Overview
About SAE 4340 Alloy Steel
C P Steel Suppliers supplies SAE 4340 Alloy Steel for engineering, industrial machinery and manufacturing applications. It is classified as Ultra-High Strength Nickel-Chromium-Molybdenum Alloy Steel. Available forms include ROUND BAR.
Contact our Mumbai team with your required size and quantity to confirm availability, documentation and delivery.
SAE 4340 Round Bar Suppliers, SAE 4340 Stockist, SAE 4340 Big Dia, SAE 4340 Cut to size as per requirement, SAE 4340 Flat Bar, SAE 4340 Small Quantity, SAE 4340 Larger Dia, SAE 4340 Circle, Ring. SAE 4340 Mumbai, Chennai, Tamil Nadu, Gujarat, Pune, Maharashtra, India etc.
Specification
Chemical Composition
ElementComposition (wt%)
CCarbon
0.38 - 0.43%
MnManganese
0.60 - 0.80%
SiSilicon
0.15 - 0.35%
NiNickel
1.65 - 2.00%
CrChromium
0.70 - 0.90%
MoMolybdenum
0.20 - 0.30%
PPhosphorus
max 0.035%
SSulfur
max 0.040%
FeIron
Balance
Performance
Mechanical, Physical & Processing Properties
PropertyValue / Reading
Tensile Strength930 - 1080 MPa (Q&T) / up to 1800 MPa (High Strength Q&T)
Yield Strengthmin 740 MPa
Elongation12 - 15 %
Hardness Brinell269 - 331 HBW
PropertyValue / Reading
Density7.85 g/cm³
Melting Point1427 °C
Modulus Of Elasticity205 GPa
Thermal Conductivity44.5 W/m·K
PropertyValue / Reading
WeldabilityRequires preheating and post-weld stress relief; avoid welding in hardened condition.
MachinabilityGood in annealed or spheroidized state (approx. 50% of AISI 1112).
Case HardeningExcellent deep hardenability; suitable for nitriding and surface induction hardening.
Corrosion ResistanceLow; requires protective finish.
Cross Reference
Equivalent Grades by Standard
Standard / RegionEquivalent Grade
Indian IS40Ni6Cr4Mo3 (IS 1570)
European EN34CrNiMo6 / 40NiCrMo6 (EN 10083-3)
Germany DIN40NiCrMo6 / 34CrNiMo6
Japan JISSNCM439 (JIS G4053)
UK (BS)817M40 / EN24 (BS 970)
USA (SAE / AISI)SAE 4340 / AISI 4340
Availability
Available Forms & Sizes
- ROUND BAR
Form TypeSize Range Available
Black Round BarsOD 16MM - OD 450MM
FAQ
SAE 4340 — frequently asked questions
What is the equivalent of SAE 4340?
Standards: Indian IS: 40Ni6Cr4Mo3 (IS 1570); European EN: 34CrNiMo6 / 40NiCrMo6 (EN 10083-3); Germany DIN: 40NiCrMo6 / 34CrNiMo6; Japan JIS: SNCM439 (JIS G4053); UK (BS): 817M40 / EN24 (BS 970); USA (SAE / AISI): SAE 4340 / AISI 4340.
Which forms of SAE 4340 are available?
SAE 4340 is available as ROUND BAR.
Where can I buy SAE 4340 Alloy Steel in Mumbai or across India?
C P Steel Suppliers supplies SAE 4340 Alloy Steel from Mumbai. Contact us with your size and quantity to confirm availability and delivery.
Interested in Alloy Steel SAE 4340?
Tell us the size and quantity you need and we will get back to you.