What is SS321 stainless steel?

SS321 is a grade of stainless steel that includes titanium. This addition helps prevent carbide precipitation at high temperatures, making it more resistant to corrosion and cracking in demanding exhaust applications.

What does '1.5D radius' mean for this elbow?

The '1.5D radius' refers to the bend's tightness. 'D' represents the pipe's outer diameter (4 inches in this case), so a 1.5D radius means the center of the bend is 1.5 times the pipe diameter away from the pipe's edge. This allows for a more compact bend than a larger radius.

What is the benefit of mandrel bending?

Mandrel bending uses a "mandrel" inside the pipe during the bending process. This prevents the pipe from collapsing or kinking, ensuring the internal diameter stays consistent throughout the bend. This is important for maintaining smooth exhaust flow and engine performance.

Specifications

Brand: Stainless Bros
Part #: 701-10226-3150
UPC: 701-10226-3150

Stainless Bros 4in SS321 45 Deg Mandrel Bend Elbow - 1.5D Radius 16GA/.065in Wall (No Leg)

Name: Stainless Bros 4in SS321 45 Deg Mandrel Bend Elbow - 1.5D Radius 16GA/.065in Wall (No Leg)
Brand: Stainless Bros
SKU: stainless-bros-stainless-bros-4in-ss321-45-deg-mandrel-bend-elbow-1-5d-radius-16-t14-548488
Price: 71.67 USD
Availability: BackOrder

$71.67

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Stainless Bros 4in SS321 45 deg mandrel bend elbow with a 1.5D radius and 16GA/.065in wall. Ideal for custom exhaust fabrication.

Key Features

Made from SS321 stainless steel for high-temperature resistance.
Features a 45-degree bend with a 1.5D radius for compact routing.
Constructed from 16-gauge (.065 inch) thick tubing for durability.
Mandrel bent to maintain consistent diameter and prevent flow restriction.
4-inch outer diameter pipe size.
No leg configuration offers flexibility in custom fabrication.

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About this part

Product Details

This 4-inch diameter exhaust elbow from Stainless Bros is made from SS321 stainless steel, a material known for its strength and resistance to high temperatures, making it a solid choice for custom exhaust systems. The 45-degree bend features a 1.5D radius, which means the center of the bend is 1.5 times the pipe's diameter away from the pipe's edge. This tighter radius allows for more compact routing in tight spaces compared to a larger radius bend. The tubing itself is 16-gauge thick, or .065 inches, providing good durability for exhaust applications.

The mandrel bending process ensures that the pipe's diameter remains consistent throughout the bend, preventing any kinking or flattening that could restrict exhaust flow. This is crucial for maintaining engine performance. This particular elbow is a "no leg" configuration, meaning it's a clean bend without any straight sections extending from the ends, which gives fabricators flexibility in how they connect it into their custom exhaust setup.