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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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Grade: AISI 1030
Equivalent Steel: GB 30#, JIS S30C, EN C30/1.0528
AISI 1030 steel is a medium carbon quality structural steel whose chemical composition is built around carbon, silicon, and manganese, with phosphorus and sulfur kept under strict control. Specifically, it contains 0.28%-0.34% carbon and 0.60%-0.90% manganese, while phosphorus and sulfur are limited to 0.040% and 0.050% maximum, respectively. This balanced formulation delivers moderate strength together with good toughness and machinability, making the grade well suited for bolts, gears, shafts, and similar mechanical components.
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1030
Qilu
SAE 1030 steel is a common medium carbon steel grade with nominal carbon content around 0.30%. Produced under ASTM A29/A29M standard, this carbon steel strikes a good balance between strength, ductility and machining performance.
Compared with low carbon steel like 1020 steel, AISI 1030 has higher tensile strength and hardness. Meanwhile, it keeps better weldability and formability than higher carbon grades such as 1040. Our 1030 steel can be supplied in multiple forms: hot rolled, cold drawn, turned & polished, centerless ground round bars, flat bars and steel plates.
It can be hardened by induction hardening or quenching & tempering. Heat treatment can further boost surface hardness and wear resistance for parts under moderate load. As a cost-effective structural steel, 1030 carbon steel is widely chosen by machinery, automotive and general engineering buyers.
Country | USA | Europe | China | Japan |
Standard | ASTM A29 | EN10250-2 | GB/T699 | JIS G4051 |
Grade | 1030 | C30/1.0528 | 30# | S30C |
Grade | C | Si | Mn | P | S | Cr | Mo | Ni |
1030 | 0.28-0.34 | / | 0.60-0.90 | 0.040Max | 0.050Max | / | / | / |
C30/1.0528 | 0.27-0.34 | 0.40Max | 0.50-0.80 | 0.045Max | 0.045Max | 0.40Max | 0.10Max | 0.40Max |
30# | 0.27-0.34 | 0.17-0.37 | 0.50-0.80 | 0.035Max | 0.035Max | 0.25Max | / | 0.30Max |
| S30C | 0.27-0.33 | 0.15-0.35 | 0.60-0.90 | 0.030Max | 0.035Max | / | / | / |
Mechanical properties for C30 open die forgings steel in the normalized and normalized and tempered conditions according to EN10250-2.
Size range | Tensile strength | Yield strength | Alongation | Impact value at RT/J | ||
L | Tr | L | Tr | |||
d≤100 | 480Mpa Min | 250Mpa Min | 21% Min | / | / | / |
100＜d≤250 | 460Mpa Min | 230Mpa Min | 21% Min | / | / | / |
Remark: L= Longitudinal Tr = Transverse
Tensile Strength: 500 – 850 MPa
Yield Strength: 400 – 650 MPa
Brinell Hardness: 150 – 245 HB
Elongation: 12% – 20%
Properties can be adjusted via heat treatment. Induction hardening is suitable for small diameter 1030 steel bars to achieve surface hardness up to HRC 50.
Product type | Size range | Length |
Cold drawn bar | Φ3-Φ80mm | 6000-9000mm |
Hot rolled bar | Φ16-Φ310mm | 6000-9000mm |
Hot forged bar | Φ100-Φ1200mm | 3000-5800mm |
Hot rolled plate/sheet | T:3-200mm; W:1500-2500mm | 2000-5800mm |
Hot Forged block | T: 80-800mm; W: 100-2500mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Hunan Qilu Steel provides AISI 1030 steel in multiple forms (cold drawn bar, hot rolled bar, hot forged bar, hot rolled plate) to meet the processing needs of different industries, with strict control of straightness and dimensional tolerance to ensure assembly precision. Stock sizes are updated daily, with monthly stock of hot rolled/forged bars exceeding 10,000 tons.
Forging: Hot forge between 1100°C – 1200°C. Avoid hot working below 850°C. Cool slowly in dry lime or ash to minimize internal residual stress.
Normalizing: Heat uniformly to 870°C – 910°C followed by air cooling to refine grain structure and improve mechanical uniformity.
Full Annealing: Hold at 840°C – 870°C, then cool slowly in the furnace at controlled rates to achieve maximum machining softness.
Quenching: Heat to 850°C – 890°C, cooling in the water
Tempering: Temper immediately after quenching between 550°C – 660°C to tailor exact hardness and impact toughness values.
AISI 1030 offers reasonable machinability for a medium carbon steel grade. It can be turned, milled, drilled, and processed using conventional machining equipment. Machining performance depends on the material condition and hardness, so selecting suitable cutting parameters and tooling is important, particularly for heat-treated material.
Because AISI 1030 contains more carbon than low-carbon structural steels, welding requires greater attention to preheating, heat input, cooling rate, and post-weld treatment. For critical welded components, the welding procedure should be evaluated according to material thickness, service requirements, and the selected welding method.
1030 steel is generally more suitable for machined and mechanically loaded components than for applications where extensive welding is the primary manufacturing process.
AISI 1030 carbon steel is utilized across a wide spectrum of engineering fields:
Automotive & Transportation: Forged crankshafts, connecting rods, linkage arms, levers, and cold-headed high-strength bolts.
Power Transmission & Motion Control: Medium-duty gears, splines, keyways, machine tool spindles, and drive shafts.
General Fabrication & Heavy Engineering: Tie rods, flange plates, structural pins, machinery housings, and custom brackets.
AISI 1030 contains more carbon than AISI 1018. As a result, 1030 steel generally provides higher strength and hardness, while 1018 offers easier forming and welding characteristics.
For applications where machinability, moderate strength, and economical production are important, both grades may be considered. The final choice should be based on required mechanical properties, manufacturing process, section size, and service conditions.
AISI 1045 contains more carbon than AISI 1030 and can therefore achieve higher strength and hardness after suitable heat treatment. AISI 1030 provides a more moderate property level and can be a suitable alternative when extremely high hardness or strength is not required.
The selection between 1030 and 1045 should consider load requirements, wear resistance, machinability, heat treatment, and overall production cost.
A1: AISI 1030 is a medium carbon steel grade containing approximately 0.30% carbon. It is commonly used for mechanical and engineering components requiring a balance of strength, hardness, and machinability.
A2: AISI 1020 has a lower carbon content (~0.20%), providing higher ductility and easier weldability but lower tensile strength. AISI 1030 (~0.30% carbon) offers noticeably higher yield strength and significantly better response to hardening and heat treatment.
A3: Yes. AISI 1030 can undergo processes such as annealing, normalizing, and quenching and tempering to modify its mechanical properties.
A4: Yes. 1030 steel has reasonable machinability, particularly in annealed or normalized conditions. Machining performance can vary with hardness and heat-treatment condition.
A5: Yes. 1030 steel round bar can be used for shafts, pins, axles, and similar mechanical components when its strength and hardness meet the design requirements.
A6: The main difference is carbon content. AISI 1045 contains more carbon and can generally achieve higher strength and hardness, while AISI 1030 offers a lower-carbon alternative with a more moderate property profile.
We supply AISI 1030 carbon steel with full material test certificates (MTC). All products pass dimension and chemical inspection before shipment. We support small trial orders and bulk container orders. Custom cutting and surface processing can meet your specific drawing requirements. Contact us to get the latest quotation.
