38CrMoAl steel

38CrMoAl steel
38crmoal is a high-grade nitrided steel with high wear resistance, high fatigue strength and high strength characteristics. Mainly used for nitrided parts with precise dimensions after heat treatment, or various nitrided parts with low impact load and high wear resistance, such as boring bars, grinding machine spindles, automatic lathe spindles, worms, precision screw rods, precision gears, High-pressure valves, valve stems, gauges, templates, rollers, imitations, cylinder blocks, compressor piston rods, governors, rotating sleeves, fixed sleeves on steam turbines, various wear parts on rubber and plastic extruders, etc. .
 


 
Name: 38CrMoAl Steel
Standard: GB/T3077-2018
Round steel density: 0.00785g/mm^3
Properties: high wear resistance
Main uses: boring bar, grinding machine spindle, automatic lathe spindle, etc.
 
Standard: alloy steel pipe GB/T3077-2015, steel plate GB/T11251-2018.
 

Features and scope of application:
38CrMoAl has high surface hardness, wear resistance and fatigue strength, good heat resistance and corrosion resistance, and low hardenability. Used to produce nitrided parts with high wear resistance, high fatigue strength, considerable strength, and high dimensional accuracy after treatment, such as imitation molds, cylinder liners, gears, high-pressure valves, boring rods, worms, grinding machine spindles, etc. However, larger parts should not be used.
 
 
Chemical composition

Grade	Chemical composition(%)
	C	Si	Mn	S	P	Cr	Al	Ni	Cu	Mo
38CrMoAl	0.35～0.42	0.20～0.45	0.30～0.60	≤0.035	≤0.035	1.35～1.65	0.70～1.10	≤0.30	≤0.30	0.15～0.25

 
 
Physical properties

Grade	Physical properties
	Tensile strength (MPa)	Yield strength MPa)	Elongation (%)	rate of reduction in area (%)	Impact energy (J)	Impact toughness value (J/cm2)	Hardness(HB)
38CrMoAl	≥980	≥835	≥14	≥50	≥71	≥88	≤229

 Note:
Sample size: sample blank size is 30mm
 
 
Heat treatment specification
● Heat treatment specification and metallographic structure:
Heat treatment specification: quenching 940℃, water cooling, oil cooling; tempering 640℃, water cooling, oil cooling.
●Delivery status: delivery in (normalizing, annealing or high temperature tempering) or without heat treatment, the delivery status should be indicated in the contract.
● Annealing No.1 "760±10℃ annealing, furnace cooling to 400℃ air cooling.
 
 
Equivalent grade

GB/T3077	ISO	JIS	DIN	BS	NF
38CrMoAl	41CrAlMo74	SACM645	41CrAlMo7 34CrAlMo5	905M39 905M31	40CAD6.12 30CAD6.12

 
 

38CrMoAl round steel bar specification

Grade	Specifications Length (MM)	Weight	Alloy Steel	Product Name
38CrMoAl	3.0-25	50t	Alloy Steel	Bright Round Bar
38CrMoAl	12-50	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф100-130	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф140-150	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф160-170	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф16-40	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф200-280	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф50-70	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф50-90	50t	Alloy Steel	Hot Rolled Round Steel
38CrMoAl	ф50-95	50t	Alloy Steel	Hot Rolled Round Steel
Material	Specifications Length (Mm)	Fixed Rolling	Alloy Steel	Product Name
38CrMoAl	8-10	50t	Alloy Steel	Hot Rolled Steel Sheet
38CrMoAl	12-16	50t	Alloy Steel	Hot Rolled Steel Sheet
38CrMoAl	18-20	50t	Alloy Steel	Hot Rolled Steel Sheet
38CrMoAl	22-28	50t	Alloy Steel	Hot Rolled Steel Sheet
38CrMoAl	30-34	50t	Alloy Steel	Hot Rolled Steel Sheet
38CrMoAl	80-100	50t	Alloy Steel	Forged Steel Plate
38CrMoAl	160	Fixed Rolling	Alloy Steel	Forged Steel Plate
38CrMoAl	170	Fixed Rolling	Alloy Steel	Forged Steel Plate
38CrMoAl	180	Fixed Rolling	Alloy Steel	Forged Steel Plate