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 StainlessApplications
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 15-5Applications
Aerospace structural components Valves Gears and Shafts Oil and Gas components Nuclear reactor componentsChemical 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 |