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SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
Specifications
Brand Name :
TSINGSHAN
Model Number :
4340
Certification :
ISO MTC
Place of Origin :
China
MOQ :
100KGS
Price :
USD1.45/KG
Payment Terms :
L/C, T/T
Supply Ability :
50000KGS
Delivery Time :
7 Days
Packaging Details :
Wooden Box
Alloy Or Not :
YES
Size Range :
10-800MM
Size :
10-800MM
Hardness :
Customizable
Technique :
Hot Rolled/Cold Drawn/Forged
Length :
Customizable
Products Name :
Alloy Steel Round Bar
Condition :
Stock
Shape :
Round
Service :
Cutting
Hs Code :
7312000
Steel Grade :
4340
Loading Port :
Shanghai Port
Description

SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered

SAE AISI 4340 Steel (UNS G43400)

AISI 4340 steel (UNS G43400) is an ultra-high strength medium carbon low alloy steel, which combines deep hardenability, high ductility, toughness and strength, and has high fatigue resistance and creep resistance. It is not particularly affected by tempering and embrittlement, and exhibits good strength retention at high temperatures and is not easily softened. In thin sections, this steel is air-hardened. In practice, it is usually oil quenched.

4340 Alloy Steel Datasheet

The following tables and lists give 4340 alloy steel datasheet and specification including chemical composition, physical properties and mechanical properties, heat treatment, welding, etc.

Chemical Composition

AISI 4340 steel material chemical composition is listed in the following table based on cast analysis.

4340 Chemical Composition, %
ASTM Steel Grade (UNS) C Si Mn P (≤) S (≤) Ni Cr Mo Notes
ASTM A29/A29M 4340 alloy steel (UNS G43400) 0.38-0.43 0.15-0.35 0.60-0.80 0.035 0.04 1.65-2.00 0.70-0.90 0.20-0.30 Steel Bars, Carbon and Alloy, Hot-Wrought
ASTM A322 Steel Bars, Alloy, Standard Grades
ASTM A519/A519M Seamless Carbon and Alloy Steel Mechanical Tubing
ASTM A646/A646M Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings

The tables below list AISI 4340 steel properties, including physical and mechanical properties.

Physical Properties

4340 alloy steel physical properties are given in the following lists, including density, thermal expansion, elastic modulus, thermal conductivity, specific heat capacity and electrical resistance.

Notes:

  • 10-6·K-1 = 10-6/K
  • 1 Ω·mm²/m = 1 μΩ·m
  • 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
  • 1 GPa = 1 kN/mm2
  • 1 MPa = 1 N/mm2
Physical Properties
Density, g/cm3 (lb/in.3) 7.85 (0.284) Conditions
Melting point, °C (°F) 1505 (2740) –
Specific heat capacity, J/kg·K (Btu/lb ·°F) 475 (0.114) at 20℃ –
Modulus of Elasticity, GPa (ksi) 205 (29700) –
Bulk Modulus, GPa (ksi) 140 (20300) –
Poisson’s Ratio 0.29 –
Shear Modulus, GPa (ksi) 80 (11600) –
Thermal conductivity, W/m·K (Btu/ft · h ·°F) 44.5 (25.73) –
Coefficient of thermal expansion, 10-6/K (μin./in. ·°F) 12.3 at 20-100 ℃ (68-212 °F) Oil hardened, tempered 600 °C (1110 °F)
12.7 at 20-200 ℃ (68-392 °F)
13.7 at 20-400 ℃ (68-752 °F)
14.5 at 20-600 ℃ (68-1112 °F)
11.2 at -100 to 20 °C (-148 to 68 °F) Oil hardened, tempered 630 °C (1170 °F)
10.4 from -150 to 20 °C (-238 to 68 °F).
12.4 at 20-200 ℃ (68-392 °F)
13.6 at 20-400 ℃ (68-752 °F)
14.3 at 20-600 ℃ (68-1112 °F)

Mechanical Properties

4340 steel mechanical properties are listed in the following tables.

AISI 4340 Mechanical Properties
Steel Condition Tensile strength, MPa (ksi), ≥ Yield strength, MPa (ksi), ≥ Elongation in 50 mm (2 in.), ≥ Reduction in area, %, ≥ Hardness, HB, ≤
4340 Normalized at 870 °C (1600 °F) 1282 (186) 862 (125) 12.2 36.3 363
Annealed at 810 °C (1490 °F) 745 (108) 470 (68) 22.0 50.0 217
Oil quenched from 800 °C (1475 °F) and tempered at 540 °C (1000 °F) 1207 (175) 1145 (166) 14.2 45.9 352

SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and TemperedSAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and TemperedSAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered

APPLICATIONS

Typical applications for this grade include:

  • Axle shafts
  • Heavy duty shafting
  • Mine drilling parts

REQUIREMENTS

Company can meet the following specifications for this grade:

  • ASTM A29
  • ASTM A322

SHAPES AND SIZES

supplies 4340 steel bar in a variety of sizes ranging from 1/2”-15”. The shapes available for this grade include:

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SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered

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Product Detail
Brand Name :
TSINGSHAN
Model Number :
4340
Certification :
ISO MTC
Place of Origin :
China
MOQ :
100KGS
Price :
USD1.45/KG
Contact Supplier
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered
SAE 4340 Alloy Steel Round Bar Dia 300mm Length 3000mm DIN 1013 Oil Quenched and Tempered

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
11 Years
jiangsu, wuxi
Since 1998
Business Type :
Manufacturer, Distributor/Wholesaler, Agent, Exporter, Seller
Main Products :
Stainless Steel Sheet, Stainless Steel Plates, Stainless Steel Coils
Total Annual :
80Millen-100 Millen
Employee Number :
200~500
Certification Level :
Verified Supplier
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