1.7734 Alloy 15CDV6 Small Diameter Cold Drawn Seamless Aviation Tube—Product Overview

Material

Alloy 15CDV6 (also designated WS 1.7734, AIR 9160C, 15CrMoV6) is a low‑carbon, chromium‑molybdenum‑vanadium heat‑treatable alloy steel. It combines high yield and tensile strength with excellent toughness and exceptional weldability, even without post-weld heat treatment 

Specification

• Designation: 15CDV6, WS 1.7734, AIR 9160C

• Product Form: Cold-drawn, seamless, small-diameter precision tube

• Applicable Standards: TE014 (seamless tube), AECMA FE‑PL1505, AIR 9160C, DIN series (65389/65390), ASNA 3108, LN 9369, etc. 

Chemical Composition

Below is a comparative table featuring 15CDV6 and four similar grades (12CrMoV6‑9 / 1.7734, 14CrMoV6‑9 / 1.7735, 15CrMoV5‑9 / 1.8521, and 15CrMoV5‑10 / 1.7745) with their typical alloying ranges:

Mechanical Properties

Comparative mechanical properties across five related grades in different conditions:

Key Characteristics

• High strength combined with toughness: Achieves tensile strengths in excess of 1,200 MPa (1.7734.6 condition) while maintaining ductility and structural integrity

• Excellent weldability: Welding is feasible with minimal or no post‑weld heat treatment, preserving mechanical properties 

• Heat‑treatable: Response to quench and temper cycles allows tailored performance—e.g., austenizing ~980 °C followed by oil quench and tempering ~650 °C yields Rm 1175 MPa, Rp0.2 980 MPa, hardness ~39 HRC 

Applicable Standards/Specifications

• WS 1.7734, 15CrMoV6

• AECMA: FE‑PL63S, FE‑PL1505

• AIR 9160C

• DIN: 65389 / 65390 (sheets & plates), 65035 / 7527 (forgings)

• ASNA 3108

• TE014 (seamless tube)

• LN / MN tooling equivalents 

Applications

Used extensively in aerospace and motorsport engineering, particularly where strength-to-weight and reliability are critical:

General application area:

• Structural and high-load components in aerospace and motorsports

Typical uses include:

• Roll cages and safety cells (DMB-certified standard in professional motorsport) 

• Rocket motor casings, pressure vessels, and suspension systems (wishbones, uprights, subframes, push rods, track components) 

• Aircraft structural elements requiring cold‑drawn, seamless tube with high mechanical performance 

• Components in high-temperature or high-pressure environments within aerospace, automotive, defense, and nuclear industries 

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