Products Description

Product Specifications

Standards	GB/T 3077
Steel Grades	35CrMo, 40CrMo, 42CrMo
Equivalent Standards	ASTM A335, DIN 17240, JIS G4105
Outer Diameter (OD)	5mm-420mm
Wall Thickness (WT)	0.5mm-55mm
Length	Up to 12 meters, or customized
Surface Treatment	Polished
Production Process	Cold-drawn
Condition	Quenched and Tempered

42CrMo alloy structural steel possesses a higher carbon content than 35CrMo alloy structural steel; consequently, it exhibits superior strength and enhanced hardenability. Furthermore, following the quenching process, the microstructure of 42CrMo alloy structural steel is more refined than that of 35CrMo alloy structural steel, and it is less susceptible to overheating during heating compared to 35CrMo alloy structural steel.

The respective operating temperature ranges for 35CrMo, 40CrMo, and 42CrMo alloy pipes are -20°C to 480°C, -20°C to 520°C, and -20°C to 550°C. These pipes are supplied in a Quenched and Tempered (Q&T) condition, a treatment that significantly enhances their mechanical strength, toughness, and fatigue resistance.

Customized Services

TORICH offers custom sizing services for non-standard dimensions, featuring an outer diameter tolerance of ±0.05 mm and a wall thickness tolerance of ±5%. We provide precision cutting services to any specified length within the range of 300 mm to 12,000 mm.
We offer a comprehensive range of surface treatments-including pickling and passivation, sandblasting/shot blasting, precision grinding, and mirror polishing-as well as corrosion-resistant coatings such as black phosphating, chrome-free electro-galvanizing, and hot-dip galvanizing.
Additionally, we provide tube bending services, allowing for the customization of any bending radius, alongside various cold-forming processes for tube ends-including flaring, swaging, flanging, and tapering.

Chemical Composition

Element (%)	Carbon	Manganese	Silicon	Phosphorus	Sulfur	Chromium	Molybdenum
35CrMo	0.32–0.40	0.40–0.70	0.17–0.37	≤0.035	≤0.035	0.80–1.10	0.15–0.25
40CrMo	0.38–0.45	0.40–0.70	0.17–0.37	≤0.035	≤0.035	0.90–1.20	0.15–0.25
42CrMo	0.38–0.45	0.50–0.80	0.17–0.37	≤0.035	≤0.035	0.90–1.20	0.15–0.25

Mechanical Properties

Property	Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Energy (J)
35CrMo	Q&T	930–1080	≥ 785	≥ 12	≥ 39
40CrMo	Q&T	930–1080	≥ 785	≥ 12	≥ 39
42CrMo	Q&T	980–1180	≥ 835	≥ 12	≥ 39

Possible Alternative Grades

SAE 4135: Commonly used in North America, it offers the same combination of tensile strength, yield strength, and hardenability after quenching and tempering.
JIS SCM435: The SCM series of steels has a very similar alloy composition and excellent hardenability. They are commonly used in Asia for gears, shafts, and highly stressed mechanical parts.
DIN 41CrMo4: Widely used in Europe in the automotive, machinery, and energy sectors. They offer consistent quality and meet the EN 10083 standard for heat-treatable steels.

application areas

35CrMo alloy is used to manufacture critical components in various types of machinery that are subjected to impact, bending, torsion, and heavy loads-such as herringbone gears in rolling mills, crankshafts, hammer rods, connecting rods, and fasteners.
40CrMo is frequently utilized in the production of transmission components for large vehicles, such as heavy-duty trucks and construction machinery; examples include gearbox gear shafts and universal joints.
42CrMo is employed for critical safety-related components that require high load-bearing capacity, high impact resistance, and extended fatigue life-specifically, vital load-bearing parts such as large transmission shafts, crankshafts, and hydraulic components.

Products Show

Testing Equipment

Eddy Current Flaw Detector

Hydraulic Universal Testing Machine

Intergranular Corrosion Tester

Factory Equipment

Pickling equipment

Polishing equipment

Cold drawing equipment

Products Package

We offer a wide range of packaging options, including plastic end caps, woven bags, wooden crates, and iron frames. Custom packaging solutions, logo branding, and other personalized requirements are also available to meet specific customer needs.