Stainless Steel – Grade 403 (UNS S40300)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Applications

Introduction

Stainless steels are high-alloy steels with good corrosion resistance due to the presence of large amounts of chromium in these steels. Most of the stainless steels contain about 10% of chromium.

Stainless steels are available in three different groups based on their crystalline structure. These groups include martensitic, austenitic and ferritic. The combination of martensitic and ferritic steels forms a fourth group of stainless steels known as precipitation-hardened steels.

The following datasheet provides an overview of grade 403 stainless steel.

Chemical Composition

The chemical composition of grade 403 stainless steel is outlined in the following table.

Element Content (%)
Iron, Fe 86
Chromium, Cr 12.3
Manganese, Mn 1.0
Silicon, Si 0.50
Carbon, C 0.15
Phosphorous, P 0.040
Sulfur, S 0.030
Carbon, C 0.15

Physical Properties

The following table shows the physical properties of grade 403 stainless steel.

Properties Metric Imperial
Density 7.80 g/cm3 0.282 lb/in³

Mechanical Properties

The mechanical properties of grade 403 annealed stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 485 MPa 70300 psi
Yield strength (@strain 0.200 %) 310 MPa 45000 psi
Fatigue Strength (annealed, @diameter 25mm/0.984 in) 275 MPa 39900 psi
Shear modulus (typical for steel) 76.0 GPa 11000 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 25.00% 25.00%
Izod impact (tempered) 102 J 75.2 ft-lb
Hardness, Brinell (converted from Rockwell B hardness) 139 139
Hardness, Knoop (converted from Rockwell B hardness) 155 155
Hardness, Rockwell B 80 80
Hardness, Vickers (converted from Rockwell B hardness) 153 153

Thermal Properties

The thermal properties of grade 403 stainless steel are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0-100°C/32-212°F) 9.90 µm/m°C 5.50 µin/in°F
Thermal conductivity (@500°C/932°F) 21.5 W/mK 149 BTU in/hr.ft².°F

Other Designations

Equivalent materials to grade 403 stainless steel are given in the table below.

AISI 403 AISI 614 ASTM A176 ASTM A276 ASTM A473
ASTM A314 ASTM A479 ASTM A511 ASTM A580 DIN 1.4000
QQ S763 AMS 5611 AMS 5612 FED QQ-S-763 MIL SPEC MIL-S-862
SAE 51403 SAE J405 (51403)

Applications

Grade 403 stainless steel is used in turbine parts and compressor blades.

Date Added: Sep 12, 2012 | Updated: Jun 11, 2013
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