DX Engineering offers Heavy‑Duty 4130 Chromoly Steel Masts in both 11‑foot and 22‑foot lengths.

DX Engineering Heavy-Duty 4130 Chromoly Steel Masts offer ham radio operators an opportunity to stack large antennas. These 2-inch and 3-inch outside diameter galvanized masts feature a 0.250-inch wall thickness and meet ASTM A-513 Type 5 ratings.

These high-strength carbon steel masts are cold-drawn and electric-welded with a specified yield stress rating of over 100,000 psi! Tensile strength minimum is above 110,000 psi. Minimum Rockwell B hardness is 96. They are temperature stress-relieved to ensure consistent mechanical strength. Compared to standard galvanized plumbing pipe, the Heavy‑Duty 4130 chromoly steel mast offers substantially greater strength and durability.

Planning on stacking a few mono-banders on the tower? Installing multiple Yagis stacked high and deep on an H frame? Raising a BIG log-periodic? When you’re supporting big antennas with substantial wind area, there’s no room for compromise! A DX Engineering Heavy-Duty 4130 Steel Mast is the BEST strength-focused choice for mounting demanding antenna arrays atop a heavy-duty tower!

The galvanizing on these masts meets ASTM A123/A123M specifications. As with all hot‑dip galvanized products, surface irregularities are normal. Any cut ends are protected with a cold galvanizing coating.

Important: Because these masts are galvanized, their overall outside diameter will be larger than the nominal size. The 2‑inch mast may measure up to 2.070 in. OD, and the 3‑inch mast may measure up to 3.130 in. OD.

DX Engineering Heavy-Duty 4130 Chromoly Steel Masts may be ordered and picked-up at the Summit Racing Equipment Retail Store, 1200 Southeast Ave, Tallmadge, OH 44278.

Because of their length, these masts require truck‑freight shipping. Our system automatically calculates our low‑cost truck‑freight rates to any location within the continental United States. With no obligation to purchase, simply click ADD TO CART, enter your ZIP Code, and click CALCULATE to view your shipping cost.

Due to size restrictions, air freight is not available. For information regarding a surface freight shipment of these masts to locations outside of the continental US, send an e-mail inquiry to dxengineering@dxenginering.com.