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AISI 1095 Carbon Steel (UNS G10950)

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
     Tempering
     Hardening
Applications

Introduction

Carbon is the main alloying element present in carbon steels. They also contain 0.4% of silicon and 1.2% of manganese. Elements such as nickel, copper, aluminium, and molybdenum are present in small traces. AISI 1095 carbon steel is brittle, and has high hardness and strength.

The following datasheet gives an overview of AISI 1095 Carbon Steel.

Chemical Composition

The following table shows the chemical composition of AISI 1095 carbon steel.

Element Content (%)
Iron, Fe 98.38 - 98.8
Carbon, C 0.90 - 1.03
Sulfur, S ≤ 0.050
Phosphorous, P ≤ 0.040
Manganese, Mn 0.30 - 0.50

Physical Properties

The physical properties of AISI 1095 carbon steel are outlined in the following table.

Properties Metric Imperial
Density 7.85 g/cm3 0.284 lb/in³
Melting point 1515°C 2760°F

Mechanical Properties

The mechanical properties of cold drawn AISI 1095 carbon steel are outlined in the following table.

Properties Metric Imperial
Tensile strength 685 MPa 99400 psi
Yield strength 525 MPa 76100 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) 10% 10%
Reduction of area 40% 40%
Hardness, Brinell 197 197
Hardness, Knoop (converted from Brinell hardness) 219 219
Hardness, Rockwell B (converted from Brinell hardness) 92 92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 13 13
Hardness, Vickers (converted from Brinell hardness) 207 207
Machinability (based on AISI 1212 steel. as 100 machinability) 45 45

Thermal Properties

The thermal properties of AISI 1095 carbon steel are given in the following table.

Thermal Properties Metric Imperial
Thermal expansion co-efficient (@ 0.000-100°C/32-212°F) 11 µm/m°C 6.11 µin/in°F
Thermal conductivity (typical steel) 49.8 W/mK 346 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to AISI 1095 carbon steel include:

AMS 5121 ASTM A29 (1095) ASTM A713 (1095) MIL S-7947 SAE J403 (1095)
AMS 5122 ASTM A510 (1095) ASTM A830 MIL S-8559 SAE J412 (1095)
AMS 5132 ASTM A576 (1095) DIN 1.1274 QQ S700 (C1095) AMS 5121C
AMS 7304 ASTM A682 (1095) MIL S-16788 (C10) SAE J1397 (1095) AMS 5122C
AMS 5132D

 

Fabrication and Heat Treatment

Machinability

The machinability rate of AISI 1095 carbon steel is 45.

Forming

AISI 1095 carbon steel can be formed using conventional techniques. It needs more force that that of the low carbon steels to perform this process.

Welding

AISI 1095 carbon steel can be welded using all welding techniques. It is pre-heated at 260 to 315°C (500 to 600°F) and post-heated at 648 to 788°C (1200 to 1450°F)

Heat Treatment

AISI 1095 carbon steel can be hardened at 899°C (1650°F). It is then quenched in oil followed by tempering. The cutting edge of cutting tools can be hardened by heating and quenching in order to maintain the toughness of the steel.

Forging

AISI 1095 carbon steel can be forged at 955 to 1177°C (1750 to 2150°F). Before performing this process, it is annealed at (1650°F) and slowly cooled in order to homogenize the steel.

Hot working

AISI 1095 carbon steel can be hot worked at 94 to 483°C (200 to 900°F)

Cold working

Cold working of AISI 1095 carbon steel needs greater force than that of the low carbon steels.

Annealing

AISI 1095 carbon steel can be annealed at 899°C (1650°F) followed by slowly cooling in the furnace.

Tempering

AISI 1095 carbon steel can be tempered at 372 to 705°C (700 to 1300°F). It has Rockwell C 55 hardness.

Hardening

AISI 1095 carbon steel can be hardened by cold working or heat treatment.

Applications

AISI 1095 carbon steel can be used in springs or cutting tools, which requires sharp cutting edges such as grass or grain cutting tools.

Date Added: Aug 27, 2012 | Updated: Jun 11, 2013
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