AZZ vs CAT vs NUE vs RS

For growth investors, Nucor Corporation (NUE) is the stronger pick with 5.

7% revenue growth year-over-year, versus 3. 3% for Reliance Steel & Aluminum Co. (RS). AZZ Inc. (AZZ) offers the better valuation at 14. 4x trailing P/E (22. 1x forward), making it the more compelling value choice. Analysts rate AZZ Inc. (AZZ) a "Buy" — based on 12 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, AZZ Inc.

(AZZ) is the cheapest at 14. 4x versus Caterpillar Inc. at 48. 4x. On forward P/E, Nucor Corporation is actually cheaper at 17. 8x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: AZZ Inc. wins at 0. 47x versus Caterpillar Inc. 's 1. 31x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Caterpillar Inc.

(CAT) delivered a total return of +327. 7%, compared to +159. 3% for Reliance Steel & Aluminum Co. (RS). Over 10 years, the gap is even starker: CAT returned +1169% versus AZZ's +166. 5%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Reliance Steel & Aluminum Co.

(RS) is the lower-risk stock at 0. 75β versus Caterpillar Inc. 's 1. 67β — meaning CAT is approximately 123% more volatile than RS relative to the S&P 500. On balance sheet safety, AZZ Inc. (AZZ) carries a lower debt/equity ratio of 5% versus 2% for Caterpillar Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Nucor Corporation (NUE) is pulling ahead at 5.

7% versus 3. 3% for Reliance Steel & Aluminum Co. (RS). On earnings-per-share growth, the picture is similar: AZZ Inc. grew EPS 486. 6% year-over-year, compared to -14. 6% for Caterpillar Inc.. Over a 3-year CAGR, AZZ leads at 7. 6% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

AZZ Inc.

(AZZ) is the more profitable company, earning 19. 2% net margin versus 5. 2% for Reliance Steel & Aluminum Co. — meaning it keeps 19. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: CAT leads at 16. 6% versus 7. 2% for RS. At the gross margin level — before operating expenses — CAT leads at 32. 3%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, AZZ Inc. (AZZ) is the more undervalued stock at a PEG of 0. 47x versus Caterpillar Inc. 's 1. 31x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Nucor Corporation (NUE) trades at 17. 8x forward P/E versus 36. 9x for Caterpillar Inc. — 19. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AZZ: 1. 7% to $153. 50.

All stocks in this comparison pay dividends.

Reliance Steel & Aluminum Co. (RS) offers the highest yield at 1. 2%, versus 0. 5% for AZZ Inc. (AZZ).

For long-horizon retirement investors, Reliance Steel & Aluminum Co.

(RS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 75), 1. 2% yield, +489. 2% 10Y return). Both have compounded well over 10 years (RS: +489. 2%, AZZ: +166. 5%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (AZZ (Industrials) and CAT (Industrials) and NUE (Basic Materials) and RS (Basic Materials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: AZZ is a small-cap deep-value stock; CAT is a large-cap quality compounder stock; NUE is a mid-cap quality compounder stock; RS is a mid-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.