4140 and 42CrMo4 Cold Drawn Steel Bars

Short Answer for 4140 and 42CrMo4 Bar Buyers

Junxiong Metal can review cold drawn 4140 and 42CrMo4 steel bar enquiries in round, square, flat, hexagonal and drawing-based sections. A quotation requires the governing grade standard, product shape, finished size, tolerance, straightness, surface condition, delivery or heat-treatment condition, length, quantity, destination and MTC requirements.

4140, 42CrMo4, 1.7225 and SCM440 are useful international search and comparison terms, but they are not treated as automatically interchangeable. The approved purchase standard, chemistry, mechanical-property requirements and delivery condition control the order.

Send a complete 4140 or 42CrMo4 factory RFQ or send the shape, size, tolerance, condition and quantity by WhatsApp.

Representative Cold Drawn Square Bar Images

Representative Junxiong cold drawn square steel bars with visible square cross sections
Representative Junxiong square-bar geometry. This image does not identify a 4140 or 42CrMo4 heat.
Representative bundles of cold drawn square steel bars in the Junxiong workshop
Representative workshop and bundle evidence. Grade, condition and conformity must be established by the approved order and batch documents.

Image boundary: steel grade cannot be verified from appearance. These images show the relevant cold-drawn square-bar form only and are not presented as an order-specific 4140 MTC or shipment record.

Commercial Evidence and Its Limits

Junxiong’s private commercial archive contains a 2024 quotation for 4140 cold drawn square bar in 40 x 40 mm, 50 x 50 mm and 60 x 60 mm sections. This supports prior capability to review and quote these requirements.

Evidence boundary: a quotation is not a shipment record, heat certificate or dimensional inspection report. It does not prove current stock, a completed delivery or conformity of another order. Current supply is confirmed only against the approved specification and order/batch documentation.

Technical Facts Buyers Must Confirm

Decision Required RFQ information
Grade route SAE/AISI 4140, 42CrMo4, 1.7225, SCM440 or another buyer-approved standard and edition.
Product form Round, square, flat, hexagonal or a drawing-based cold drawn section.
Delivery condition As-drawn, annealed, normalized, quenched and tempered or another explicitly approved condition.
Dimensions Finished size, dimensional tolerance, corner radius where applicable, straightness, twist and length tolerance.
Surface Cold drawn/bright, peeled, ground or another agreed surface and defect requirement.
Inspection Heat identity, MTC type, chemistry, mechanical properties, hardness, decarburization or additional inspection requirements.
Commercial data Quantity per size, repeat demand, packing, destination country, port and required delivery schedule.

4140 and 42CrMo4 Shape Selection

Shape Buyer must state Junxiong review
Round bar Diameter, tolerance, straightness, surface, length and bar-feeder requirements. Cold drawing route, straightening, surface and order documentation.
Square bar Side size, tolerance, corner radius, twist, straightness and length. Section feasibility, tooling route and inspection method.
Flat bar Width, thickness, edge condition, flatness, straightness and length. Reduction route, edge control and dimensional inspection.
Hexagonal bar Across-flats size, tolerance, twist, straightness and length. Tooling, section control and packing.
Custom profile Dimensioned drawing, critical tolerances, corner radii, datum scheme and annual demand. Drawing review, tooling, trial route, inspection and MOQ.

International Grade Names and Substitution Control

Buyer search route Common enquiry name What must control the order
United States and Canada SAE 4140, AISI 4140, 4140 cold drawn bar Buyer-approved SAE/AISI requirement plus the applicable bar-product standard.
Germany and Europe 42CrMo4, 1.7225, 42CrMoS4 Exact EN grade, sulfur route where applicable, delivery condition and required properties.
Japan and Asia SCM440, JIS alloy steel bar Exact JIS grade and edition; no automatic substitution from a search alias.
Cross-market comparison 4140 equivalent, 4140 vs 42CrMo4 Written approval after chemistry, hardenability, condition, properties and MTC review.

Important: these names help buyers find the correct discussion. They are not a declaration that every 4140, 42CrMo4, 1.7225 or SCM440 specification is identical.

Standards and Primary Reference Sources

  • SAE J404: the SAE publisher route for chemical compositions of SAE alloy steels. The edition required by the contract must be stated.
  • ASTM A108-24: the active ASTM specification for carbon and alloy cold-finished steel bars.
  • BS EN 10277:2018: technical delivery conditions for bright steel products in drawn, peeled/turned or ground condition.
  • Ovako 42CrMo4 material data: a mill technical reference that lists SAE 4140 and 1.7225 among similar designations and shows why variant and condition matter.

Reference boundary: publisher and mill pages identify possible procurement routes. They are not Junxiong heat certificates and do not prove that every 4140, 42CrMo4, 1.7225 or SCM440 order has identical chemistry, hardenability or mechanical properties.

Buyer Checklist Before Quotation

  • Exact grade designation, governing standard and standard edition.
  • Shape and finished dimensions.
  • Dimensional tolerance, straightness, twist and corner-radius limits.
  • Delivery and heat-treatment condition.
  • Surface condition and defect limits.
  • Hardness or mechanical-property requirements.
  • MTC, heat traceability and third-party inspection requirements.
  • Quantity per size, repeat demand, destination and packing.

FAQ for 4140 and 42CrMo4 Buyers

Can Junxiong supply 4140 cold drawn square bar?

Yes, Junxiong can review 4140 cold drawn square-bar requirements. Send the side size, tolerance, corner radius, twist, straightness, length, condition, quantity and destination. Historical quotation records support prior square-bar review, while every new order still requires current feasibility and documentation confirmation.

Is 42CrMo4 exactly the same as SAE 4140?

No automatic substitution is assumed. They are commonly compared, but the customer-approved standard, chemistry, condition, properties and MTC must be checked before quotation or substitution.

Can round, flat and hexagonal sections also be reviewed?

Yes. State the exact shape and dimensions. Each grade-size-condition combination is reviewed separately because tooling, reduction route and inspection requirements differ.

What heat-treatment information is required?

State whether the order is as-drawn, annealed, normalized, quenched and tempered or subject to a buyer-defined property range. Do not rely on the grade name alone.

Can Junxiong provide an MTC?

MTC and heat-traceability requirements can be included by order when stated before production. The required certificate type and test items must be agreed in the quotation.

Related Cold Drawn Steel Pages

Send the complete 4140 or 42CrMo4 specification for factory review.

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