SAE AMS 5349C pdf download

SAE AMS 5349C pdf download.Steel,Corrosion Resistant,Investment Castings
13Cr Free Machining; Hardened and Tempered.
1.1 Form:
This specification covers a corrosion resistant steel in the form of investment castings.
1.2 Application:
These castings have been used typically for small parts up to 1000 °F (538 °C), but usage is not limited to such applications. Corrosion resistance is lower than that of AMS 5350, but machinability is better.
1.3 Classification:
Castings are classified by chemistry as follows:
Type I Sulfur content
Type 2 – Selenium content
1.3.1 Unless a specific type is ordered, either type may be supplied.
2. APPLICABLE DOCUMENTS:
The issue of the following documents in effect on the date of the purchase order forms a part of this specification to the extent specified herein. The supplier may work to a subsequent revision of a document unless a specific document issue is specified. When the referenced document has been canceled and no superseding document has been specified, the last published issue of that document shall apply.
3.3 Condition:
Castings shall be delivered in the hardened and tempered condition.
3.4 Test Specimens:
Specimens shall be separately cast, integrally-cast (See 8.2.7). or machined from a casting, and shall conform to 3.2.
3.4.1 II specimens are separately cast. vendor shall have a written procedure acceptable to purchaser.
Control factors of 4.4.2.2 shall apply.
3.4.2 Each master heat shall be qualified by evaluation of chemical, hardness. and tensile specimens.
3.4.2.1 It alloy additions or replenishments are made at remelt as in 3.2.3, the frequency of sampling and testing used by the vendor for qualification to 3.4.2 shall be acceptable to purchaser.
3.4.22 Tensile tests of 3.4.2 are not required if these tests are conducted using integrally-cast specimens (4.3.3.2) or specimens machined from a casting (4.3.3.3).
3.4.3 Chemical Analysis Specimens: Shall be of any convenient size and shape.
3.4.4 TensIle Specimens: Shall be of standard proportions in accordance with ASTM E 8 or ASTM E 8M with 0.250 inch (6.35 mm) diameter at the reduced parallel gage section (See 8.3).
3.4.4.1 Separately-cast and integrally-cast specimens may be either cast to size, or cast oversize and subsequently machined to 0,250 inch (6.35 mm) diameter.
3.4.4.2 When integrally-cast specimens and specimens machined from a casting are specified. specimen size and location shall be agreed upon by purchaser and vendor. (See 8.2.8 and 8.6)
3.4.5 Hardness Specimens for Response to Heat Treatment: May be a representative specimen or a casting.
3.5 Heat Treatment:
To produce the condition in castings for delivery, harden by cooling at a rate equivalent to air cool from the austenitizing temperature and temper at temperatures and for times to conform to hardness of 3.6.2.
3.5.1 Response to Heat Treatment: Castings or representative test specimens shall be heat treated as follows, for subsequent testing to demonstrate response to heat treatment.
3.5.1.1 Hardening and Tempering: Heat to 1750 °F ± 10 (954 °C ± 6), hold at heat for 60 minutes per inch of maximum cross section but not less than 30 minutes, and cool at a rate equivalent to air cool.
3.5.1.2 Hardening and Tempering: Heat to 1750 °F ± 10(954 DC ± 6), hold at heat for 30 minutes ±3, and cool at a rate equivalent to still air cool. Heat to 1100 °F ± 10 (593 DC ± 6), hold at heat for 60 minutes per inch of maximum cross section but not less than one hour, and cool in air.
3.5.2 Tensile specimens used for master heat qualification may be heat treated separately from castings.
3.6 Properties:
Conformance shall be based upon testing of separately-cast specimens unless purchaser specifies integrally-cast specimens or specimens machined from a casting. Properties for integrally-cast specimens and specimens machined from a casting shall be as specified by purchaser (See 8.6).
3.6.1 Room Temperature Tensile Properties: Shall be as shown in Table 2, determined in accordance with ASTM E 8 or ASTM E 8M (See 8.3) after heat treatment in accordance with 3.5.1.2. Properties other than those listed may be defined as specified in AMS 2360.