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A-297 Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application


This specification covers standards for iron-chromium and iron-chromium-nickel alloy castings of general purpose grades (Grades HF, HH, HI, HK, HE, HT, HU, HW, HX, HC, HD, HL, HN, and HN) applicable in heat-resistant services. Alloys shall be produced through electric arc, electric-induction, or other approved processes. Heat-treatment shall be conducted when agreed upon by the manufacturer and purchaser. The material shall conform to carbon, manganese, silicon, phosphorus, sulfur, chromium, nickel, and molybdenum contents. Tensile requirements including tensile strength, yield point, and elongation shall apply when specified in the purchase order. Guidelines for repair by welding are also given.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.


Centrifugal Casting process is your best assurance of a high strength, defect free and refined metal component ready for use, or further machining and testing


A-297 Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for General Application
Grades include:
HF 19 Chromium-9 Nickel, 302B, UNS# J92603
HH25 25 Chromium-12 Nickel, 309, UNS# J93503
HI 28 Chromium-15 Nickel, SAE 70310A, UNS# J94003
HK 25 Chromium-20 Nickel, 310, UNS# J94224
HE 29 Chromium-9 Nickel, 312, UNS# J93403
HT 15 Chromium-35 Nickel, 330, UNS# N08605
HU 19 Chromium-39 Nickel, SAE 70331, UNS# N08004
HW 12 Chromium-60 Nickel, SAE 70334, UNS# N08001
HX 17 Chromium-66 Nickel, SAE 70335, UNS# N06006
HC 28 Chromium, 446
HD 28 Chromium-5 Nickel, 327, UNS# J93005
HL 29 Chromium-20 Nickel, UNS# N08604
HN 20 Chromium-25 Nickel, UNS# J94213
HP 26 Chromium-35 Nickel, UNS# N08705

Available Forms

  • Centrifugal Castings