17 4ph investment cast

17-4PH Precipitation Hardening Stainless Steel-Casting ...

17-4PH Heat treatment process: generally all castings need to be anneal or normalization. Anneal at 890-910°C Normalization at 870-890 °C Manufacture Process: sand casting, precision LOST WAX investment casting. 17-4PH APPLICATIONS . Propeller shafts, pump shafts, pins, and valve spindles. Corrosion resistance is similar to type 304.

Stainless Steel Investment Castings - Casting Industries

Stainless steel investment castings are “corrosion-resistant” when used in liquid environments and vapors below 1200°F (650°C) and “heat-resistant” when used above this temperature. There are differences between wrought and cast versions of stainless steel.

Failure analysis of holding yokes made of investment cast ...

Holding yokes made of investment cast 17-4PH stainless steel were too soft (below 20 HRC). Optical microscopy of the parts showed that there is a high fraction of retained austenite after oil quench due to high amount of molybdenum found in parts as an impurity.

Cast 17-4PH Heat Treat - Hardness vs Yeild Strength ...

eng-tips› …› Steel and Stainless engineering ForumFeb 14, 2007· RE: Cast 17-4PH Heat Treat - Hardness vs Yeild Strength? israelkk (Aerospace) 14 Feb 07 09:37 Here is a quote from MIL-HDBK-5J regarding 17-4PH castings "Alloy 17-4PH castings are produced in sand molds, investment molds, and by centrifugal casting.Agree with 1)-2). Solidification segregation may be the problem. Homogenize at a minimum of 1900 o F (1040 o C)* for a minimum of 90 minutes, then cool to below 90 o F (32 o C), as per para. 5.2.1 of ASTM A747/A747M, 'Standard Specification for Steel Castings, Stainless, Precipitation Hardening.' h ttp:// astm.org/c gi-bin/Sof tCart.exe/ DATABASE.C ART/REDLIN E_PAGES/A7 47A747M.ht m?L+mystor e+fwcr1683 *Homognize as necessary as high as 2100 o F (1150 o C), followed by air cooling to below 90 o F (32 o C). Solution anneal and age by the book, e.g., ASTM A747 paragraph 5.2.2 and Table 2. Messing with the ageing time may adversely affect impact properties. What specification are you following, and what is the maximum material thickness?1Thanks, I’m not exactly sure where those numbers came from; I believe they were pulled from a previously supplied part of the same material. I pulled the print and it just said “Precipitation harden to achieve Rc 38-42”, but like I said there was a switch from Oil to Air quench before my time, and the process was an outside service for us… The part has complex geometry with it’s thickest cross section around .27” and as thin as .06”. Some deformation is expected, manual straightening is acceptable. I’ll switch to the ASTM spec Thanks againAnother question, I haven’t seen an acceptable rate of cooling listed for the Homogenize/Anneal step, is it possible to cool to fast? I'd assume so...I have never seen cooling too fast being an issue metallurgically. I have seen it cause excessive distortion. I don't like quenching other than forced air unless there is no other way to get the part cool in 30 min. Have you talked with the casting house? They may be able to put the hot castings into a holding funace and carry out the homogenize step right then. Some points. - The higher temp homogenize is important. Your casting will have significant segregation. - Atmospher control will be critical. You can't do the high temp steps in air. Oxidation will kill you. Surface damage, alloy depleation and such. - If low temp toughness is your goal then you are going to need a higher aging temp (lower strength). The 925F condition is not known for beign forgiving. - The aging should be 4 hours. You adjust the temp, not the time. Playing with time can give you unstable or unrepeatable results. = = = = = = = = = = = = = = = = = = = = Rust never sleeps Neither should your protection trent-tube/contact/Tech_Assist.cfmHere is a quote from MIL-HDBK-5J regarding 17-4PH castings "Alloy 17-4PH castings are produced in sand molds, investment molds, and by centrifugal casting. While 17-4PH has good castability, it is subject to hot-tearing, so heavy X or T sections, sharp corners, and abrupt changes in section size should be avoided. Alloy 17-4PH castings are susceptible to microshrinkage which will decrease the ductility but have no effect on the yield or ultimate strength. During heat treatment, care must be exercised to avoid carbon or nitrogen contamination from furnace atmospheres. Combusted hydrocarbon and dissociated ammonia atmospheres have been sources of contamination. Air is commonly used and both vacuum and dry argon are effective for minimizing scaling. Oxides formed during solution treating in air may be removed by grit blasting or abrasive tumbling. Alloy 17-4PH can be heat treated to develop a wide range of properties. Heat treatment procedures are specified in applicable material specifications and MIL-H-6875." As to hardness correlation to yield/tensile strength, there is no direct and exact correlation. For the same yield/tensile strength there may be up to 10Rc hardness variations. Therefore, if hardness is required, for each batch you will need to test heat treatment parameters which is not practical and you may end up with non standard heat treatments. If this part is for aerospace/military use you probably do not have the freedom to use non standard heat treatments but only those allowed by MIL-H-6875. Therefore, hardness can not be defined but only yield and tensile strength.

Martensitic Stainless Steel Investment Casting ...

Martensitic Stainless Steel Alloy Properties Condition Tensile Strength 0.2% Yield Strength % Elongation Range (2.5 cm or 1”) Hardness Range or Max

A study on the investment casting of 17-4PH stainless ...

AbstractThe complex shape of helical impellers in centrifugal pumps increases the difficulty of investment casting. Determining means of predicting the form and location of defects in order to prevent the formation of defects is crucial to the casting process. This study employed AnyCasting to conduct flow analysis on the moulding of 17-4PH stainless steel impellers in centrifugal pumps.Published in: Materials Research Innovations · 2015Authors: P H Huang · M J GuoAffiliation: University of Science and Technology Sana aAbout: Investment casting · Impeller

17-4PH Impeller Casting (Screw or Auger) | Sand Casting ...

Precision Lost Wax Investment Casting process with the casting Material: 17-4PH Precipitation Hardening Stainless Steel Carbon steel, SS304 (CF8), SS316(CF8M), This type screw is a drill auger, suitable for constructive or valves.

Cast 17-4PH Heat Treat - Hardness vs Yeild Strength ...

eng-tips› …› Steel and Stainless engineering ForumFeb 14, 2007· RE: Cast 17-4PH Heat Treat - Hardness vs Yeild Strength? israelkk (Aerospace) 14 Feb 07 09:37 Here is a quote from MIL-HDBK-5J regarding 17-4PH castings "Alloy 17-4PH castings are produced in sand molds, investment molds, and by centrifugal casting.

17-4PH Impeller Casting (Screw or Auger) | Sand Casting ...

Precision Lost Wax Investment Casting process with the casting Material: 17-4PH Precipitation Hardening Stainless Steel Carbon steel, SS304 (CF8), SS316(CF8M), SS304L(CF3), SS316L(CF3M) or SS321 can be casted too. This type screw is a drill auger, suitable for constructive or valves.

Effect of porosity on ductility variation in investment ...

The stainless steel alloy 17-4PH contains a martensitic microstructure and second phase delta ({delta}) ferrite. Strengthening of 17-4PH is attributed to Cu-rich precipitates produced during age hardening treatments at 900-1150 F (H900-H1150). For wrought 17-4PH, the effects of heat treatment and ...

Failure analysis of holding yokes made of investment cast ...

Holding yokes made of investment cast 17-4PH stainless steel were too soft (below 20HRC). Optical microscopy of the parts showed that there is a high fraction of retained austenite after oil ...

A study on the investment casting of 17-4PH stainless ...

AbstractThe complex shape of helical impellers in centrifugal pumps increases the difficulty of investment casting. Determining means of predicting the form and location of defects in order to prevent the formation of defects is crucial to the casting process. This study employed AnyCasting to conduct flow analysis on the moulding of 17-4PH stainless steel impellers in centrifugal pumps.Published in: Materials Research Innovations · 2015Authors: P H Huang · M J GuoAffiliation: University of Science and Technology Sana aAbout: Investment casting · Impeller

Aerospace Investment Castings | Investment Casting …

Aerospace Investment Castings 8620, 17-4PH, 15-5PH & Aluminum. At Signicast, we pour a wide variety of ferrous and non-ferrous alloys including 300 stainless steels that can be cast almost as thin as aluminum. Then, utilizing soluble or ceramic core technologies, we can produce complex interior features or …

The Effects of Casting Porosity on the Tensile Behavior of ...

SEM Fractography of Investment Cast 17-4PH Scanning electron microscopy of tensile bar fractures generally showed ductile failure (microvoid coalescence) on samples with H925, H1025, and H1100 heat treatments, although some flat regions with quasi-cleavage …

Investment Casting Alloy List - Protocast JLC

Investment Casting Alloy List - Listed is our most commonly poured alloys. If there is an alloy that you are interested in that is not listed below, or if you have any questions about what alloy is best suited to your needs, please contact us at [email protected] or call us at (818) 882-7848 ext. 280.

17-4PH stainless steel investment casting, China ...

As the leading China investment casting manufacturer, Qinhuangdao ANYE can provide precipitation-hardening stainless steel investment casting in accordance with client’s requirements. The main material is 17-4PH stainless steel.

Investment Casting Manufacturer - improprecision

Impro’s Investment Casting Capabilities Impro is capable of meeting material specifications according to ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB standards. We have more than 100 different ferrous and non-ferrous alloys with which we cast parts using a complex design criteria.

Alloys - DP Cast - Investment Casting

Tolerances: At DP Cast, we provide tight tolerance work of +/- 0.005 inch or +/- 0.005 inch per inch of geometry, which can vary, depending upon the size and complexity of the part. The standard surface finish is RMS 125, with a surface profile, flatness and straightness to within 0.010 inch.

Numerical simulation of the solidification microstructure ...

17-4PH stainless steel is the main alloy to be investment cast in this study, where the main alloying components are iron, chromium, nickel and copper, shown in table 1. In the actual casting experiment, two molds, calibration and test were designed as shown in figures 1 and 2 .

Casting - Metal Products, Inc.

Aluminum Die Casting. There are many reasons aluminum is the most commonly cast non-ferrous metal in the world. It’s light, strong, corrosion resistant, non-staining, highly conductive, non-magnetic, accepts many finishes and is cost effective.

Alloy Shrinkage Factors for the Investment Casting of 17 ...

Abstract. In this study, alloy shrinkage factors were obtained for the investment casting of 17-4PH stainless steel parts. For the investment casting process, unfilled wax and fused silica with a zircon prime coat were used for patterns and shell molds, respectively.

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