Alloy E-4340 (4340) is available in Bar, Square, Round, Hexagon, Flat, Plates, Forging Stock and Welding Wire. For all stock availability of contact Sales.
| Grade | US Aerospace/Military | US Commercial | Other |
| 4340 E4340 |
AMS 6359 Sheet / strip / plate AMS 6409 Bars / Forgings N&T AMS 6414 Vac Melt Bars / Forgings AMS 6415 Bars / Forgings AMS 6484 Bars / Forgings N&T AMS-S-5000 MIL-S-8844 Cl1 |
ASTM A322 ASTM A331 AISI E4340 |
BMS-7-28 BPS-299-947-055 BPS-299-949-055 |
| Chemical Composition Limits | |||||||||||
| Weight% | C | Mn | P & S | Si | Cr | Ni | Mo | ||||
| E4340 Bar | 0.38 - 0.43 | 0.65 - 0.85 | 0.025 | 0.15-0.30 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | ||||
| E4340 Plate | 0.38-0.43 | 0.60-0.80 | 0.025 | 0.15-0.35 | 0.70-0.90 | 1.65-2.00 | 0.20-0.30 | ||||
Alloy E 4340 is a widely used deep-hardening constructional steel. Due to E-4340's high alloy content it obtains a uniformed hardness by heat treatment. The high fatigue strength makes E4340 ideal for highly stress parts as it maintains it's strength and hardness at elevated temperatures.
| Alloy | Condition | Tensile Strength ksi | Yield Strength ksi | Elongation 4D % | Reduction of Area % | Hardness HB |
| Alloy Steel E4340 Bar | Annealed | - | - | - | - | 235 max |
| Alloy Steel E4340 Bar | Hardened and Tempered | 260 | 217 | 10 | 30 | - |
Heat Treatment
To obtain the highest strength (260,000 psi minimum ultimate)
| E 4340 | |
| Normalised | 1650°F / 1 hr |
| Austenitise | 1500°F / 1 hr |
| Quench | Oil |
| Double Temper | 475°F / 2 hr twice |
Specifications
UNS G43406
AMS 6359 Sheet / strip / plate
AMS 6409 Bars / Forgings N&T
AMS 6414 Vac Melt Bars / Forgings
AMS 6415 Bars / Forgings
AMS 6484 Bars / Forgings N&T
AMS-S-5000
MIL-S-8844 Cl1
ASTM A322
ASTM A331
AISI E4340
BMS-7-28
BPS-299-947-055
BPS-299-949-055
Harsh Steel export AISI 4340 to below contries.
Harsh steel is a major stockist and Exporter of Harsh Steel AISI 4340 to many countries of the world such as Singapore, Brisbane, Sydney, Melbourne, Australia, Houston, TX, San Diego, San Francisco, Atlanta, USA, Brentford, United Kingdom, Phoenix, Ireland, New Zealand and Canada, Western Australia , Queensland, New South Wales, South Australia, Victoria, Australian Capital Territory, Tasmania, Northern Territory, Ontario, British Columbia, Yukon Territory, Alberta, Manitoba, Saskatchewan, New foundland, Prince Edward Island, New Brunswick, Nova Scotia, Eastern Cape, Gauteng, Kwazulu-Natal, Western Cape, England, Scotland, Wales, Northern Ireland, Lagos, Abuja Capital Territory, Vadodara, Mumbai, Chennai, New Delhi, Mahape, Gurgaon, Noida, Bangalore, Coimbatore, Cochin, Ash Sharqiyah, Ar Riyad, Makkah, Dhahran, Riyadh, Jiddah, Jeddah, Masqat, Kwazulu-Natal, Gauteng, Western Cape, Free State, Eastern Cape, Alberta, Saskatchewan, British Columbia, Newfoundland, New Brunswick, Manitoba, Ontario, Nova Scotia, Quebec, Calgary, Edmonton, Vancouver, Toronto, Birmingham, Brentford, Manchester, Bristol, Sheffield, Milton Keynes, London, Poplar, Edinburgh, Thames Ditton.