Nov 16 2012
Topics Covered
Introduction
Chemical Composition
Mechanical Properties
Other Designations
Fabrication and Heat Treatment
Annealing
Welding
Forging
Forming
Machinability
Hardening
Applications
Introduction
Super alloys or high performance alloys are of three types such as iron-based, cobalt-based and nickel-based alloys. These alloys can be strengthened by precipitation hardening, solid-solution hardening and work hardening methods. Super alloys can function under high mechanical stress and high temperatures, and also in places that require high surface stability. Super alloys are of different shapes and have good oxidation and creep resistance.
Nitronic 30™ is a combination of corrosion resistance, strength and wet abrasion resistance. The following datasheet provides an overview of Nitronic 30™.
Chemical Composition
The chemical composition of Nitronic 30™ is outlined in the following table.
|
Element |
Content (%) |
|
Manganese, Mn |
15.0-17.0 |
|
Chromium, Cr |
15.00-17.00 |
|
Nickel, Ni |
1.50-3.00 |
|
Silicon, Si |
1 |
|
Nitrogen, N |
0.15-0.30 |
|
Carbon, C |
0.03 |
|
Sulfur, S, |
0.03 |
|
Iron, Fe |
Remainder |
Mechanical Properties
The mechanical properties of Nitronic 30™ are displayed in the following table.
|
Properties |
Metric |
Imperial |
|
Tensile strength |
655 MPa |
95 Ksi |
|
Yield strength |
330 MPa |
48 KSi |
|
Elongation at break |
35% |
35% |
|
Hardness, Brinell |
241 |
241 |
|
Hardness, Rockwell B |
100 |
100 |
Other Designations
Equivalent materials to Nitronic 30™ are:
Fabrication and Heat Treatment
Annealing
Nitronic 30™ is soaked at 1038-1121°C (1900-2050°F) followed by rapid quenching in water or air.
Welding
Nitronic 30™ is a nitrogen strengthened and austenitic steel possessing high strength and corrosion resistance. This alloy can be readily welded and is non-magnetic even after rough forming operations.
Forging
Nitronic 30™ is heated to 1093°C (2000°F), soaked and again heated to 1176°C (2150°F) and finally equalized before being forged.
Forming
In the forming process Nitronic 30™ need not be per-heated. Commonly used welding techniques can be used to form this alloy.
Machinability
Commonly used machining techniques can be used for Nitronic 30™. Good machining results can be obtained based on the utilization of resulfurized lubricant and positive and slow speeds. Breakers and curlers are used in the welding process due to the thready and tough texture of the chips.
Hardening
Nitronic 30™ can be hardened through a cold working process and hardening will not take place when this alloy is exposed to thermal treatment.
Applications
Nitronic 30™ is commonly used in hose clamps, sewage plant structures, fasteners, handling equipment for bulk solids and structural components in transportation equipment.