Stainless Steel – Grade 414 (UNS S41400)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations

Introduction

Stainless steels are high-alloy steels that possess good corrosion resistance in comparison with other steels because they contain more chromium.

Based on their crystalline structure, stainless steels are divided into three groups, namely, martensitic, austenitic and ferritic. A combination of martensitic and ferritic steels forms a fourth group known as precipitation-hardened steels.

The following datasheet provides an overview of grade 414 stainless steel.

Chemical Composition

The chemical composition of grade 414 stainless steel is outlined in the following table.

Element Content (%)
Iron, Fe 83.4
Chromium, Cr 12.5
Nickel, Ni 1.88
Manganese, Mn 1.0
Silicon, Si 1.0
Carbon, C 0.15
Phosphorous, P 0.040
Sulfur, S 0.030

Physical Properties

The following table shows the physical properties of grade 414 stainless steel.

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

Mechanical Properties

The mechanical properties of grade 414 stainless steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 1795 MPa 260300 psi
Yield strength (@strain 0.200%) 1013 MPa 146900 psi
Elastic modulus 200 GPa 29000 ksi
Poisson's ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 15% 15%
Izod Impact (hardened and tempered) 30-80 J 22.1-59 ft.lb
Hardness, Brinell (converted from Rockwell C hardness) 459 459
Hardness, Knoop (converted from Rockwell C hardness) 506 506
Hardness, Rockwell C (before testing) 48 48
Hardness, Vickers (converted from Rockwell C hardness) 487 487

Thermal Properties

The thermal properties of grade 414 stainless steel are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@0-100°C/32-212°F) 10.4 µm/m°C 5.78 µin/in°F
Thermal conductivity (@100°C/212°F) 24.9 W/mK 173 BTU in/hr.ft².°F

Other Designations

Equivalent materials to grade 414 stainless steel are:

  • AMS 5615
  • ASTM A276
  • ASTM A314
  • ASTM A473
  • ASTM A511
  • ASTM A580
  • FED QQ-S-763
  • SAE 51414
  • SAE J405 (51414)


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