Super Alloy Nitronic 30™ (UNS S20400)

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:

  • ASTMA240
  • ASTMA666

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.

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Submit