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ASTM A105: carbon steels material property data


The following specifications cover Carbon Steels A105

* ASTM A105 (Forging - Open Die)
* ASTM A695 (B)
* UNS K03504

Chemical composition

C% max 0,35
P% max 0,035
S% max 0,04
Cu% max 0,4
Ni% max 0,4
Cr% max 0,3
Mo% max 0,12
V% max 0,08
Nb% max 0,02
The sum of copper (Cu), chromium (Cr), nickel (Ni) and molybdenum (Mo) shall not exceed 1,00%
The sum of chromium (Cr) and molybdenum (Mo) shall not exceed 0,32%
For each reduction of 0,01% below the specified carbon maximum (0,35), an increase of 0,06% manganese above the specific
maximum (1,05%) will be permitted up to a maximum of 1,35%
Calcium (Ca) treatment may be supplied on request
Al min 0,020%
Carbon Equivalent CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/ 15 max 0,47

Principal Design Features

A 105 is an ASTM specification dealing with forged carbon steel piping components. The steel alloy involved is a low carbon, manganese and silicon containing steel similar to AISI 1330, but with lower manganese content.
This ASTM specification covers carbon steel forgings for piping applications such as flanges and fittings.

Machinability is good as for any of the low alloy steels.


This specification covers forming by forging only.


The steel covered by this specification is weldable. Weld procedures used must be qualified with Section IX of the ASME Boiler and Pressure Vessel Code.

Heat Treatment

Heat treatment is not required except for flanges or piping components as called out in ASTM A 105/A section 5.1. When heat treatment is required it consists of normalizing at 1550 to 1700 F and air cooled. Quenching direct from the forging heating shall be followed by a temper at 1100 F and air cool.


This is a forging alloy that would be forged at temperatures in the range of 2200 to 1700 F followed by quenching and tempering or normalizing.

Hot Working

See "Forging".

Cold Working

This specification does not cover cold working other than machining.


Annealing may be done by first allowing the forged parts to cool to below 1000 F and then reheat to between 1550 and 1700 F followed by slow furnace cooling.


Not applicable.


Tempering is done at 1100 F followed by air cooling.


See "Heat Treatment" and "Tempering".

Other Comments

Physical and mechanical properties are similar to those for AISI 1330 steel. Consult ASTM A105 for requirements as to strength and hardness.

Physical Data :

Density (lb / cu. in.) 0.284
Specific Gravity 7.9
Specific Heat (Btu/lb/Deg F - [32-212 Deg F]) 0.107
Melting Point (Deg F) 2740
Thermal Conductivity 360
Mean Coeff Thermal Expansion 6.7
Modulus of Elasticity Tension 30
Modulus of Elasticity Torsion 11

Comments :

3 Comments to “ASTM A105: carbon steels material property data”

Open die forgings said... on 

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Van Hoat said... on 

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John Galt Steel said... on 

Great info, we stock A105 round bar in 1" od up to 26" od at

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