Name: 42CrMo Cold Rolled Alloy Structural Steel Strip
Brand: Hengtaifeng

Overview

42CrMo is a chromium-molybdenum alloy structural steel (0.38-0.45% C, 0.90-1.20% Cr, 0.15-0.25% Mo) offering an exceptional combination of strength, toughness, and hardenability. Our 42CrMo steel strip serves demanding applications in gears, high-strength fasteners, and power transmission components where reliability under cyclic loading is critical.

Chemical Composition

Element	C	Si	Mn	Cr	Mo	P (max)	S (max)
%	0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.20	0.15-0.25	0.035	0.035

Mechanical Properties

Condition	Hardness	Tensile Strength
Annealed	≤217 HB	≤780 MPa
Hardened & Tempered	28-34 HRC	1000-1200 MPa
Quenched (oil)	50-55 HRC	1800-2100 MPa

Composition, hardness and mechanical-property tables are grade references, not guaranteed supply values. Verify the applicable standard edition, product form, condition and order-specific acceptance criteria.

Specification Review

Parameter	Range
Thickness	State the required value and tolerance; confirm grade-specific feasibility
Width	State the required value, tolerance and edge condition
Delivery Condition	Annealed / Hardened & Tempered / Quenched
Edge	Slit / Round / Square
Standard	GB/T 3077, JIS G4105, ASTM A29, EN 10083-3

Cross-Reference (Equivalent Grades)

GB	JIS	ASTM/AISI	EN/DIN
42CrMo	SCM440	4140	42CrMo4 / 1.7225

Typical Applications

Gears

Transmission gears, ring gears, and pinions. Excellent core toughness with surface hardness for wear resistance in high-load drivetrain applications.

High-Strength Bolts

Grade 10.9 and 12.9 fasteners, studs, and connecting rod bolts. Uniform hardenability ensures consistent strength across the full cross-section.

Crankshafts & Shafts

Crankshaft, connecting-rod and transmission applications require an agreed combination of grade, heat treatment, toughness and fatigue validation.

How to Specify 42CrMo Strip

State 42CrMo or the accepted equivalent standard
Provide thickness, width and dimensional tolerance
Choose the required delivery condition and surface finish
Describe the component, edge and testing requirements
Include order quantity and destination for quotation review

Technical Resources

Review the steel strip heat-treatment guide, compare automotive stamping applications, or browse the complete steel strip range.

Need 42CrMo in a specific thickness or condition?
Send your grade, dimensions, condition, quantity and destination. We will review feasibility and prepare a formal quotation after confirming the order requirements.

Request 42CrMo Quote

42CrMo Steel Strip