- 1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH round bar
- 1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH forging
- 1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH sheet
- 1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH flat bar
- 1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH pipe
1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH
Production specification
Square-shape steel: 1mm to 4000mm
Plate steel:0.1mm to 4000mm
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: φ6-1800mm, 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.
Ultrasonic inspection: 100% ultrasonic inspection for any inperfections or based on the customer's requirementExcellent service for all kinds of industries,with advantages of technologies, equipment and price.
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1.4542, DIN X5CrNiCuNb16-4, AISI 17-4PH
Designation by Standards
Brand Name | LH No. | Mat. No. | DIN | EN | AISI |
PK346 | 346 | 1.4542 | X5CrNiCuNb16-4 | - | 17-4PH |
Chemical Composition (in weight %)
C | Si | Mn | Cr | Mo | Ni | V | W | Others |
max. 0.07 | max. 0.70 | max. 1.50 | 16.00 | max. 0.60 | 4.00 | - | - | Cu: 3.50 |
Description
PK346 is a martensitic precipitation/age-hardening stainless steel offering high strength and hardness along with excellent corrosion resistance. It has good fabricating characteristics and can be age hardened by a single-step, low temperature treatment. It has high strength combined with good corrosion resistance in fresh and salt water, industrial and marine atmosphere, and in oxidizing chemicals. Pk346 shows excellent resistance to oxidation up to approximately 539�C.
Applications
It has been used for a variety of applications including oil field valve parts, chemical process equipment, aircraft fittings, fasteners, pump shafts, nuclear reactor components, gears, paper mill equipment, missile fittings, and jet engine parts.
Physical properties (avarage values) at ambient temperature
Modulus of elasticity [103 x N/mm2]: 196
Density [g/cm3]: 7.79
Thermal conductivity [W/m.K]: 15.3, 23.0 at 500oC
Electric resistivity [Ohm mm2/m]: 0.80
Specific heat capacity[J/g.K]: 0.46, 0.65 at 500oC
Transformation points: Ac(began): 590oC, Ac(finish): 770oC, Ms: 130oC, Mf: 30oC
Coefficient of Linear Thermal Expansion 10-6 oC-1
20-100oC | 20-200oC | 20-300oC | 20-400oC | 20-500oC |
11.7 | 11.7 | 12.1 | 12.2 | 11.9 |
Continuous Cooling Transformation (CCT) Diagram
Solution Treatment
Heat to 1025-1055oC, then air or oil cooling. This will produce a maximum Brinell hardness of 363.
Precipitation Hardening
Temperature 480-620oC, then air cooling. Hardness after precipitation hardening is 42-32 HRC.
Precipitation Hardening Temperature (oC) vs. Hardness (HRC)
100oC | 200oC | 300oC | 400oC | 450oC | 500oC | 600oC | 650oC |
34 | 34 | 35.5 | 42 | 45.5 | 42.5 | 35 | 32.5 |
Precipitation Hardening Diagram
Mechanical Properties of Precipitation Hardened Steel
Temperature | 0.2 % proof stress (N/mm2) | Tensile strength (N/mm2) | Elongation, min. (%) | Reduction, min. (%) | Notch impact energy (ISO-V), min. (J) |
480oC | 1170 | 1310 | 10 | 40 | - |
495oC | 1070 | 1170 | 10 | 44 | 7 |
550oC | 1000 | 1070 | 12 | 45 | 20 |
595oC | 795 | 965 | 14 | 45 | 34 |
620oC | 725 | 930 | 16 | 50 | 41 |
760oC | 515 | 795 | 18 | 55 | 75 |
Forging
Hot forming temperature: 1100-900oC.
Cold Working
Despite its high initial yield strength, 17-4 can be cold worked successfully by most common methods.
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.
Corrosion Resistance
PK346 has withstood corrosive attack better than any of the 400 series hardenable stainless steels, and, in most corrodents, its corrosion resistance closely approaches that of stainless types 302 and 304.
Weldability
PK346 can be satisfactorily welded by the shielded fusion and resistance welding processes. Oxyacetylene welding is not recommended, since carbon pickup in the weld may occur. When a filler metal is required, AWS E/ER630 welding consumables should be considered to provide welds with properties matching those of the base metal. When designing the weld joint, care should be exercised to avoid stress concentrators, such as sharp corners, threads, and partial-penetration welds. When high weld strength is not needed, a standard austenitic stainless filler, such as E/ER308L, should be considered.
Mechanical properties
Heat treatment
Machining
Welding performance
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