En 1.0503 Material C45 Steel Carbon Constructional Quality Steel Plate/Steel Round/Steel Flats/Steel Forging

• Type: Carbon Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Stainless Steel Scrap
• Technique: Forged
• Shape: Bar
• Surface Treatment: Polished
• Model NO.: carbon steel
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Die Steel Bar
• Transport Package: N/M
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7228400000
• Production Capacity: 5000ton/Month

Product Description

Product Description

EN 1.0503 Material C45 Steel Equivalent, Properties, Composition

EN 1.0503 Material C45 Steel

EN 10083-2 C45 steel (EN 1.0503) is a high strength medium carbon quality steel. Due to poor hardenability, C45 material is generally used in a normalized condition, and when the mechanical properties are required to be high, the quenching and tempering treatment is adopted. The cold deformation plasticity is medium, and the machinability of annealing and normalizing is better than that of quenching and tempering.

C45 Steel Properties and Specifications

The table below gives the C45 steel properties and specifications including chemical composition, mechanical properties and heat treatment.

Chemical Composition

Datasheet 1, The following data sheet lists the C45 chemical composition based on casting analysis.

		Chemical Composition, %
Standard	Steel name (Steel number)	C	Si, ≤	Mn	P, ≤	S, ≤	Cr, ≤	Ni, ≤	Mo, ≤	Cr+Mo+Ni, ≤
EN 10083-2	C45 (1.0503)	0.42-0.50	0.40	0.50-0.80	0.045	0.045	0.40	0.40	0.10	0.63

Mechanical Properties

The following table gives the C45 steel mechanical properties such as tensile strength, yield strength and hardness in the quenched and tempered, and normalized conditions.
Yield Strength
Datasheet 2, Yield strength in different diameter and conditions.

	Yield strength (MPa)
Steel (Steel number)	MPa, ≥	Diameter (d), Thickness (t) in mm	Conditions
C45 (1.0503)	490	d ≤ 16 t ≤ 8	Quenched and tempered (for the ruling section)
	430	16 < d ≤ 40 8 < t ≤ 20
	370	40 < d ≤ 100 20 < t ≤ 60
	340	d, t ≤ 16	Normalized (for products)
	305	16 <d, t ≤ 100
	275	100 <d, t ≤ 250

Tensile strength
Datasheet 3, Tensile strength in different diameter and conditions.

	Tensile strength (MPa)
Steel (Steel number)	Mpa	Diameter (d), Thickness (t) in mm	Conditions
C45 (1.0503)	700-850	d ≤ 16 t ≤ 8	Quenched and tempered (for the ruling section)
	650- 800	16 < d ≤ 40 8 < t ≤ 20
	630-780	40 < d ≤ 100 20 < t ≤ 60
	≥ 620	d, t ≤ 16	Normalized (for products)
	≥ 580	16 <d, t ≤ 100
	≥ 560	100 <d, t ≤ 250

Elongation
Datasheet 4, Minimum percentage elongation after fracture.

	Elongation
Steel (Steel number)	≥, %	Diameter (d), Thickness (t) in mm	Conditions
C45 (1.0503)	14	d ≤ 16 t ≤ 8	Quenched and tempered (for the ruling section)
	16	16 < d ≤ 40 8 < t ≤ 20
	17	40 < d ≤ 100 20 < t ≤ 60
	14	d, t ≤ 16	Normalized (for products)
	16	16 <d, t ≤ 100
	16	100 <d, t ≤ 250

Reduction
Datasheet 5, Minimum percentage reduction in cross section on fracture in the quenched and tempered condition.

	Reduction in cross section (≥, %); Diameter (d), Thickness (t) in mm
Steel (Steel number)	d ≤ 16 t ≤ 8	16 < d ≤ 40 8 < t ≤ 20	40 < d ≤ 100 20 < t ≤ 60
C45 (1.0503)	35	40	45

Hardness
Datasheet 6, Products in the "treated to improve shearability" or "soft annealed" condition

		Hardness in different conditions
Standard	Steel name (Steel number)	(HBW)	Condition
EN 10083-2	C45 (1.0503)	255	Treated to improve shearability
		207	soft annealed

Welding

Since material 1.0503 has a medium carbon content, it needs to preheat before welding, and the C45 material preheating temperature is 150 to 250 °C.
After welding, it's better subjected to stress relief immediately, especially for large thickness weldments, the tempering temperature for stress relief is 550-660 °C.

Heat Treatment for Guidance

The heat treatment for C45 steel is mainly include quenching, tempering, normalizing and austenitizing, etc.

Quenching

The quenching temperature is 820-860 ºC, quenching agent is water (temperatures at the lower end of the range) or oil (upper end of temperatures). Guidance for austenitizing period is at least 30 min.

Tempering

The guidance for tempering temperature is 550-660 ºC, tempering period is at least 60 min.

Normalizing

The guidance for normalizing temperature is 840-900 ºC.

Isothermal Transformation Diagram

The image below shows C45 steel Isothermal Transformation Diagram (also known as Time Temperature Transformation, TTT) for reference.

Application

Material C45 (1.0503) is used to manufacture parts with high strength requirements, such as gears, shafts, piston pins, etc., and parts that are not very stressed, such as machined parts, forgings, stampings, bolts, nuts, and pipe joints.

C45 Material Equivalent Steel Grades

Datasheet 7, European standard (including Germany DIN, British BSI, French NF and other EU member state standards) C45 steel equivalent to Chinese GB standards, US ASTM AISI and SAE, Japanese JIS standards and ISO standards, etc.

C45 steel equivalent material
European Union		Chinese		US		Japanese		ISO
Standard	Grade (Steel number)	Standard	Grade	Standard	Grade	Standard	Grade	Standard	Grade
EN 10083-2	C45 (1.0503)	GB/T 699	45 steel	AISI SAE, ASTM A29/A29M	1045 steel	JIS G4051	S45C		C45E4

 

Detailed Photos