ASTM A519 4130 low alloy steel tubing

AISI 4130 is a low alloy steel containing molybdenum and chromium as strengthening agents. The carbon content is nominally 0.30% and with this relatively low carbon content the alloy is excellent from the fusion weldability standpoint. The ASTM A519 4130 alloy can be hardened by heat treatment.
Sunny Steel offers an extensive range of ASTM A519 4130 seamless mechanical tubing is manufactured to meet your specific application requirements. Controlled modifications and adjustments are made to the tube making process for each order and take into consideration end use and all finishing operations (including heat treatment) that will be performed after you have received the tubing.

ASTM A519 4130 tubing products representative will be happy to work with you to develop the information that is required.

Grade and Chemical Composition (%)
Carbon 0.28-0.33
Manganese 0.40-0.60
Phosphorus,max 0.04
Sulfur, max 0.04
Silicon 0.15-0.35
Chromium 0.80-1.10
Molybdenum 0.15-0.25
Typical Mechanical Properties
Condition Ultimate Strength Yield Strength Elongation in 2 in.or 50mm,% Rockwell,Hardness B Scale
ksi Mpa ksi Mpa
HR 90 621 70 483 20 89
SR 105 724 85 586 10 95
A 75 517 55 379 30 81
N 90 621 60 414 20 89
Cold Working Cold working by conventional methods is readily accomplished on this alloy.
Annealing 4130 (and most of the other low alloy steels) may be Annealed at 1550 F for a time long enough to allow thorough heating of the section size. It should then be cooled in the furnace at a rate of less than 50 F per hour down to 900 F, followed by air cooling from 900 F.
Aging Not applicable to this alloy.
Tempering Tempering is done to restore some of the ductility that may be lost after the hardening heat treatment and quench. Alloy 4130 is tempered at between 750 F and 1050 F, depending upon the strength level desired. The lower the tempering temperature the greater the strength.
Other Comments The 4130 alloy is a through hardening alloy and should not be case hardened.
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