mmpds
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7/14/2019 Steel_15-5PH_mmpds
http://slidepdf.com/reader/full/steel15-5phmmpds 1/16
MMPDS-04
1 April 2008
2-173
Specification Form
AMS 5659 Bar, forging, ring, and extrusion
AMS 5862 Sheet, strip, and plate
AMS 5400 Investment casting
2.6.7 15-5PH
2.6.7.0 Comments and Properties — 15-5PH is a precipitation-hardening, martensitic stainless
steel used for parts requiring corrosion resistance and high strength at temperatures up to 600(F. Alloy 15-5PH
has good transverse ductility and strength in large section sizes. This material is supplied in either the annealedor overaged condition and is heat-treated after fabrication. These parts should never be used in Condition A.
When good fracture toughness or impact properties are required, both at or below room temperature, conditions
H900 and H925 should not be used. Conditions H1025, H1075, H1100, and H1150 provide lower transition
temperatures and more useful levels of fracture toughness than the H900 and H925 conditions. The H1150M
condition has the best notch toughness and is recommended for cryogenic applications.
Manufacturing Considerations — 15-5PH is readily forged and welded. Forging procedures are
similar to those used for 17-4PH, the forgeability of 15-5PH being superior to that of 17-4PH in critical types
of upset-forging and hot-flattening operations. Machining in the solution-treated condition is done at rates
similar to Type 304 and 60 percent of these rates work well for Condition H900. Highest machining rates are
possible with Conditions H1150 and H1150M. Material which is hot-worked must be solution-treated before
hardening. A dimensional contraction of 0.0004 to 0.0006 and 0.0008 to 0.0010 in./in. will occur on hardeningto the H900 and H1150 conditions, respectively.
Heat Treatment — 15-5PH must be used in the heat-treated condition and should not be placed in
service in Condition A. The alloy can be heat-treated to various strength levels having a wide range of
properties. Consult the applicable material specification or AMS-H-6875 for specific heat-treatment
procedures.
Environmental Considerations — The corrosion resistance of 15-5PH is comparable to that of
17-4PH. For tensile applications where stress corrosion is a possibility, 15-5PH should be aged at the highest
temperature compatible with strength requirements and at a temperature not lower than 1025(F for 4 hours
minimum aging time.
Specifications and Properties — Material specifications for 15-5PH are presented in Table 2.6.7.0(a).
Room temperature mechanical and physical properties of 15-5PH are shown in Tables 2.6.7.0(b) through
2.6.7.0(d). The effect of temperature on physical properties is depicted in Figure 2.6.7.0.
Table 2.6.7.0(a). Material Specifications for 15-5PH Stainless Steel
7/14/2019 Steel_15-5PH_mmpds
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MMPDS-04
1 April 2008
2-174
Table 2.6.7.0(b). Design Mechanical and Physical Properties of 15-5PH Stainless Steel
Bar and Forging
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7/14/2019 Steel_15-5PH_mmpds
http://slidepdf.com/reader/full/steel15-5phmmpds 3/16
MMPDS-04
1 April 2008
2-175
Table 2.6.7.0(c). Design Mechanical and Physical Properties of 15-5PH Stainless SteelPlate
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aa TThhee HH990000,, HH992255,, HH11007755,, HH11110000,, aanndd HH11115500 ccoonnddiittiioonnss aarree iinncclluuddeedd iinn AAMMSS 55886622..bb BBeeaarriinngg vvaalluueess aarree ““ddrry y ppiinn”” vvaalluueess ppeerr SSeeccttiioonn 11..44..77..11..
7/14/2019 Steel_15-5PH_mmpds
http://slidepdf.com/reader/full/steel15-5phmmpds 4/16
MMPDS-04
1 April 2008
2-176
Table 2.6.7.0(d). Design Mechanical and Physical Properties of 15-5PH Stainless SteelInvestment Casting
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7/14/2019 Steel_15-5PH_mmpds
http://slidepdf.com/reader/full/steel15-5phmmpds 5/16
MMPDS-04
1 April 2008
2-177
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. $ W L Q G L F D W H G W H P S H U D W X U H
Figure 2.6.7.0. Effect of temperature on the physical properties of 15-5PH stainlesssteel.
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Temperature, F
-400 -200 0 200 400 600 800 1000
P e r c e n t a g e o f
R o o m
T e m p e r a t u r e S t r e n g t h
0
20
40
60
80
100
120
140
160
180
200
Fty
Ftu
Strength at temperatureExposure up to ½ hr
Figure 2.6.7.1.1. Effect of temperature on the tensile ultimate strength (Ftu) and thetensile yield strength (Fty ) of 15-5PH (H925, H1025, and H1100) stainless steel bar.
2.6.7.1 Various Heat-Treated Conditions —— EElleevvaatteedd tteemmppeerraattuurree ccuurrvveess ff oorr tthhee vvaarriioouussmmeecchhaanniiccaall pprrooppeerrttiieess aarree sshhoowwnn iinn FFiigguurreess 22..66..77..11..11 aanndd 22..66..77..11..44.. TTy yppiiccaall ssttrreessss--ssttrraaiinn aanndd ttaannggeenntt--mmoodduulluuss
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7 H P S H U D W X U H )
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Figure 2.6.7.1.4. Effect of temperature on the tensile and compressive moduli (E and Ec)of 15-5PH stainless steel.
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Figure 2.6.7.1.6(b). Typical compressive stress-strain and compressive tangent-modulus curves at room temperature for various heat-treated conditions of 15-5PH
stainless steel bar.
Strain, 0.001 in./in.0 2 4 6 8 10 12
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TYPICAL
Thickness: 1.000-1.250 in.
n (H925) = 13n (H1025) = 24
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n (H1150M) = 7.8
H1025
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H1100
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Figure 2.6.7.1.6(a). Typical tensile stress-strain curves at room temperature for various heat-treated conditions of 15-5PH stainless steel bar.
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Strain, 0.001 in./in.
0 2 4 6 8 10 12
S t r e s s ,
k s i
0
40
80
120
160
200
Compressive Tangent Modulus, 103 ksi0 6 12 18 24 30 36
Ramberg-Osgood
n (Tension) = 12n (Comp.) = 12
TYPICAL
Thickness: 0.500 - 1.875 in.
Compressive
Tensile
Figure 2.6.7.1.6(c). Typical tensile and compressive stress-strain and compressivetangent-modulus curves for 15-5PH (H935) stainless steel casting.
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Temperature, F
0 200 400 600 800 1000 1200 1400 1600
P e r c e n t a g e o f R
o o m T
e m p e r a t u r e F c y
0
20
40
60
80
100
Strength at temperatureExposure up to ½ hr
Figure 2.6.7.2.2. Effect of temperature on the compressive yield strength (Fcy ) of 15-5PH(H1025) stainless steel bar.
Figure 2.6.7.2.6(a). Typical compressive stress-strain and compressive tangent-moduluscurves at various temperatures for 15-5PH (H1025) stainless steel bar.
2.6.7.2 H1025 Condition—
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Strain, 0.001 in./in.
0 2 4 6 8 10 12
S t r e s s ,
k s i
0
40
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160
200
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ksi
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L and LT compression
L and LT-tension
Ramberg-Osgood TYS
n (L-tension) = 23 161n (LT-tension) = 23 161n (L-comp.) = 20 169n (LT-comp.) = 21 169
TYPICAL
Thickness: 1.500 - 5.500 in.
Figure 2.6.7.2.6(b). Typical tensile and compressive stress-strain and compressivetangent-modulus curves for 15-5PH (H1025) stainless steel plate.
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Fatigue Life, Cycles
103 104 105 106 107 108
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MMPDS-04
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2-185
Fatigue Life, Cycles
104 105 106 107 108
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7/14/2019 Steel_15-5PH_mmpds
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MMPDS-04
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Fatigue Life, Cycles
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7/14/2019 Steel_15-5PH_mmpds
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Figure 2.6.7.3.2. Effect of temperature on the compressive yield strength (Fcy ) of15-5PH (H1150) stainless steel bar.
Figure 2.6.7.3.6. Typical compressive stress-strain and tangent-modulus curves at various temperatures for 15-5PH (H1150) stainless steel bar.
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Table 2.6.8.0(a). Material Specification for PH15-7Mo Stainless Steel
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