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17-4PH

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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.

Specs: 17-4ph (UNS S17400)
A 17Cr-4Ni-3Cu Precipitation Hardening Martensitic stainless steel

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

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).

Chemical Analysis
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

Minimum guaranteed room temperature hardness 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 Hardness
Rockwell Brinell
Hardening 925°F (496°C) - 4 hours - air cooling C38 375

 

Physical Properties
Density : 7800 kg/m3 (.2871 lbs/in3)
Following physical properties have been obtained after hardening 896°F (480°C) – 1 hour - air cooling.

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

Room temperature properties:
Resistivity : 80 µ*.cm
Specific heat : 460 J.kg-1.K-1
Tension modulus : 77 GPa
The alloy is magnetic.
Heat Treatment
Martensitic transformation
Indicative values
Ms : 266°F (130°C)
Mf : 86°F (30°C)
Solution annealing
1925°F+ /-50°F (1050°C +/-25°C) – 30 min up to 1 hour.
air cooling / oil quenching below 76°F (25°C)
Aging / Tempering
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).
 
17-4ph
 
Hardness/Temperature tempered for 4 hours after austenitizing at 1904°F (1040°C) for 30 min quenched 212°F/sec (100°C/sec).

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

Download 17-4PH the mechanical properties of the report, the report provides detailed performance analysis and application. Download >>


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.





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