Stacked steel plates in a warehouse aisle beside yellow floor line

Alloy Steel Sheet

42CrMo4 SCM440 Alloy Structural Steel Plate

Name: 1.7225 Steel Plate
Brand: Tianyu Metal

One plate certified as 1.7225 42CrMo4 SCM440 38XM 42CrMo and 4140

1.7225 steel plate is an alloy structural steel that combines high strength and hardenability with good toughness and only minimal deformation during quenching. Design and methods engineers in mechanical engineering and the automobile industry specify it for high and moderately stressed components such as shafts, connecting rods, crankshafts and screws. The awkward part of buying it is that the same steel travels under 1.7225, 42CrMo4, SCM440, 42CrMo, 38XM and 4140 depending on whose drawing you are holding, which turns a routine order into a certificate cross check. Plate is stocked from 0-1000mm thickness, supplied annealed or quenched and tempered, and certified under the designation you order.

Request A Quote Ask For Specifications

Product Name — 4140 SCM440 42CrMo4 38XM 42CrMo 1.7225 steel
Grade — 4140 SCM440 42CrMo4 38XM 42CrMo 1.7225
Thickness — 0-1000mm
Size — Customized size
Technique — Annealed quenched and tempered

Why It Is Specified

Key Benefits of 1.7225 Steel Plate

Minimal Deformation During Quenching

The grade distorts little on quench, which keeps machining allowance down on long shafts and reduces straightening work after heat treatment.

Strength With Usable Toughness

High strength is combined with good toughness, so a component can carry a fatigue load without behaving like a brittle hardened part.

Hardenability Through Heavy Sections

Good hardenability means properties carry into the core of a thick section rather than stopping at a shallow case.

Six Designations On One Certificate

1.7225 42CrMo4 SCM440 42CrMo 38XM and 4140 describe this steel. The mill test certificate is issued under the name your inspector expects.

Annealed Or Heat Treated Delivery

Order annealed when the part is rough machined before heat treatment, or quenched and tempered when the shop wants to machine to final size.

Cut To Size Instead Of Full Plate

Thickness reaches 1000mm and size is customized, so a flange blank or shaft billet arrives close to the finished dimension.

Problems It Solves

What This Material Removes From Your Process

Parts Bending On Quench

Distortion after hardening means extra straightening and heavier machining stock. This grade is characterised by minimal deformation during quenching.

Certificates That Do Not Match The Drawing

A drawing marked 1.7225 and a certificate marked SCM440 can stall a batch at goods inward. The same plate is certified under the designation you order.

Soft Cores In Thick Sections

Plain carbon steel does not harden through a heavy section. The hardenability of this alloy carries the properties deeper into the part.

Buying Oversize Plate For Small Blanks

Cutting a few shaft or flange blanks out of a full plate leaves offcut you pay for and store. Cut to size supply removes it.

Application Scenarios

Where It Is Used

Shafts and Axles

Transmission and drive shafts in mechanical engineering where torque fatigue and straightness after heat treatment all matter.

Connecting Rods

Connecting rods carrying repeated tension and compression loads in engine and compressor builds.

Crankshafts

Crankshaft blanks where hardenability through the section and low quench distortion govern the machining route.

High Strength Screws and Fasteners

Screws and threaded components in moderately and highly stressed assemblies.

General Mechanical Engineering Components

Stressed machine parts in the automobile industry and mechanical engineering that need a heat treatable alloy rather than plain carbon steel.

Who It Is For

Buyers Who Specify This Product

Design engineers specifying 42CrMo4 for shafts and connecting rods on European drawings
Machine shops buying annealed plate to rough machine before sending parts out for heat treatment
Engine and compressor builders sourcing crankshaft and rod blanks
Fastener manufacturers buying alloy steel for high strength screws
Purchasing engineers reconciling a 1.7225 call out with a SCM440 or 4140 certificate
Alloy steel stockists supplying regional machining and forging shops

Technical Data

Specifications and Technical Features

Values below come from the product data published by Shandong Tianyu Metal Products. Confirm the exact grade and size against your order.

1.7225 Steel Plate specifications
Product Name	4140 SCM440 42CrMo4 38XM 42CrMo 1.7225 steel
Grade	4140 SCM440 42CrMo4 38XM 42CrMo 1.7225
Thickness	0-1000mm
Size	Customized size
Technique	Annealed quenched and tempered
Application	Shafts connecting rods crankshafts screws
Surface	Raw material milling grinding
Processing Service	Bending welding decoiling cutting punching
Sample	Available
Certificate	Mill test certificate
Place of Origin	China

Technical Features

Grades 1.7225 42CrMo4 SCM440 42CrMo 38XM and 4140
Alloy structural steel for heat treated components
Thickness 0-1000mm in customized size
Delivery condition annealed or quenched and tempered
Surface raw material milling or grinding
Processing covers bending welding decoiling cutting and punching
Applications include shafts connecting rods crankshafts and screws
Mill test certificate supplied with each order

Materials

Chromium molybdenum alloy structural steel to the 42CrMo4 composition
Supplied as 1.7225 with SCM440 42CrMo 38XM and 4140 equivalence
Heat treatable to strength levels above plain carbon structural steel

Certification

Mill test certificate supplied with each shipment

Manufacturing

How It Is Made and Processed

Steelmaking to the alloy structural steel composition
Hot rolling to plate in the ordered thickness
Annealing where machinable delivery is required
Quenching and tempering for the heat treated condition
Milling or grinding the surface as ordered
Cutting blanks to your dimensions
Bending welding decoiling and punching on request
Marking and packing for export

Quality Control

Checks Before It Ships

Mill test certificate issued under the ordered designation
Thickness checked inside the 0-1000mm range before cutting
Delivery condition confirmed as annealed or quenched and tempered
Surface inspected against the ordered raw milled or ground finish
Blank dimensions verified against the cutting list before packing

Customization

What We Can Change on Your Order

Blanks cut to your shaft rod or flange dimensions
Annealed or quenched and tempered delivery condition
Raw milled or ground surface to match the next operation
Punching and bending completed before shipment
Certificate raised as 1.7225 42CrMo4 SCM440 42CrMo 38XM or 4140

Comparison

1.7225 Steel Plate Against the Alternatives

Plain carbon structural steel plate	Carbon steel cannot be heat treated to the same strength through a heavy section, while this alloy is specified for its hardenability.
Case hardening steel	Case hardening gives a hard skin over a soft core. 42CrMo4 is through hardened by quenching and tempering, which suits shafts loaded in torsion.
High speed tool steel	Tool steel is for cutting edges, not stressed structural parts. This grade is chosen for strength toughness and low quench distortion instead.

Use Guide

Specifying Handling and Welding Notes

Rough machine annealed plate and leave finishing stock for the heat treated part
Preheat before welding because a chromium molybdenum alloy is more crack sensitive than mild steel
State the drawing designation so the certificate carries the name your inspector checks
Send blank dimensions rather than plate sizes when only a few parts are needed
Allow for the low but non zero quench movement when setting straightness tolerance on long shafts
Keep plate off the ground and covered so heavy sections do not arrive pitted

Questions Buyers Ask

1.7225 Steel Plate FAQ

Is 1.7225 the same steel as 42CrMo4 and SCM440?

Yes. 1.7225 42CrMo4 SCM440 42CrMo 38XM and 4140 are designations for the same alloy structural steel and the certificate can be issued under the one on your drawing.

What thickness range is available?

Thickness runs from 0-1000mm and size is customized, so heavy blanks as well as thin plate can be supplied.

Do you supply it annealed or quenched and tempered?

Both conditions are available. Annealed suits shops that machine before heat treatment and quenched and tempered suits those machining to final size.

What does it get used for?

High and moderately stressed components for the automobile industry and mechanical engineering, including shafts, connecting rods, crankshafts and screws.

Can you cut blanks to our drawing?

Yes. Cutting bending welding decoiling and punching are available, so you can order finished blanks instead of full plate.

Is a sample available?

Samples are available. Send the thickness and blank size you want to evaluate and we will confirm what can be released.

How much distortion should we expect after quenching?

The grade is characterised by minimal deformation during quenching, which is one of the reasons it is used for long shafts. Actual movement still depends on your part geometry and heat treatment route.

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Need a Price on 1.7225 Steel Plate

Send the grade, thickness, width and quantity you need together with your destination port. A cutting list or drawing gets you a firmer number.

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