Nitronic 60 Alloy Stainless Steel Round Bar / Bright Polishing SS
Bar H7 H9 H11 Tolerance Diameter 4 - 60mm
Nitronic 60 is truly an all purpose metal. This fully austenitic
alloy was originally designed as a temperature alloy, and
subsequently has good high temperature properties for temperatures
around 1800ºF. The oxidation resistance of Nitronic 60 is similar
to Type 309 S.S., and far superior to Type 304S.S. This grade is
best known for its wear and galling resistance.
The additions of Silicon and Manganese have given this alloy a
matrix to inhibit wear, galling, and fretting even in the annealed
condition. Higher strengths are attainable through cold working the
material and is still fully austenitic after severe cold-working.
This working does not enhance the anti-galling properties as is
normal for carbon steels and some stainless steels. The benefit to
the cold or hot work put into the material is added strength and
hardness, and the wear resistance does not decrease noticeably.
Chromium and Nickel additions give it comparable corrosion to 304
and 316 stainless steels, while having approximately twice the
yield strength. The high mechanical strength in annealed parts
permits use of reduced cross sections for weight, and cost
reductions through the use of thinner stock.
Chemistry of Nitronic 60 Alloy
Chemical Requirements |
|---|
| Ni | Cr | Mn | Si | N | Mo | C |
Max | 9.00 | 18.00 | 9.00 | 4.5 | 0.18 | 0.75 | 0.10 |
|---|
Min | 8.00 | 16.00 | 7.00 | 3.5 | 0.08 |
|
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|---|
Characteristics
Corrosion Properties
The corrosion resistance of Armco NITRONIC 60 Stainless Steel falls
between that of types 304 and 316. However, experience shows that
in a wear system, a galling or siezure failure occurs first,
followed by dimensional loss due to wear, and finally corrosion.
Galling and wear must be the first concerns of the design engineer.
Although the general corrosion resistance of NITRONIC 60 is not
quite as good as Type 316, it does offer better chloride pitting
resistance, stress corrosion cracking resistance and crevice
corrosion resistance than Type 316 in laboratory conditions.
Corrosion tests are not normally performed with NITRONIC 60 High
Strength.
Corrosion Resistance
Nitronic 60’s uniform corrosion resistance is better than 304
stainless in most environments. The yield strength of Nitronic 60
is nearly twice that of 304 and 316 stainless steels. Chloride
pitting resistance is superior to that of type 316 stainless;
Nitronic 60 provides excellent high temperature oxidation
resistance and low temperature impact.
Applications using Nitronic 60 are valve stems, seats, and trim,
fastening systems, screening, pins, bushings and roller bearings,
pump shafts and rings. Other uses include wear plates, rails
guides, and bridge pins.
Wear Resistance
This alloy provides a significant lower cost way to fight wear and
galling compared to Nickel or Cobalt based alloys.
Wear Compatibility of NITRONIC 60 wear compared to Cobalt 6B and
17-4PH Against Various Alloys |
| Alloy | Hardness | 17-4 PH
(HRC 43) | NIT 60
(HRB 95) | Cobalt 6B
(HRC 48) |
| 304 | HRB 99 | 24.7 | 6 | 3.1 |
| 316 | HRB 91 | 18.5 | 4.3 | 5.5 |
| 17-4 PH | HRC 31.5 | 66.1 | 4.9 | 2.7 |
| 17-4 PH | HRC 43 | 52.8 | 5.4 | 3.8 |
| NIT 32 | HRB 95 | 17.2 | 3.2 | 2 |
| NIT 50 | HRB 99 | 15.7 | 3.5 | 2.9 |
| NIT 60 | HRB 95 | 5.4 | 2.8 | 1.9 |
| Cobalt 6B | HRC 48 | 3.8 | 1.9 | 1 |
| Chrome Plate | --- | 3.3 | 2.1 | 0.3 |
| Silicon Bronze | HRB 93 | 2 | 2.2 | 1.9 |
| K-500 Monel | HRC 34 | 34.1 | 22.9 | 18.8 |
| 416 | HRC 24 | --- | 5.5 | 43 |
| 431 | HRC 32 | --- | 3 | 1 |
| Waspaloy | HRC 36 | --- | 3.1 | 2.4 |
| IN 718 | HRC 38 | --- | 3.1 | 2.7 |
| IN X-750 | HRC 36 | --- | 5.5 | 8 |
TYPICAL APPLICATIONS
Commercial applications for this engineering material include:
- Bridge pins and hangers
- Valve stems, seats and trim
- Compressor shafts
- Boat shafting and mooring pins
- Bolts/nuts
- Pump wear rings
- Chain-drive systems – pins, bushings, wear rails & roller bearings
- Automotive valves
