15CDV6 (1.7734) Steel – High Strength and Excellent Weldability
15CDV6 (material number 1.7734) is a high-performance chromium-molybdenum-vanadium steel grade specifically developed for lightweight, strong, and reliable structures. Thanks to its unique combination of high strength, excellent weldability, and good workability, 15CDV6 is widely used in industries such as motorsport, aerospace, and defense.
When weight reduction and structural integrity are critical, 15CDV6 offers clear advantages over conventional structural steels.
Why Choose 15CDV6?
Compared to commonly used chromoly steel grades such as 25CrMo4 (SAE 4130), 15CDV6 offers a significantly higher yield strength while maintaining excellent weldability and ease of fabrication. This makes it a preferred choice for applications exposed to high loads and dynamic forces.
One of the major advantages of 15CDV6 is its excellent weldability. The material can be welded directly without extensive post-weld heat treatment while retaining most of its mechanical properties.
In addition, the risk of cracking adjacent to the weld is significantly lower than with many alternative high-strength steels. This contributes to a longer service life and greater structural reliability, even under extreme loading conditions.
15CDV6 vs 25CrMo4 (SAE 4130)
While 25CrMo4 has long been a popular choice for chassis and tube fabrication, 15CDV6 offers a higher yield strength and a more favorable combination of strength and weldability. This enables lighter structures to be designed without compromising safety or durability.
The Best Choice for Critical Structures
For applications where failure is not an option, 15CDV6 provides an exceptional combination of strength, reliability, and manufacturability. Whether used for a professional roll cage, an aerospace structure, or a heavily loaded chassis, 15CDV6 steel (1.7734) is among the best choices available in the category of high-strength structural steels.
Looking for 15CDV6 tubes, bars, or sheet material? Contact us for expert advice, availability, and custom solutions.
Key Properties
Tensile strength of approximately 1000–1200 MPa (depending on heat treatment)
Higher yield strength than 25CrMo4 / SAE 4130
Excellent weldability without complex post-weld heat treatment
Reduced risk of cracking in the heat-affected zone (HAZ)
Outstanding strength-to-weight ratio
Suitable for highly loaded and safety-critical structures
Excellent Weldability
Applications of 15CDV6
Thanks to its combination of high strength and relatively low weight, 15CDV6 is widely used in industries where performance and safety are paramount.
Motorsport
Roll cages
Chassis structures
Suspension components
Aerospace
Aircraft structures
Structural components
Lightweight frames
Defense
Highly loaded structural parts
Specialized vehicles and systems
Light Aircraft Construction
Fuselage structures
Load-bearing components
Frames and tubular constructions