20# Hot Rolled Carbon Steel Round Bar, Equivalent AISI 1020 Solid Carbon Steel Round Rod

Low carbon content with excellent ductility and toughness
Great weldability and bending performance for fabrication
AISI 1020 equivalent grade, widely accepted globally
Easy for stamping, forging and rough machining
Stable material property, suitable for surface carburizing treatment

Product Overview

20# hot rolled carbon steel round bar is a low carbon hot rolled solid steel rod, equivalent international grade AISI 1020. It is manufactured strictly under GB/T 702, ASTM A675, EN 10060 standards. This grade features outstanding ductility, good weldability and easy forging performance. The surface is black finish with mill scale from hot rolling process. It is widely used for machinery structural parts, forging blanks, shaft blanks, fastener raw materials and carburized components. Custom cut lengths and official Mill Test Certificate can be provided for worldwide buyers.

Carbon Steel Round Bar

Chemical & Mechanical Property Snapshot

Item	20# (AISI 1020 Equivalent)
C (Carbon)	0.17%–0.23%
Si (Silicon)	0.17%–0.37%
Mn (Manganese)	0.35%–0.65%
P (Phosphorus)	≤0.035%
S (Sulfur)	≤0.035%
Yield Strength	≥245 MPa
Tensile Strength	410–550 MPa
Elongation	≥25%
Impact Test	Room temperature impact available

Detailed Technical Specifications

Specification Item	Details
Product Name	20# Hot Rolled Carbon Steel Round Bar
Equivalent Grade	AISI 1020
Production Standard	GB/T 702, ASTM A675, EN 10060
Diameter Range	Φ10 mm – Φ300 mm
Surface Condition	Black surface with mill scale
Tolerance	Standard hot-rolling industrial tolerance
Length	3m – 12m or customized cut length
MOQ	5 Ton
Lead Time	7–15 working days after deposit
Certification	MTC, Mill Test Certificate
Package	Bundled with steel strips, seaworthy packing

Size Specification Table

Type	Diameter Range	Common Available Diameters	Standard Length	Tolerance	Cutting Service
Hot Rolled Round Bar	Φ10 mm–Φ300 mm	Φ12, Φ14, Φ16, Φ18, Φ20, Φ25, Φ30, Φ40, Φ50, Φ60, Φ80, Φ100, Φ120, Φ150, Φ200, Φ250, Φ300	6 m / 12 m	Standard hot-rolling tolerance	Custom cut-to-length & zero-cut
Cold Drawn Bright Round Bar	Φ3 mm–Φ80 mm	Φ3, Φ4, Φ5, Φ6, Φ8, Φ10, Φ12, Φ14, Φ16, Φ20, Φ25, Φ30, Φ40, Φ50, Φ60, Φ70, Φ80	6 m / 12 m	±0.02–0.05 mm	Custom cut-to-length & zero-cut

Product Comparison Table

Comparison Item	Hot-Rolled 20# Carbon Steel Round Bar	Cold-Drawn Carbon Steel Round Bar
Surface Condition	Black surface with mill scale	Smooth, bright precision surface
Available Grades	20#	1018, 1045, 20#, 45#
Equivalent International Grade	20# ≈ AISI 1020	1018 ≈ Q235B; 1045 ≈ 45#; 20# ≈ 1020; 45# ≈ 1045
Manufacturing Standard	GB/T 702, ASTM A675, EN 10060	GB/T 905, ASTM A108, EN 10278
Diameter Range	Φ10 mm–Φ300 mm	Φ3 mm–Φ80 mm
Dimensional Tolerance	Standard hot-rolling industrial tolerance	Ultra-tight tolerance ±0.02–0.05 mm
Processing Characteristics	Suitable for rough machining, forging blanks, and structural fabrication	Suitable for precision machining and finished components; reduces secondary machining
Typical Applications	Forging blanks, shaft blanks, machinery structural parts, fastener raw stock, carburizing parts	Precision shafts, mechanical pins, turned & milled components, gear blanks
Recommended Selection	Select for large-diameter, ductile structural, forging & carburizing rough-machining projects	Select for high-precision requirements, less material removal, and tight dimensional control

App Market

Reliable Steel Coil Solutions For Diverse Industrial Applications

Mechanical Shaft Components

Gear Blanks

Agricultural Machinery Parts

Product Packaging

Secure Export Packaging For Safe Handling And Delivery

FAQs

What is the equivalent grade of 20# round bar?

20# hot rolled round bar is equivalent to AISI 1020. It can replace AISI 1020 for most low carbon structural and forging applications.

What are the main uses of 20# carbon steel round bar?

It is widely used for forging blanks, shaft blanks, fastener raw materials, carburized parts and general machinery structural components.

Can 20# steel be used for carburizing heat treatment?

Yes. 20# low carbon steel is a typical material for carburizing to get hard surface while maintaining tough core.

Can you cut 20# round bar to custom lengths?

Yes. We provide custom cutting service according to your drawing requirements.

What is the MOQ and lead time?

MOQ is 5 tons, lead time 7–15 working days after receiving deposit.

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20# Hot Rolled Carbon Steel Round Bar, Equivalent AISI 1020 Solid Carbon Steel Round Rod