1030 Bright Carbon Steel Bar

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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

White
(Bar End)

Stocked Sizes

Metric 10mm - 150 mm Dia

Imperial 1/2" - 6" Dia

Related Specifications

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

USA

AISI C1030
ASTM A29/A29M - 91 1030
SAE 1030
UNS G 10300

Chemical Composition

Min. %

Max. %

Carbon

0.25

0.35

Silicon

0.35

Manganese

0.30

0.90

Phosphorous

0.05

Sulphur

0.05

Typical Mechanical Properties - Cold Drawn, Turned and Polished and Centreless Ground Condition
	Cold Drawn Size mm	Tensile Strength Mpa Min Max	Yield Strength Mpa Min Max	Elongation in 50mm % Min	Hardness HB
	Cold Drawn Size mm	Tensile Strength Mpa Min Max	Yield Strength Mpa Min Max	Elongation in 50mm % Min	Min	Max
	up to 16mm	560 850	440 670	10	170	245
	17 - 38mm	540 740	430 600	11	160	215
	39 - 63mm	520 710	410 570	12	155	210
	Turned & Polished or Ground
	All Sizes	500 630	250 350	20	150	185
Typical Mechanical Properties - Hardened by Water Quench at 850 ^oC - 880 ^oC and Tempered Between 540 ^oC - 680 ^oC
	Section Size mm	Tensile Strength Mpa Min Max	Yield Strength Mpa Min	Elongation in 50mm % Min	Hardness HB
	Section Size mm	Tensile Strength Mpa Min Max	Yield Strength Mpa Min	Elongation in 50mm % Min	Min	Max
	up to 16mm	620 760	420	13	185	225
	17 - 40mm	580 730	365	16	175	215
	41 - 63mm	520 650	300	17	150	195

Forging

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 Treatment

Annealing

Heat to 850 ^oC - 900 ^oC hold until temperature is uniform throughout the section, and cool in furnace.

Hardening

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.

Normalizing

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.

Stress Relieving

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.

Tempering

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.

Machining

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.

Welding

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.

Welding Procedure

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.

Interlloy believes the information provided is accurate and reliable. However no warranty of accuracy, completeness or reliability is given, nor will any responsibility be taken for errors or omissions.