| Product Information | |
| Name | 17-4PH Steel |
| Stocklist & Inventory Available: | Blade Steel |
| Material Specification: | ASTM,AISI,UNS,AMS,Werkstoffe,Miscellaneous |
| Equivalent Grade: | A564,AISI 630,UNS S17400,AMS 5622 / 5643,1.4542,X5CrNiCuNb16-4,10705GU-GV,TLV 9239 01 |
| Condition of delivery: | Hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering |
| Surface condition | Scaled (hot working finished)/ground/rough machining/fine machining |
| Product Shape available: | Round,Flat,Square,Hexagon,Plate,Sheet,Other |
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Description
Chemical Composition
Mechanical Properties
More
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►GENERAL CHARACTERISTICS OF PH GRADES 17-4PH17-4 PH steel is a martensitic precipitation age hardening stainless steel that combines high strength and hardness with excellent corrosion resistance. It may be age hardened by a single-step low- temperature treatment.►17-4 PH Inventory Size Ranges
APPLICATIONSThis grade of steel is used for a variety of applications including oil field valve parts, chemical process equipment, forged aircraft fittings, fasteners and pump shafts, gears, nuclear reactor parts and jet engine parts.FORGINGForging of this grade should be carried out between 2150/2200ºF (1180/1200ºC) and 1850ºF (1010ºC.) For optimum grain size and mechanical properties, forgings should be air cooled to below 90ºF (32ºC) prior to further processing. Forgings must be solution treated prior to hardening.HEAT TREATMENTType 17-4 PH alloy is hardened by heating solution-treated material, condition A, to between 900/ºF (480ºC) and 1150ºF (620ºC) for one to four hours, depending upon the temperature, then air cooling.SOLUTION TREATMENTHeat at 1900ºF (1040ºC) for 30 minutes and cool to below 90ºF (32ºC) to allow completetransformation to martensite. Sections less than 3” may be quenched in a suitable liquid while those sections over 3” should be rapidly air cooled. Parts should not be used in the solution – treated condition due to possible problems with stress corrosion cracking. AGE HARDENINGFor condition H900 heat solution-treated material at 900ºF (480ºC) for 1 hour and air cool. For conditions H925, H1025, H1075, H1100, H1150: heat solution-treated material at appropriate temperature ± 15ºF (± 8ºC) for 4 hours and air cool.MACHINABILITY17-4 PH grade is readily machinable in both the solution-treated and various age-hardened conditions. In the solution-treated condition it machines in a similar way to stainless 304. The machinability improves as the hardening temperature increases.WELDABILITY17-4 PH grade can be satisfactorily welded by the shielded fusion and resistance welding processes.Oxyacetylene welding is not recommended since carbon pick up may occur in the weld. If a filler metal is required a 17-4PH type welding rod should be used to provide welds with base-metal properties. If high strength is not required an austenitic stainless filler metal is satisfactory. Welding in the solution-treated condition is normally satisfactory, but if high welding stresses are a possibility it may be best to weld in the overaged (H1150) condition. If welded in the solution-treated condition, 17-4PH alloy may be aged to the desired strength level after welding, but the optimum strength-ductility-corrosion resistance combination is obtained by solution treating the welded part before aging. Welding in the overaged conditioned must be followed by solution treating then aging. Not finding what you are looking for? Connect with our sourcing group at pb@longhaisteel.com►17-4PH Chemical Composition
Please contact us for more details. The technical data provided is for information only and not for design purposes.►17-4PH Standard Heat TreatmentsAs supplied from the mill in Condition A, PCSSC-LTD 17-4 PH Stainless Steel can be heat treated at a variety of temperatures to develop a wide range of properties. Eight standard heat treatments have been developed. The following chart outlines the times and temperatures required.This alloy exhibits useful mechanical properties in Condition A. Tests conducted at an exposed marine atmosphere on a 80 ft. (24.4 m) lot, 82 ft. (25 m) from the waterline, show excellent stress corrosion resistance. Condition A material has been used successfully in numerous applications. The hardness and tensile properties fall within the range of those for Conditions H 1100 and H 1150. However, in critical applications, the alloy is used in the precipitation- hardened condition, rather than Condition A. Heat treating to the hardened condition, especially at the higher end of the temperature range, stress relieves the structure and may provide more reliable resistance to stress corrosion cracking than in Condition A. TABLE 1 - STANDARD HEAT TREATMENTSCondition A Solution Treated at 1900 °F ± 25 °F (1038 °C ± 14 °C) or Air cool below 90 °F (32 °C).
TABLE 2 – TYPICAL MECHANICAL PROPERTIES
TABLE 3 - PROPERTIES ACCEPTABLE FOR MATERIAL SPECIFICATION*
TABLE 4 - PIN BEARING PROPERTIES OF SHEET*
** Offset equals 2% of pin diameter. *** Yield equals ultimate tensile strengths due to rounding. †e/D = Distance from edge of specimen to edge of hole + hole diameter. Please contact us for more details. The technical data provided is for information only and not for design purposes.ELEVATED TEMPERATURE PROPERTIESMechanical properties of CNLHSS Steel 17-4 PH Stainless Steel Condition
H 1150 after long-time exposure at elevated temperatures are shown in Table 4. When tested at room temperature after exposure, a slight loss of toughness and gain in strength can be noted. However, H 1150 properties can be restored by heat treating at 1150 °F (621 °C) for four hours after original exposure. By taking advantage of this re-aging treatment, the service life of parts exposed at elevated temperature to 750 °F (339 °C) can be extended indefinitely. Elevated temperature properties for short-time exposures were determined for Conditions H 900 and H 1150. Specimens were heated rapidly by resistance methods and reached exposure temperatures within two seconds. Specimens were then held at temperature for the times indicated and tested both at exposure temperature and at room temperature. TABLE 5 - EFFECT OF ELEVATED TEMPERATURE EXPOSURE ON MECHANICAL PROPERTIES - CONDITION H 1150
NOTE: These tests represent instant heating of the entire cross section of the test specimens. Under actual conditions, heating rates would depend on heat source, surface conditions and thermal conductivity of PCSSC-LTD 17-4 PH Stainless Steel (see Physical Properties). Times and temperatures shown in the tables apply only after parts have reached temperatures. ►17-4PH Physical PropertiesPHYSICAL PROPERTIES
Please contact us for more details. The technical data provided is for information only and not for design purposes. |
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