SAE / AISI 1020 Carbon Steel Bar Technical Data Sheet

1. Product Identification

Product name: SAE / AISI 1020 Carbon Steel — Round / Square / Flat Bars
Womic Steel product code: (insert your internal code)
Delivery form: Hot-rolled, normalized, annealed, cold-drawn (cold-finished) as specified
Typical applications: shafts, pins, studs, axles (case-hardened), general-purpose machining parts, bushes, fasteners, agricultural machinery components, low-medium strength structural parts.

2. Overview / Application Summary

SAE 1020 is a low-carbon, wrought steel grade widely used where moderate strength, good weldability and good machinability are required. It is often supplied in hot-rolled or cold-finished conditions and is commonly used either in the supplied state or after secondary processing (e.g., case carburizing, heat treatment, machining). Womic Steel supplies 1020 bars with consistent quality control and can provide additional services such as machining, straightening, case hardening and precision grinding.

3.Typical Chemical Composition (wt.%)

4.Typical Mechanical Properties

Mechanical properties vary with manufacturing condition (hot-rolled, normalized, annealed, cold-drawn). The ranges below are typical industry values; use MTC for guaranteed contract values.

Hot-rolled / Normalized:
- Tensile strength (UTS): ≈ 350 – 450 MPa
- Yield strength: ≈ 250 – 350 MPa
- Elongation: ≥ 20 – 30%
- Hardness: 120 – 170 HB

Cold-Drawn:
- Tensile strength (UTS): ≈ 420 – 620 MPa
- Yield strength: ≈ 330 – 450 MPa
- Elongation: ≈ 10 – 20%
- Hardness: higher than hot-rolled

5. Physical Properties

Density: ≈ 7.85 g/cm³

Modulus of Elasticity (E): ≈ 210 GPa

Poisson’s ratio: ≈ 0.27 – 0.30

Thermal conductivity and expansion: typical for low-carbon steels (consult engineering tables for design calculations)

6.Heat Treatment & Workability

Annealing: heat above transformation range, slow cool.
Normalizing: refine grain structure, improve toughness.
Quenching & Tempering: limited through-hardening; case hardening recommended.
Carburizing: common for SAE 1020 for hard surface / tough core.
Cold Working: increases strength, reduces ductility.

7. Weldability & Fabrication

Weldability: Good. Typical processes: SMAW, GMAW (MIG), GTAW (TIG), FCAW. Preheat generally not required for common thicknesses; follow welding procedure specifications (WPS) for critical structures.

Brazing / Soldering: standard practices apply.

Machinability: Good — 1020 machines easily; cold-drawn bars machine differently from annealed bars (tools and parameters adjusted).

Forming / Bending: Good ductility in annealed state; bending radius limits depend on thickness and condition.

8. Standard Forms, Sizes & Tolerances

Womic Steel supplies bars in common commercial sizes. Custom sizes available on request.

Typical supply forms:

Round bars: Ø6 mm to Ø200 mm (diameter ranges depend on mill capability)

Square bars: 6 × 6 mm up to 150 × 150 mm

Flat / rectangular bars: thickness and width to order

Cut-to-length, sawn, or hot-cut ends; centerless ground and turned finished bars available.

Tolerances & surface finish:

Tolerances follow customer spec or applicable standards (ASTM A29/A108 or equivalent for cold-finished shafts). Womic Steel can supply precision ground (h9/h8) or turned to requirement.

9. Inspection & Testing

Womic Steel carries out or can provide the following inspection and test documentation:

Standard tests (included unless otherwise specified):

Chemical analysis (spectrometric / wet chemistry) and MTC showing actual composition.

Tensile test (as per agreed sampling plan) — report values for UTS, YS, Elongation.

Visual inspection and dimensional verification (diameter, straightness, length).

Hardness test (selected samples).

Optional :

Ultrasonic Testing (UT) for internal defects (100% or sampling).

Magnetic Particle Testing (MT) for surface cracks.

Eddy-current test for surface/near-surface defects.

Non-standard sampling frequency and third-party inspection (by Lloyd’s, ABS, DNV, SGS, Bureau Veritas, etc.).

Full MTC and certificate types on request (e.g., ISO 10474 / EN 10204 style certificates where applicable).

10. Surface Protection, Packing & Logistics

Surface protection: light rust-preventive oil coating (standard), plastic end caps for rounds (optional), additional rust-inhibitor packing for long sea voyages.
Packing: bundled with steel straps, wood dunnage for export; wooden crates for precision ground bars if required.
Identification / marking: each bundle / bar marked with heat number, grade, size, Womic Steel name, and PO number as requested.

11. Quality Systems & Certification

Womic Steel operates under a documented quality management system (ISO 9001).

MTC available for each heat/batch.

Third-party inspection and classification-society approvals can be arranged per contract.

12. Typical Uses / Applications

General engineering: shafts, pins, studs and bolts (before heat treatment or surface hardening)

Automotive components for non-critical applications or as core material for carburized parts

Agricultural machinery parts, couplings, machine parts and fixtures

Fabrication requiring good weldability and moderate strength

13. Womic Steel Advantages & Services

Mill capability for hot-rolled and cold-finished bars with tight dimensional control.

In-house quality lab for chemical & mechanical testing; MTC issued for each heat.

Additional services: precision grinding, centerless grinding, machining, case carburizing (via partner furnaces), and specialist packing for export.

Competitive lead times and global logistics support.

We pride ourselves on our customization services, fast production cycles, and global delivery network, ensuring your specific needs are met with precision and excellence.

Website: www.womicsteel.com

Email: sales@womicsteel.com

Tel/WhatsApp/WeChat: Victor: +86-15575100681 or Jack: +86-18390957568