AISI 1021 Carbon Steel (UNS G10210)

Topics Covered

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

Introduction

Carbon steels are steels that contain only carbon as their major alloying element. These steels also contain small quantities of copper, nickel, molybdenum, aluminium and chromium. Traces of 0.4% silicon and 1.2% manganese can also be found in these steels.

The following datasheet provides an overview of AISI 1021 carbon steel.

Chemical Composition

The chemical composition of AISI 1021 carbon steel is outlined in the following table.

Element Content (%)
Iron, Fe 98.78-99.23
Manganese, Mn 0.60-0.90
Carbon, C 0.17-0.230
Sulfur, S ≤ 0.050
Phosphorous, P ≤ 0.040

Physical Properties

The following table shows the physical properties of AISI 1021 carbon steel.

Properties Metric Imperial
Density 7.858 g/cm3 0.2839 lb/in³

Mechanical Properties

The mechanical properties of cold drawn AISI 1021 carbon steel are displayed in the following table.

Properties Metric Imperial
Tensile strength 470 MPa 68200 psi
Yield strength 395 MPa 57300 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80.0 GPa 11600 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) 15.00% 15.00%
Reduction of area 40.00% 40.00%
Hardness, Brinell 121 121
Hardness, Knoop (converted from Brinell hardness) 140 140
Hardness, Rockwell B (converted from Brinell hardness) 68 68
Hardness, Vickers (converted from Brinell hardness) 126 126
Machinability (based on AISI 1212 steel as 100 machinability. The machinability of Group I bar, rod, and wire products can be improved by cold drawing.) 70 70

Thermal Properties

The thermal properties of AISI 1021 carbon steel are given in the following table.

Properties Metric Imperial
Thermal conductivity (typical steel) 49.8 W/mK 346 BTU in/hr.ft².°F

Other Designations

Equivalent materials to the AISI 1021 carbon steel are given in the following table.

ASTM A29 ASTM A510 ASTM A512 ASTM A513
ASTM A545 ASTM A548 ASTM A576 ASTM A635
ASTM A794 ASTM A830 SAE J1397 SAE J403
ASTM A519 SAE J414 SAE J412 ASTM A659

Applications

AISI 1021 carbon steel is mostly used in extruding and cold heading processes.

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