Chromoly Steel Tube

Product Description

Material OverviewChromoly steel tube short for chromium molybdenum steel tubing is a low alloy structural steel recognized for its strength to weight ratio toughness weldability and ease of fabrication The most widely specified grade for seamless tubing is AISI 4130 governed by standards such as ASTM A519 and MIL T 6736

Chemical Composition Mass Fraction PercentCarbon 0.28 to 0.33Chromium 0.80 to 1.10Molybdenum 0.15 to 0.25Manganese 0.40 to 0.60Silicon 0.15 to 0.35Phosphorus Max 0.035Sulfur Max 0.040Iron Balance

Mechanical Properties by ConditionCondition NormalizedTensile Strength Min 670 MPaYield Strength Min 435 MPaElongation Min 15 PercentHardness Approx 217 HB

Condition AnnealedTensile Strength Min 560 MPaYield Strength Min 460 MPaElongation Min 20 PercentHardness Max 197 HB

Condition Quenched and TemperedTensile Strength 900 to 1050 MPaYield Strength 750 to 900 MPaElongation Min 12 PercentHardness 28 to 34 HRC

Physical PropertiesDensity 7.85 grams per cubic centimeterModulus of Elasticity 205 GPaPoisson Ratio 0.29Thermal Conductivity 42.7 W per meter Kelvin at 100 degrees CSpecific Heat Capacity 477 J per kilogram Kelvin

Industry Standards and SpecificationsASTM A519MIL T 6736AMS 6360SAE J404 AISI 4130

Key ApplicationsAircraft fuselage structures and engine mountsMotorsport roll cages chassis frames and suspension armsHigh end bicycle frames and front forksHydraulic tubing and industrial fluid systemsOil and gas drilling equipment and downhole sleeves