Woodward SP-1197 - Stainless Steel Specification
Woodward SP-1197 is a specification of Woodward Inc. that specifies the chemical makeup and mechanical requirements for the 440C/440 Stainless Steel in the raw materials purchased by Woodward Inc. in accordance with the company’s shop procedures. This specification outlines the chemical and mechanical requirements for stainless steel bars and forgings supplied by Woodward Inc.
Applications for Woodward, Inc.
Woodward, Inc. is a US-based company that specializes in the design, construction, and servicing of control systems and components for aircraft and industrial engines, turbines, and power generation equipment. Among the products of this firm, components made of SP-1197-compliant grade 440C stainless steel are of great significance in rotor components, control components, and bearings, where the hardness of the components is a key factor in the reliability of the system.
What is 440C Stainless Steel ?
440C is a high carbon martensitic stainless steel that has slightly more carbon than 440A and 440B giving it the highest hardness of any martensitic stainless alloy. This grade has excellent wear resistance making it perfect as a bearing steel used as ball bearings and bearing races.
440 STAINLESS STEEL SPECIFICATIONS
440A Stainless Steel
440A is a high-carbon martensitic stainless steel, AOD melted for refined quality and consistency. It contains slightly less carbon than 440B and 440C
440C Stainless Steel
440C is the hardest and most wear-resistant grade in the 440 series due to its highest carbon content. It achieves excellent dimensional stability and superior bearing performance after hardening.
Certified Material for Critical Service
Fighter Jet Metals supplies 440A, 440B, 440C, and 440FSE Stainless Steel in various forms—bars, plates, and forgings—with full traceability and certification. Each alloy meets the highest aerospace and industrial standards, offering guaranteed quality and performance.