AISI 1030 Carbon Steel (UNS G10300)

Topics Covered

Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
     Machinability
     Forming
     Welding
     Heat Treatment
     Forging
     Hot Working
     Cold Working
     Annealing
     Hardening
Applications

Introduction

Carbon steels are those that have carbon as the main alloying element. They also contain up to 0.4% silicon and 1.2% manganese. In addition, the residual elements such as copper, molybdenum, aluminium, chromium and nickel are present in these steels.

The AISI 1030 steel is a high carbon steel, and has moderate strength and hardness in the as-rolled condition. It can be hardened and strengthened by cold work. It also has fair machinability, ductility and good weldability.

The following sections will discuss in detail about AISI 1030 carbon steel.

Chemical Composition

The chemical composition of AISI 1030 carbon steel is outlined in the following table.

Element Content (%)
Iron, Fe 98.67-99.13
Manganese, Mn 0.60-0.90
Carbon, C 0.270-0.340
Phosphorous, P ≤ 0.040
Sulfur, S ≤ 0.050

Physical Properties

The physical properties of AISI 1030 carbon steel are tabulated below.

Properties Metric Imperial
Density 7.85 g/cc 0.284 lb/in3
Melting point 1510°C 2750°F

Mechanical Properties

The following table shows mechanical properties of the cold drawn AISI 1030 carbon steel.

Properties Metric Imperial
Tensile strength, ultimate 525 MPa 76100 psi
Tensile strength, yield 440 MPa 63800 psi
Modulus of elasticity 190-210 GPa 29700-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poissons ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 12% 12%
Reduction of area 35% 35%
Hardness, Brinell 149 149
Hardness, Knoop (converted from Brinell hardness) 169 169
Hardness, Rockwell B (converted from Brinell hardness) 80 80
Hardness, Vickers (converted from Brinell hardness) 155 155
Machinability (based on AISI 1212 steel. as 100 machinability) 70 70

Thermal Properties

The thermal properties of AISI 1030 carbon steel are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@15-75°C/59-167°F) 11.7 µm/m°C 6.50 µin/in°F
Thermal Conductivity 51.9 W/mK 360 BTU in/hr.ft2.°F

Other Designations

Other designations that are equivalent to AISI 1030 carbon steel include the following:

ASTM A29 (1030) ASTM A546 (1030) SAE J403 (1030)
ASTM A510 (1030) ASTM A576 (1030) SAE J412 (1030)
ASTM A512 (1030) ASTM A682 (1030) DIN 1.1172
ASTM A513 (1030) ASTM A830 UNI CB 35
ASTM A519 (1030) MIL S-11310 (CS 1030) ASTM A108
ASTM A544 (1030) FED QQ-S-700(C1030) FED QQ-S-635
ASTM A545 (1030) SAE J1397 (1030)

Fabrication and Heat Treatment

Machinability

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The machinability rating of AISI 1030 carbon steel is 70.

Forming

The formability of AISI 1030 carbon steel in the annealed condition is good.

Welding

AISI 1030 carbon steel can be welded by all welding methods. It is advisable to pre-heat the heavy sections of this steel at 149 to 260°C (300 to 500°F) and then post-heat at 593 to 649°C (1100 to 1200°F) for welding.

Heat Treatment

AISI 1030 carbon steel is heat treated at 816 to 871°C (1500 to 1600°F) and quenched in water. This process is followed by a tempering treatment.

Forging

AISI 1030 carbon steel is forged at 982 to 1260°C (1800 to 2300°F).

Hot Working

Hot working of AISI 1030 carbon steel is performed at 93 to 482°C (200 to 900°F).

Cold Working

In the annealed condition, cold working of AISI 1030 steel may be performed by conventional methods. After annealing, a full or stress relief anneal may be required.

Annealing

Annealing of AISI 1030 carbon steel is carried out at 871 to 982°C (1600 to 1800°F) and then slow cooled in the furnace. Stress relief annealing may be carried out at 538°C (1000°F).

Hardening

AISI 1030 carbon steel is hardened by heat treatment or cold working.

Applications

AISI 1030 carbon steel is suitable for manufacturing machinery parts.

Comments

  1. tejendra badiwal tejendra badiwal India says:

    where we can find dealer of aisi 1030 in Jaipur??

  2. ASSYA HASNAOUI ASSYA HASNAOUI Morocco says:

    Is AISI 30 equivalent to GS350?

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

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