1030 Bright Carbon Steel Bar
|1030 is a medium tensile low hardenability carbon steel generally supplied in the cold drawn or turned and polished, or centreless ground condition, with a typical tensile strength range 500 - 850 Mpa, and Brinell hardness range 150 - 245.Characterised by good machinability, reasonable weldability with medium strength plus good ductility.
1030 has a low through hardening capability with sections up to around 40mm only generally responding satisfactorily. It is therefore generally used in the as supplied condition. Flame or induction hardening is also marginal due to its lower carbon content, nor will it respond satisfactorily to nitriding due to a lack of suitable alloying elements, and carburising while possible is not generally recommended.
1030 is used by all industry sectors for applications requiring higher strength than 1020 can provide or often for applications making use of its centreless ground finish.
Typical applications are: Axles, Connecting Rods, Guide Rods, Hydraulic Shafts, Motor Shafts, Rams, Spindles, Studs etc.
|Colour Code||Stocked Sizes|
White (Bar End)
|8 mm - 140 mm Dia|
||3/16" - 7" Dia|
|Australia||AS 1443 - 1994 M1030|
|Germany||W.Nr 1.0528 C30
W.Nr 1.1178 CK30
|Great Britain||BS970 - Part 3 - 1991 080M30
BS970 - 1955 EN5, 6, 6a
|Japan||JIS G 4051 S30C|
ASTM A29/A29M - 91 1030
UNS G 10300
|Min. %||Max. %|
|Typical Mechanical Properties - Cold Drawn, Turned and Polished and Centreless Ground Condition|
|Cold Drawn Size mm||up to 16mm||17 - 38mm||39 - 63mm||Turned & Polished, & Precision Ground (all sizes)|
|Tensile Strength Mpa||Min||560||540||520||500|
|Yield Strength Mpa||Min||440||430||410||250|
|Elongation in 50mm %||Min||10||11||12||20|
|Typical Mechanical Properties - Hardened by Water Quench at 850 oC - 880 oC and Tempered Between 540oC - 680 oC|
|Cold Drawn Size mm||up to 16mm||17 - 40mm||41 - 63mm|
|Tensile Strength Mpa||Min||620||580||520|
|Yield Strength Mpa||Min||420||365||300|
|Elongation in 50mm %||Min||13||16||17|
|Heat to 1100 oC - 1200 oC maximum, hold until temperature is uniform throughout the section and commence forging.
Do not forge below 900 oC
Finished forgings may be air cooled.
|Heat to 850 oC - 900 oC hold until temperature is uniform throughout the section, and cool in furnace.|
|Heat to 850 oC - 910 oC hold until temperature is uniform throughout the section, soak for 10 - 15 minutes per 25mm of section, and quench in water or brine.
Temper immediately while still hand warm.
|Heat to 870 oC - 920 oC hold until temperature is uniform throughout the section, soak for 10 - 15 minutes per 25mm of section, and cool in still air.|
|Heat to 600 oC - 700 oC hold until temperature is uniform throughout the section, soak for 1 hour per 25mm of section, and cool in still air.|
|Re heat to 540 oC - 680 oC as required, hold until temperature is uniform throughout the section, soak for 1 hour per 25mm of section, and cool in still air.|
|Notes on Heat Treatment|
|Heating temperatures, rate of heating, cooling and soaking times will vary due to factors such as work piece size/shape, also furnace type employed, quenching medium and work piece transfer facilities etc.
Please consult your heat treater for best results.
|1030 has very good machinability in all as supplied conditions and all operations such as drilling, milling, tapping and turning etc. can be carried out satisfactorily as per machine manufacturers recommendations for suitable tool type, feeds and speeds.|
|1030 is readily weldable in all as supplied conditions providing the correct procedure is employed. Following welding the work piece immediately upon cooling to hand warm should be stress relieved at 600 oC - 700 oC if possible.
NB. Welding in the hardened and tempered condition is not recommended.
|Low carbon electrodes are recommended.
Please consult your welding consumables supplier for suitable electrodes etc.Welding can be carried out by any of the standard welding processes.
Pre-heat larger sections up to 300 oC.
Post-weld slow cool in sand, dry lime or still air.