Alloy Steel Round Bar 4140
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Alloy Steel Round Bar 4140

Introduction The 4140 alloy steel round bar is a highly practical and versatile material that offers exceptional strength and resilience. With impressive tensile strength, high resistance to fatigue, and excellent abrasion and impact resistance, few materials can match the superior performance...

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Description

Technical Parameters

Introduction

The 4140 alloy steel round bar is a highly practical and versatile material that offers exceptional strength and resilience. With impressive tensile strength, high resistance to fatigue, and excellent abrasion and impact resistance, few materials can match the superior performance of this grade of steel. Its adaptability and practicality make it a popular choice for a wide range of applications, from manufacturing and construction to automotive and aerospace engineering. Whether you need a material that can withstand heavy use and extreme conditions or one that offers exceptional durability and longevity, 4140 alloy steel is an excellent choice.

Chemical Component

C	Cr	Mn	Si	Mo	S	P	Fe
0.38-.43%	0.80-1.10%	0.75-1.0%	0.15-0.30%	0.15-0.25%	0.040% max	0.035% max	Balance

Mechanical Property

Properties	Metric	Imperial
Tensile strength	655 MPa	95000 psi
Yield strength	415 MPa	60200 psi
Bulk modulus (typical for steel)	140 GPa	20300 ksi
Shear modulus (typical for steel)	80 GPa	11600 ksi
Elastic modulus	190-210 GPa	27557-30458 ksi
Poisson's ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	25.70%	25.70%
Hardness, Brinell	197	197
Hardness, Knoop (converted from Brinell hardness)	219	219
The Rockwell B hardness, which is converted from the Brinell hardness, measures the hardness of a material.	92	92
The following content is given for comparison purposes only: Rockwell C hardness, converted from Brinell hardness, is lower than the normal HRC range. This information is provided to facilitate accurate comparisons.	13	13
Vickers hardness, which is converted from Brinell hardness, determines the resistance of a material to indentation. It is a measure of the material's ability to withstand external forces without permanent deformation.	207	207
The machinability of a material can be measured using a scale that compares it to the machinability of AISI 1212, which is rated as 100. This rating system allows engineers and machinists to choose the best materials for their projects based on how easy they are to machine. By comparing the machinability of different materials to the benchmark of AISI 1212, manufacturers can achieve better productivity and reduce costs by selecting the optimal material for their operations. Additionally, by understanding how different materials perform during machining processes, engineers can adjust tooling, cutting speeds, and feeds to optimize the performance of the machinery and the quality of the machined parts.	65	65

Details

Product Name	Alloy Steel Round Bar 4140
Standard	AISI,ASTM, EN, BS, GB, DIN, JIS
Diameter	10mm-1200mm
Technology	Hot rolled, Cold rolled, Forged
Surface	Polished bright, black
Inspection	ISO,BV,SGS,MTC
Supply Ability	1000 metric tons/month
Shipment time	Within 7-10 workdays after receiving deposit .
Payments	T/T, LC