AISI 4330V Hot Forged Alloy Steel Hollow Bar

Model: AISI 4330V

Item specifics

Heat treatment: Quenching and Tempering

Surface: Bright or Black Surface

Application: Oil industry, Raise bore drill rods and drive subs

Standard: AMS 6427 AMS 6359 AMS6304 ASTM A646

Review

Description

AISI 4330V Steel

AISI 4330, is a fine-grained, medium carbon, chromium-nickel-molybdenum alloy steel. AISI 4330V is a modification of the 4330 alloy steel grade, with hardenability and other characteristics improved by the addition of vanadium. Alloy Steel 4330V offers good formability which is used for those that require a good combination of strength and impact resistance.

Relevant Standards

AMS 6427, AMS 6359, AMS 6304, ASTM A646, API 7 Specification 

Standard

ASTM A519 2003 Seamless Carbon and Alloy Steel Mechanical Tubing

Applications

Raise bore drill rods and drive subs, gears, aircraft landing gear, axles or shafts for power transmission.

Chemicals and Physical

C	Mn max	Si max	Cr	Mo	Ni	P max	S max	V
0.2-0.30	1.0%	0.80	0.40-0.60	0.30-0.50	1-1.5	0.025	0.010	0.05-0.10

Tensile strength: 130,000 psi

Yield strength:115,000 psi

Elongation at break (In 50 mm): ≥ 16.0 %

Hardness HBW: 321 - 375

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.

Annealing:Heat the steel slowly to 820-860°C and allow enough time for the steel to be thoroughly heated. Cool slowly in the furnace to 580°C followed by air cooling.

Stress Relieving of 4330V Steel

When parts are heavily machined, ground or otherwise subject to cold work, stress relieving will be beneficial prior to hardening.

Hardening of 4330V Steel

4330V steel is usually supplied ready heat treated to 35-39 HRc. If further heat treatment is required annealed 4330V should be heated slowly to 840-875°C and after adequate soaking at this temperature quench in oil. Temper as soon as the tools reach room temperature.

Tempering of 4330V Steel

Heat carefully to a suitable temperature selected by reference to a tempering chart or table, soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in air.