SAE AMS 5398F pdf download

SAE AMS 5398F pdf download.Steel,Corrosion-Resistant, Sand and Centrifugal Castings 16Cr- 4.1Ni – 0.22Cb (Nb)- 2.8Cu Solution Heat Treated.
1.1 Form
This specification covers a corrosion-resistant steel in the form ol sand or centrifugal castings.
1.2 Application
These castings have been used typically for paris requiring corrosion resistance and strength up to 600 F (316 C). but usage is not limited to such applications. Ceiain processing procedures and service conditions may cause these products to become subject to stress-corrosion cracking; ARP1 110 recommends practices to minimize such conditions.
2. APPLICABLE DOCUMENTS
The issue 01 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 cancelled and no superseding document has been specified, the last published issue of that document shall apply.
2.1 SAE Publications
Available Iron, SAE International, 400 Commonwealth Drive. Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA). wwwsae.org.
AMS 2175 Classification and Inspection of Castings
AMS 2248 Chemical Check Analysis Limits, Corrosion and Heat-Resistant Steels and Alloys, Maraging and Other Highly-Alloyed Steels, and Iron Alloys
AMS 2633 UltrasonIc Inspection. Centrifugally-Cast, Corrosion-Resistant Steel Tubular Cylinders
AMS 2694 Repair Welding 01 Aerospace Castings
AMS 2750 Pyrometry
AMS 2804 Identification. Castings
ARP111O Minimizing Stress Corrosion Cracking in Wrought Forms of Steels and Corrosion-Resistant Steels and Alloys
3.3 Condition
Castings shall be delivered in the solution heat treated condition.
3.4 Test Specmens
3.4.1 Each master heat shall be qualified by evaluation of chemical and tensile specimens.
3.4.1.1 If 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 shall be acceptable to purchaser.
3.4.1.2 The tensile tests of 3.4.1 are not required if these tests are conducted using integrally-cast specimens (4.3.3.2) or specimens machined from castings (4.3.3.3).
3.4.2 Chemical Analysis Specimens
Shall be of any convenient size and shape.
3.4.3 TensIle Coupons
Shall be attached to castings, as prolongation or integral, if practicable, or shall be standard keel blocks conforming to ASTM A 370, unless purchaser permits use of cast-to-size specimens. Coupons shall be cast with each melt of metal for castings, shall be cast in molds made of suitable core sand, shall be poured from the same ladles as the castings, and shall be kept in the mold until black. Metal for the coupons shall be part of the melt which is used for the castings. Tensile specimens in accordance with ASTM A 370 shall be machined from the coupons after heat treatment as in 3.5.
3.4.3.1 If specimens are separately-cast, vendor shall have a written procedure acceptable to purchaser. Control factors of 4,4.2.2 shall apply.
3.5 Heat Treatment
Castings and representative tensile coupons shall be given a homogenization heat treatment prior to solution heat treatment or, when permitted by purchaser, may be given two solution heat treatments. Pyrometry shall be in accordance with AMS 2750. At least one set of tensile coupons shall, during each stage of heat treatment, be put into a batch-type furnace with each load of castings or into a continuous furnace at intervals of not longer than three hours.
3.5.1 Homogenization Heat Treatment
Heat to 2100°F ± 25(1149°C ± 14), hold at heat for not less than 90 ninutes. and cool as required to below 70°F (21 °C).
3.5.2 Solution Heat Treatment
Heat to 1900 °F ± 25 (1038 °C ± 14), hold at heat for 60 minutes per inch (25 mm) of maximum cross-section but not less than 30 minutes. and cool as required to below 70 °F (21 °C).
3.6 Properties
Castings and representative tensile specimens produced in accordance with 3.4.3 shall conform to the following requirements, hardness and tensile testing shall be performed in accordance with ASTM A 370.
3.6.1 As Solution Heat Treated
3.6.1.1 Hardness of Castings
Shall be not higher than 363 HB. or equivalent (see 8.3).