Metals

Alloy Steel 4130 in Bar & Hollow Bored Bar

Typically used in oil and gas applications, Castle Metals stock Alloy 4130 in hollow bored bar and round bar, with custom heat treating, cutting, boring and honing available.

Alloy 4130 is very popular for welding applications and is often used in the normalized condition without further heat treatment. It can be nitrided to enhance its wear quality. Its popularity is primarily due to its weldability, hardenability, and machinability. Alloy 4130 contains similar properties as Alloy 8630. Alloy 4130 is stocked in normalized, quenched, and tempered condition.

Chemistry (range or maximum in %)

GRADE SHAPE C Mn P Max S Si Ni Cr Mo Other
E4130 AIRCRAFT QUALITY Bar .28/.33 .40/.60 0.025 0.025 .15/.35 - .80/1.10 .15/.25 -
4130 Plate .27/.34 .35/.60 0.035 0.04 .15/.40 - .80/1.15 .15/.25 -
4130 PREHARD .27/.33 .90/1.30 0.035 0.04 .15/.40 - .60/.90 .15/.25 V - .02
4130 AQ CONDITION N .28/.33 .40/.60 0.025 0.025 .20/.35 0.25 .80/1.10 .15/.25 -

Grade 4130 Bars: Annealed / Normalized & Tempered Properties

GRADE SHAPE SIZE RANGE CONDITION OF STEEL SPECIFICATION Brinell Hardness (BHN) Max RELATIVE MACHINABILITY
BASED ON AISI 1212 AS 100%
E4130 AIRCRAFT QUALITY Rounds 3/8" - 4" Cold Finished & Normalized AMS 6370 / 2301 241 75%
3/4" - 10" Hot Rolled M.S. & Normalized 229
3/8" - 1-1/2" Cold Finished & Heat Treated 321 45%
Hexagons 3/8" - 2" Cold Finished & Annealed 241 72%
3/8" - 1-1/2" Cold Finished & Heat Treated 321 45%
Squares 1/2" - 1-1/2" Cold Finished & Normalized 241 75%
1/4" - 1-1/2" Cold Finished & Heat Treated 321 45%
Flats 3/16" x 1-1/2" Min 4" x 6" Max Cold Finished & Normalized 241 75%
1-1/2" x 5" Min 4" x 6" Max Hot Rolled & Normalized 229
3/4" x 1" Min 1-1/2" x 3" Max Cold Finished & Heat Treated 321 45%

Grade 4130 Tube Properties

GRADE Shape Specification Tensile-ksi Yield-ksi Elongation %
4130 Tube ASTM A-513 Type 5 (DOM) 90 80 10
ASTM A-519 (CDS) 90 80 10
 

Alloy 4130 Tube is an alloy with an excellent combination of strength, hardness and toughness in both welded and seamless.