Percipitation Hardened Stainless Steel 11-10PH / 13-8PH / 15-5PH / 17-4 PH / 17-7PH / 08X14H7M / Custom 450, Custom 465 Products

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17-4 Stainless Steel

SAE Type 630 stainless steel is a type of martensitic precipitation-hardened stainless steel that is more often called 17-4 PH or just 17-4. It is also known as UNS S17400. It has between 15–17.5% chromium, 3–5% nickel, and 3–5%, copper. It gets its name from the fact that it is made up of about 17% chromium and 4% nickel.

17-4 stainless is martensitic stainless steel that gets stronger with age and is also resistant to corrosion. A short, simple, and low-temperature treatment are all it takes to make something harder. 17-4 is much easier to weld than most martensitic stainless steels, like type 410. Because it is strong, doesn’t rust, and is easy to work with, 17-4 stainless can be a cheaper alternative to high-strength carbon steels and other stainless grades.

When the metal is heated to 1900°F for solution treatment, its structure is austenitic, but when it cools to room temperature, its structure changes to a low-carbon martensitic structure. This change won’t be done until the temperature goes down to 90°F. The alloy gets stronger when it is heated to temperatures between 900 and 1150°F for one to four hours. This process of hardening also tempers the martensitic structure, making it more flexible and tough.

Common Trade Names

17-4 Stainless

Applications

Gate Valves
Chemical Processing Equipment
Pump Shafts
Gears
Ball Bearings
Bushings
Fasteners
ASTM AMS ASME
A564 5604 SA564
A693 5622 SA693
A705 5643 SA705
5825

Physical Properties of 17-4

Annealed -H900
Density 0.280 lb/in3 0.282 lb/in3
Ultimate Tenslie Strength 160 ksi 210 ksi
Yield Tensile Strength 145 ksi 200 ksi
Fatigue Strength N/A 98 ksi
Shear Strength N/A 120 ksi
Shear Modulus N/A 11,000 ksi
Hardness Rockwell | Brinell C36 | 363 C40-47 | 388-444
Elongation at Break Percentage 6-15% 12%
Reduction of Area 30-60% 35-40%
Modulus of Elasticity N/A 28,000 ksi
Poisson’s Ratio 0.28 0.28
Machinability Percentage 45% N/A
Melting Point 2,550-2,620 °F 2,550-2,620 °F
Specific Heat 1.1 x 10^-1 BTU/lb-°F 1.1 x 10^-1 BTU/lb-°F
Thermal Conductivity 116 BTU-in/hr-ft^2-°F 116 BTU-in/hr-ft^2-°F
Electrical Conductivity 2.3% IACS 2.3% IACS

Chemistry Information

Element Percentage
C 0.07 max
Cu 3 – 5
Cr 15 – 17.5
Fe 73
Mn 1 max
Nb + Ta 0.15 – 0.45
Nb 0.45 max
Ni 3 – 5
P 0.04 max
S 0.03 max
Si 1 max
Ta 0.45 max

15-5 PH STAINLESS STEEL – AMS 5659

15-5 PH stainless steel is a martensitic precipitation-hardening stainless steel with about 15% Chromium and 5% Nickel. It is very strong, very hard, and resists corrosion very well. A single heat treatment at a low temperature can add more strength. Compared to 17-4 PH, it has better transverse toughness and ductility, better mechanical properties in larger cross-sections, and better forgeability. It is easy to join together. It can be machined in any of the different temperatures that this grade can handle.

Common Trade Names

PH15-5
XM-12
UNS S15500
15Cr-5Ni
DIN X4CrNiCuNb164
X5CrNiCu15-5
DIN 1.4540
DIN 1.4545
SAE 15-5

Applications

Aerospace structural components
Valves
Gears and Shafts
Oil and Gas components
Nuclear reactor components

Chemical Composition:

Carbon 0.07 max
Manganese 1.00 max
Phosphorus 0.040 max
Sulfur 0.030 max
Silicon 1.00 max
Chromium 14.00 – 15.50
Nickel 3.50 – 5.50
Copper 2.50 – 4.50
Columbium plus Tantalum 0.15 – 0.45

Mechanical Properties of 15-5PH

Condition Tensile Yield 0.2% offset Elongation (%in 2″) Reduction of Area Brinell Hardness Rockwell Hardness
Ann 363 Bhn C33
H900 190,000 psi 170,000 psi 6% 15% 388 Bhn C40
H1025 155,000 psi 145,000 psi 8% 27% 331 Bhn C35
H1075 145,000 psi 125,000 psi 9% 28% 311 Bhn C32
H1150 135,000 psi 105,000 psi 11% 30% 277 Bhn C28
H1150-M 115,000 psi 75,000 psi 14% 35% 255 Bhn C25
Stainless steel 15-5PH / 17-4 PH / 17-7PH Rod / Bars

Precipitation Stainless Steel 11-10 PH / 13-8 PH/ 15-5 PH / 17-4 PH / 17-7 PH / Custom 450 and 465 Rod & Bars

Stainless Steel 15-5 PH / 17-4 PH / 17-7 PH Hex Bar

Precipitation Stainless Steel 11-10 PH / 13-8 PH/ 15-5PH / 17-4 PH / 17-7PH Hex Bar/ Custom 450 AND 465 UNS S15500 / S17400 Hex Bar

Stainless Steel 15-5PH / 17-4 PH / 17-7PH Square Bars, UNS S15500 / S17400 Square Bar

Precipitation Stainless Steel 11-10 PH / 13-8 PH / 15-5PH / 17-4 PH / 17-7PH Square Bar / Custom 450 and 465 Square Bar

Stainless Steel 15-5PH / 17-4 PH / 17-7PH Plates/Sheet

Precipitation Stainless Steel 11-10 PH / 13-8 PH / 15-5PH / 17-4 PH / 17-7PH / Custom 450 and 465 Plates/Sheet

Stainless steel 15-5PH / 17-4 PH / 17-7PH Flanges

Precipitation Stainless Steel 11-10 PH / 13-8 PH / 15-5PH / 17-4 PH / 17-7PH / Custom 450 and 465 Flanges

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