This is a part of a steam machine in a museum of steam. I was adviced to take it again and develop it differently to get effect of large well defined grain (3200 ISO, Rodinal 1:25 30 degrees celsius) but the museum was recently flooded and is now closed...
This is maybe not your best picture, but I think it could have been, and it can still be, I think... provided you try a few crops. The way I understand texture photography is that it needs side-lighting to bring up the textures, and that's really fantastic here. The 2nd thing that it need is a perfect composition, and I feel that's missng here. The composition is ok, but could be better in my opinion. Right now I see 3 "hard" elements, and a 4th, which is softer - at the extreme right. 4 is a lot for human eye to comprehend. So, I'd crop off the right side elelement entirely. Then we are left with 3. But I feel our eye then still hesitates, whether to go top left or top right of the remaining frame, and it ends up in the "hole" between the 2 at the top. I still feel uncomfortable with that. So, I would try to crop off the top right element as well. You would be left with only part of the bottom element and the top left element, and with a perfectly squared format. I think that this square would really work very well. Maybe you could test reaction on this and a few other croppings ? Don't give up on this image - it has an extremely strong potential. Looking forward to the next versions. Best regards.
While a photo with grain might also be interesting, I agree this shot is fine without it. The low angle of light emphasizes the texture wonderfully. There are so many interesting shapes to be found here. I particularly like how the circles have turned into cones by the long shadows.