AISI 4340 Round Bar Exporter in India

AISI 4340 Round Bar — Overview

As a specialty alloy & carbon steel round bar exporter in India, JPS Metal & Alloys stocks AISI 4340 ex-Mumbai for both domestic supply and export via Nhava Sheva (JNPT). The nickel-chromium-molybdenum chemistry gives 4340 excellent hardenability in thick sections, where 4140 alone would not through-harden as reliably.

International Equivalents

Standard	Designation
DIN / W.Nr.	34CrNiMo6 / 1.6582
JIS	SNCM439
BS	EN24
ASTM / UNS	ASTM A29, UNS G43400

Chemical Composition

Element	Range
C	0.38–0.43%
Ni	1.65–2.00%
Cr	0.70–0.90%
Mo	0.20–0.30%

Mechanical Properties

Property	Value
Tensile Strength	1080–1240 MPa
Hardness	280–360 HB

Typical Applications

Aerospace structural partsHigh-stress shaftsLanding gear components

Frequently Asked Questions

Who is a reliable AISI 4340 round bar exporter in India?

JPS Metal & Alloys, based in Mumbai, is a stockist and exporter of AISI 4340 round bar manufactured to ASTM A29, UNS G43400. Every consignment ships with a full EN 10204 3.1 Mill Test Certificate and, on request, third-party inspection.

What is AISI 4340 round bar used for?

Typical applications include Aerospace structural parts, High-stress shafts, Landing gear components. The nickel-chromium-molybdenum chemistry gives 4340 excellent hardenability in thick sections, where 4140 alone would not through-harden as reliably.

What sizes of AISI 4340 round bar are available ex-stock?

We stock AISI 4340 in diameters from 10mm – 350mm dia, supplied annealed / q&t with black / peeled / ground surface finish, cut to your required length.

What certification comes with AISI 4340 round bar exports?

Every shipment includes an EN 10204 3.1 Mill Test Certificate verified against ASTM A29, UNS G43400, plus Certificate of Origin, packing list and commercial invoice for export consignments.