What is the current pricing for AMS-S-6758 4130 steel bars and reforging stock?
Pricing for AMS-S-6758 4130 Chrome-Molybdenum steel varies based on quantity, dimensions, heat treatment requirements, and current market conditions. At Aero-Vac Alloys & Forge, Inc., we offer highly competitive pricing on aircraft-quality 4130 steel bars and reforging stock with volume discounts available. Our pricing includes full material certification, traceability documentation, and compliance with AMS-S-6758 and superseding MIL-S-6758 specifications. Request a custom quote today and receive a detailed price breakdown within 24 hours, including expedited delivery options for urgent aerospace and defense projects.
What is the difference between AMS-S-6758 and MIL-S-6758 specifications?
AMS-S-6758 is the SAE International specification that superseded the military specification MIL-S-6758. Both standards cover the same 4130 Chrome-Molybdenum alloy steel bars and reforging stock for aircraft quality applications with identical chemical composition (0.95Cr, 0.20Mo, 0.28-0.33C) and mechanical property requirements. The transition to AMS-S-6758 represents the aerospace industry's move toward standardized SAE specifications while maintaining the stringent quality requirements originally established in MIL-S-6758. Our material is certified to both specifications and meets all aircraft quality standards for critical aerospace applications.
What makes AMS-S-6758 suitable for aircraft applications?
AMS-S-6758 4130 Chrome-Molybdenum steel is specifically designed for aircraft quality applications due to its exceptional strength-to-weight ratio, excellent weldability, and superior fatigue resistance. The alloy's chromium and molybdenum content provides enhanced hardenability and toughness, making it ideal for high-stress aircraft structural components, landing gear components, engine mounts, and fuselage parts. The specification requires rigorous testing including tensile strength, hardness verification, grain size analysis, and non-destructive testing to ensure consistent performance in critical aerospace environments where safety and reliability are paramount.
What heat treatment processes are recommended for AMS-S-6758 steel?
AMS-S-6758 4130 steel can be supplied in normalized or annealed conditions and responds excellently to various heat treatment processes. Common heat treatments include normalization (heated to 1600-1700°F and air cooled) for improved machinability, annealing for maximum ductility, and oil quenching followed by tempering for optimal strength and toughness combinations. The material can achieve tensile strengths ranging from 90,000 to 120,000 PSI depending on the heat treatment cycle. Our metallurgical team can provide custom heat treatment recommendations and services to meet your specific application requirements and performance specifications.
What product forms are available in AMS-S-6758 4130 steel?
We stock AMS-S-6758 and related 4130 Chrome-Molybdenum steel specifications in multiple product forms including round bars, square bars, flat bars, forgings, rings, sheets, strips, and plates. Our inventory includes various sizes and dimensions to accommodate diverse aircraft manufacturing requirements. All material is supplied with complete traceability documentation, material test reports (MTR), and certificates of conformance. We also offer custom cutting, machining, and fabrication services to deliver material in your required dimensions, reducing waste and accelerating your production timeline.
What certifications and quality standards does your AMS-S-6758 material meet?
All AMS-S-6758 4130 steel supplied by Aero-Vac Alloys & Forge meets stringent aerospace quality standards and is backed by our ISO 9001:2015 and AS9100D certifications. Every shipment includes complete material certifications, chemical analysis reports, mechanical test results, and heat lot traceability documentation. Our material is sourced from approved aerospace mills and undergoes rigorous incoming inspection to verify compliance with AMS-S-6758, MIL-S-6758, and related specifications. We maintain full chain of custody documentation and can provide additional testing services including ultrasonic inspection, magnetic particle testing, and dimensional verification as required.
Can you provide custom sizes and value-added services for AMS-S-6758 steel?
Yes, Aero-Vac Alloys & Forge offers comprehensive value-added services for AMS-S-6758 4130 steel including precision cutting to length, waterjet cutting, machining, grinding, heat treatment, and non-destructive testing. Our state-of-the-art facility is equipped to handle custom orders from prototype quantities to large production runs. We can work from your drawings and specifications to deliver material ready for your assembly process, significantly reducing your lead times and manufacturing costs. Our technical team collaborates closely with customers to optimize material selection, processing parameters, and quality verification procedures for critical aerospace applications.
