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Mizuno built its name on soft forged blades, so a cast iron from them always raises an eyebrow. The JPX 900 Hot Metal is exactly that. It uses Chromoly 4140M steel, which Mizuno could pour thin enough to make a fast, springy face, and the result is an iron aimed at golfers who want yards and forgiveness rather than the buttery feel of a muscleback.
This sits at the game-improvement end of the 2016 JPX 900 family, below the JPX 900 Forged and the Hot Metal Pro. The 7-iron comes in at 29 degrees, which is strong. A traditional 7-iron lived around 34 to 35 degrees, so Mizuno bent these lofts several degrees to chase distance. You will hit it farther than your old set, though a lot of that gain is loft on the label, not free speed.
The cavity back and wider sole do the forgiveness work. Mishits hold their line better and the ball gets up without much effort. If you came to Mizuno expecting thin, precise blade feel, this is not that iron, and it does not try to be.
In short
The Mizuno JPX 900 Hot Metal (2016) is a forgiving game-improvement iron built for consistent distance. The set runs 4-iron to PW with a 29° 7-iron. It carries a $849 MSRP.
Last-gen value buy
The newer JPX 925 Hot Metal (2025) is already out, so the JPX 900 Hot Metal now sells at closeout pricing. If you do not need the very latest tech, this is the smart-money pick.
Based on release timing and this line's typical refresh cycle, not a live price quote.
Modeled from the $849 original MSRP and a 10-year-old release (about 12% of MSRP retained used).
Used market value
$85 - $115
Private sale, fair to like-new
Trade-in value
$50 - $80
What a shop typically pays
Get an exact quote
Estimate only, from a depreciation model, not a live quote. Search “Mizuno JPX 900 Hot Metal” on the sites above for the real number, which varies with condition, shaft, and demand.
The JPX 900 Hot Metal is the 1st of 6 generations Mizuno has released in this line, from the JPX 900 Hot Metal (2016) to the JPX 925 Hot Metal (2025). It is where the line started. The JPX 919 Hot Metal (2018) replaced it.
| 4i | 5i | 6i | 7i | 8i | 9i | PW |
|---|---|---|---|---|---|---|
| 19.0° | 22.0° | 25.0° | 29.0° | 33.0° | 38.0° | 43.0° |
Stock steel shaft. Lofts are approximate and subject to manufacturing tolerances.
Typical carry by swing speed, adjusted for this set's actual lofts. Your numbers will vary with strike, shaft, and conditions.
| Club | Loft | Moderate swing~142y 7-iron | Average swing~157y 7-iron | Faster swing~171y 7-iron |
|---|---|---|---|---|
| 4-iron | 19° | 168 y | 186 y | 203 y |
| 5-iron | 22° | 161 y | 178 y | 194 y |
| 6-iron | 25° | 152 y | 168 y | 183 y |
| 7-iron | 29° | 142 y | 157 y | 171 y |
| 8-iron | 33° | 132 y | 146 y | 159 y |
| 9-iron | 38° | 121 y | 134 y | 146 y |
| PW | 43° | 111 y | 123 y | 134 y |
Carry distances are modeled from TrackMan-based norms scaled to each club's loft, not measured for this exact model.
The face is Chromoly 4140M, a material Mizuno chose because it can be made thinner than standard stainless while staying strong, which lets the face flex more at impact for ball speed. The cast construction is a departure from Mizuno's grain-flow-forged reputation, and it is what makes the aggressive strong lofts and thin face possible at this price. Sole width is generous and the top line is thicker than the Forged model, both cues that tell you this is built for help, not shot shaping. The 4-iron starts at 19 degrees and the set runs down to a 43-degree pitching wedge, a loft structure that pushes gapping toward added wedges at the bottom of the bag.
The Mizuno JPX 900 Hot Metal's 7-iron is lofted at 29° - moderately strong - slightly stronger than traditional lofts. For a golfer with an 85-95 mph swing speed, this projects to a 7-iron carry of approximately 154-164 yards. The 5-iron (22°) to 7-iron gap of 7° is well-gapped, which may create overlapping distance windows with similarly lofted fairway woods or hybrids. The pitching wedge at 43° provides a conventional loft window that pairs cleanly with a 50-52° gap wedge.
It is cast, not forged. Mizuno used Chromoly 4140M steel that it could pour into a thin, fast face. That is different from Mizuno's grain-flow-forged irons like the JPX 900 Forged, which are made from a single billet and feel softer.
Mizuno strengthened the lofts to add distance. A traditional 7-iron sat around 34 to 35 degrees, so at 29 this club is roughly a loft and a half stronger. Expect longer carry than your old 7-iron, but understand part of that is the number stamped on the sole.
The Forged is softer feeling, more workable, and aimed at better players. The Hot Metal is more forgiving, launches easier, and hits it farther thanks to the faster face and stronger lofts. If you want feedback and control, go Forged. If you want help and distance, go Hot Metal.
Probably. The pitching wedge is 43 degrees, which is stronger than the standard 46 to 48 range. That leaves a wide gap down to a typical sand wedge, so most players will want a 48 or 50 degree gap wedge to keep distances even.
Low handicappers and shot shapers who want thin, forged feel and precise distance control. The wider sole, thicker top line, and cast face give up feedback for forgiveness, so a strong ball striker will feel like it hides information they want.
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Other game improvement iron models from different brands, closest to its model year.
Use as your baseline in the recommendation tool, or compare side-by-side with another set.