---
kind: "section"
citation: "46 C.F.R. § 56.60-15"
title: "46"
number: "56.60-15"
heading: "Ductile iron."
url: "https://uscodex.org/cfr/46/56.60-15"
---

# §56.60-15. Ductile iron.

- (a) Ductile cast iron components made of material conforming to ASTM F1155 (incorporated by reference, see [§ 56.01-2](/cfr/46/56.01-2.md)) may be used within the service restrictions and pressure-temperature limitations of UCD-3 of Section VIII of the ASME BPVC (incorporated by reference; see [§ 56.01-2](/cfr/46/56.01-2.md)).
- (b) Ductile iron castings conforming to ASTM F1155 may be used in hydraulic systems at pressures in excess of 7500 kPa (1000 psi) gage, provided the following:
  - (1) The castings receive a ferritizing anneal when the as-cast thickness does not exceed 1 inch;
  - (2) Large castings for components, such as hydraulic cylinders, are examined as specified for a casting quality factor of 90 percent in accordance with UG-24 of Section VIII of the ASME BPVC; and
  - (3) **The castings are not welded, brazed, plugged, or otherwise repaired.**
- (c) After machining, ductile iron castings must be hydrostatically tested to twice their maximum allowable working pressure and must show no leaks.
- (d) Ductile iron castings exhibiting less than 12 percent elongation in 50 millimeters (2 inches) when subjected to a tensile test must meet the requirements for cast iron in this part.

## Notes

### Amendments

[CGD 77-140, 54 FR 40612, Oct. 2, 1989, as amended by CGD 95-027, 61 FR 26001, May 23, 1996; USCG-2000-7790, 65 FR 58460, Sept. 29, 2000; USCG-2003-16630, 73 FR 65183, Oct. 31, 2008; USCG-2020-0634, 89 FR 50153, June 12, 2024]

### Authority

Authority: 33 U.S.C. 1321(j), 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 68-82, 33 FR 18843, Dec. 18, 1968, unless otherwise noted.

### Amendments

[CGD 77-140, 54 FR 40612, Oct. 2, 1989, as amended by CGD 95-027, 61 FR 26001, May 23, 1996; USCG-2000-7790, 65 FR 58460, Sept. 29, 2000; USCG-2003-16630, 73 FR 65183, Oct. 31, 2008; USCG-2020-0634, 89 FR 50153, June 12, 2024]