17-4PH
17-4PH properties and heat treatment forged piece, Including 17-4PH application and specifications, We have all specifications，Including 17-4PH steel plate, 17-4PH sheet, 17-4PH square steel, 17-4PH flat bar,17-4PH round bar,17-4PH forgings, we can own production and sales.
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We can produce the 17-4PH has the following specifications:
Round bar steel: 1mm to 3000mm
Square-shape steel: 1mm to 2000mm
Plate steel:0.1mm to 2500mm
Width: 10mm to 2500mm
Lenth: We can supply any lenth based on the customer's requirement.
Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes
Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.
Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement
Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement
Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.
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Chemical composition % of the ladle analysis of grade 17-4PH and Standards
Precipitation Hardening
Alloy 17-4ph
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.
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.
General Properties
Alloy 17-4 PH 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.
The grade should not be used at temperatures above 572°F (300°C) or at very low temperatures. It has adequate resistance to atmospheric corrosion or in diluted acids or salts where its corrosion resistance is equivalent to Alloy 304 or 430.
Applications
- Offshore (foils, helicopter deck platforms, etc.)
- Food industry
- Pulp and paper industry
- Aerospace (turbine blades, etc.)
- Mechanical components
- Nuclear waste casks
Standards
ASTM.....................A693 grade 630 (AMS 5604B) UNS S17400
EURONORM...........1.4542 X5CrNiCuNb 16-4
AFNOR...................Z5 CNU 17-4ph
DIN.........................1.4542
Corrosion Resistance
Alloy 17-4 PH withstands corrosive attacks better than any of the Standard hardenable stainless steels and is comparable to Alloy 304 in most media.
If there are potential risks of stress corrosion cracking, the higher aging temperatures then must be selected over 1022°F (550°C), preferably 1094°F (590°C). 1022°F (550°C) is the optimum tempering temperature in chloride media.
1094°F (590°C) is the optimum tempering temperature in H2S media.
The alloy is subject to crevice or pitting attack if exposed to stagnant seawater for any length of time.
It is corrosion resistant in some chemical, petroleum, paper, dairy and food processing industries (equivalent to 304L grade).
Typical values (Weight %)
| C | Cr | Ni | Cu | Nb/Cb | Mn |
| 0.04 | 16.5 | 4.5 | 3.3 | 0.3 | 0.7 |
| PREN (%Cr+3.3%Mo+16%N) ≥17 | |||||
Mechanical Properties
Room temperature properties (longitudinal direction)
Guaranteed values (ASTM A693 hot rolled plates); thickness from 3/16" up to 3".
| Heat treatment |
YS 0.2% N/mm |
UTS N/mm |
YS 0.2% ksi |
UTS ksi |
El% | ||||||
| Min. | Typ. | Min. | Typ. | Min. | Typ. | Min. | Typ. | Min. | Typ. | ||
| A | 1070 | 1207 | 1170 | 1310 | 155 | 175 | 170 | 190 | 8 | 14 | |
| B | 790 | 931 | 965 | 1034 | 115 | 135 | 140 | 150 | 10 | 17 | |
A: hardening 925°F (496°C) - 4 hours - air cooling
B: hardening 1100°F (593°C) - 4 hours - air cooling
2 examples of Heat Treatments that may be applied.
Elevated temperature properties
Minimum guaranteed values following EN 10088 hot rolled plates. The EN guaranteed values are valid for a thickness from 3/16" up to 3".
| Temperature °F Temperature °C |
212 100 |
302 150 |
392 200 |
482 250 |
572 300 |
|
| YS 0.2% | N/mm_ | 730 | 710 | 690 | 670 | 650 |
| ksi | 106 | 103 | 100 | 97 | 95 | |
Heat treatment : hardening 1094°F (590°C) - 4 hours - air cooling. 1 example of Heat Treatments that may be applied.
Minimum guaranteed room temperature impact values
Minimum guaranteed values following ASTM A693 hot rolled plates. The ASTM guaranteed values are valid for a thickness from 3/16" up to 3".
| Heat Treatment | KV transverse | |
| J | ft.lbf | |
| Hardening 1100°F (593°C) - 4 hours - air cooling | 20 | 15 |
| Heat Treatment | Hardness | |
| Rockwell | Brinell | |
| Hardening 925°F (496°C) - 4 hours - air cooling | C38 | 375 |
Density : 7800 kg/m3 (.2871 lbs/in3)
| Interval Temperature °C |
Thermal expansion ax10-6°C-1 |
°C | °F | Thermal conductivity (w.m-1.K-1) |
Young modulus (GPa) |
|
| 0-100 | 10.8 | 20 | 68 | 14 | 197 | |
| 0-200 | 11 | 100 | 212 | 16 | 193 | |
| 0-300 | 11.3 | 200 | 392 | 18.5 | 186 | |
| 0-400 | 11.6 | 300 | 572 | 20 | 180 | |
| 0-500 | 12 | 400 | 752 | 22 | 175 | |
| 500 | 932 | 23 | 170 | |||
Resistivity : 80 µ*.cm
Specific heat : 460 J.kg-1.K-1
Tension modulus : 77 GPa
The alloy is magnetic.
Martensitic transformation
Indicative values
Ms : 266°F (130°C)
Mf : 86°F (30°C)
1925°F+ /-50°F (1050°C +/-25°C) – 30 min up to 1 hour.
air cooling / oil quenching below 76°F (25°C)
The highest mechanical properties are obtained with the following heat treatment : 896°F (480°C) – 1 hour – air cooling. Higher ductilities are obtained when using higher aging temperatures up to 1148°F (620°C).
Processing
Hot Forming
Hot forming should be carried out in a temperature range of 1742-2192°F (950-1200°C). A full heat treatment including solution annealing, cooling lower than 76°F (25°C) and aging at the required temperature must be made after hot forming (function of the requested mechanical properties).
Cold Forming
Cold forming can be performed only to a limited extent and only on plates in the fully softened condition. Stress corrosion resistance is improved by re-aging at the precipitation hardening temperature after cold working.
The following processes may be performed: rolling, bending, hydroforming, etc. (fully softened conditions).
Cutting
Thermal cutting (plasma, thermal sawing, etc.). Due to the HAZ, the grade requires a suited cutting process. After cutting, grinding is necessary to eliminate the oxide formed layer.
Mechanical cutting (shearing, stamping, cold sawing, etc).
Welding
Alloy 17-4 PH can be welded by the following Welding processes: SMAW, GTAW, PAW and GMAW. SAW should not be used without preliminary testing (to check freedom of cracks and toughness of the weld metal).
Due to a ferrite delta primary type of solidification, the hot cracking risk of the weld metal or the HAZ is reduced.
Generally, no preheating must be done and interpass temperature must be limited to 248°F (120°C). The better toughness is obtained in the weld after a complete heat treatment (solution annealing + precipitation hardening).
Due to the martensitic microstructure, a low oxygen content in the weld metal is preferable to increase ductility and toughness. To avoid cold cracking, the introduction of hydrogen in the weld must be limited.
Alloy 17-4 PH can be welded with homogeneous filler metals such as E 630 (AWS A5.4) electrodes and ER 630 (AWS A5.9) wires.
Austenitic filler material can be used when the mechanical properties of 17-4 PH steel are not required in the weld and, in this case, no post-weld heat treatment must be applied.
Machining
Alloy 17-4 PH can be machined in both solution treated and precipitation hardened conditions. Machining condition may vary according to the hardness of the material. High speed steel tools or preferably carbide tools with Standard lubrification are normally used. If very stringent tolerances are required, it is necessary to take into account the dimensional changes during heat treatment.
Machining performance
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Principal Design Features
One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.
Machinability
Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.
Heat Treatment
CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.
Welding
Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.
Forging
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.