4130 and 25CrMo4 Cold Drawn Steel Bars
Short Answer for 4130 and 25CrMo4 Bar Buyers
Junxiong Metal can review 4130 and 25CrMo4 cold drawn steel bar enquiries in round, square, flat, hexagonal and drawing-based sections. A complete quotation requires the governing grade standard, product shape, finished size, tolerance, straightness, surface, delivery or heat-treatment condition, length, quantity, destination and MTC requirements.
4130, 25CrMo4 and 1.7218 are useful international search and comparison terms. They are not treated as automatically interchangeable: the approved standard, chemistry, mechanical-property requirements and delivery condition control the order.
Send a complete 4130 or 25CrMo4 factory RFQ or send the grade, standard, shape, size, condition and quantity by WhatsApp.
Representative Cold Drawn Round Bar Images
Image boundary: steel grade cannot be verified from appearance. These Junxiong images show a relevant cold-drawn round-bar form only and are not presented as 4130 or 25CrMo4 batch evidence.
Supply Scope and Evidence Boundary
Junxiong has confirmed commercial supply capability for this grade family. Current stock, a specific size range and a particular delivery condition are not implied until factory review. Grade-specific photos and an order or batch MTC remain release gates for paid traffic.
Evidence boundary: a supply statement or quotation is not a shipment record, current-stock declaration, heat certificate or dimensional inspection report. Each order is confirmed against the approved specification, production route and order or batch documents.
30CrMo Steel under GB/T 3077: Separate China-Standard RFQ Route
Short answer: Junxiong can review 30CrMo steel bar and cold-finished section enquiries when the buyer states the governing document, product shape, delivery condition, finished dimensions, tolerances, quantity, inspection scope and MTC requirement. 30CrMo is a separate Chinese designation route and is not relabelled as SAE 4130, 25CrMo4, 35CrMo or 34CrMo4.
| Control point | 30CrMo buyer decision |
|---|---|
| Grade and standard | Order 30CrMo to GB/T 3077-2015 or another explicitly agreed document and edition. The current official GB/T record classifies the standard under steel bars and sections. |
| Finished-product route | State round, flat, square, hexagonal or drawing-based section plus as-rolled, annealed, normalized, quenched-and-tempered, cold-drawn, peeled, turned, ground or another required condition. The grade standard alone does not define every finished cold-drawn requirement. |
| Dimensions and inspection | State size, tolerance, straightness, twist or corner radius where applicable, length, surface limits, hardness or mechanical-property requirements, decarburization controls, test items and certificate type. |
| Supply confirmation | Current stock, size feasibility, process route, MOQ, schedule and heat-specific conformity are confirmed only after factory review and order or batch documentation. |
Producer evidence boundary: Baosteel’s public long-steel manual lists 30CrMo in a producer product context. That supports the designation and upstream producer route; it is not a Junxiong stock list, cold-drawn finished-bar certificate, shipment record or heat-specific MTC.
Cross-market boundary: 30CrMo and SAE 4130 are both chromium-molybdenum alloy-steel search terms, but similarity is not substitution approval. The buyer-approved standard, chemistry, section, delivery condition, required properties and MTC control acceptance.
Technical Facts Buyers Must Confirm
| Decision | Required RFQ information |
|---|---|
| Grade route | SAE/AISI 4130, 25CrMo4, 1.7218 or another buyer-approved standard and edition. |
| Delivery condition | As-drawn, annealed, normalized, quenched and tempered or another explicitly approved condition. |
| Fabrication route | State machining, welding, cold forming or heat-treatment plans so feasibility is assessed against the ordered condition. |
| Dimensions | Finished size, dimensional tolerance, corner radius where applicable, straightness, twist and length tolerance. |
| 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. |
Shape and RFQ Selection
| Shape | Buyer must state | Factory review |
|---|---|---|
| Round bar | Diameter, tolerance, straightness, surface, length and bar-feeder or machining requirements. | Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination. |
| Square bar | Side size, tolerance, corner radius, twist, straightness and length. | Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination. |
| Flat bar | Width, thickness, edge condition, flatness, straightness and length. | Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination. |
| Hexagonal bar | Across-flats size, tolerance, twist, straightness and length. | Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination. |
| Custom profile | Dimensioned drawing, critical tolerances, corner radii, datum scheme, annual demand and trial quantity. | Starting material, process route, tooling, inspection, MOQ and schedule are reviewed for the exact grade-size-condition combination. |
Standards and Primary Reference Sources
- SAE J404: SAE publisher route for chemical compositions of SAE alloy steels; the contract must state the required edition.
- ASTM A108-24: ASTM specification route 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 25CrMo4 material data: Mill reference for the 25CrMo4 family and similar designations; it is not a Junxiong heat certificate.
- GB/T 3077-2015 official status record: China’s current alloy-structure-steel standard route for the separately controlled 30CrMo enquiry.
- Baosteel public long-steel product manual: producer evidence that lists 30CrMo; it is not Junxiong stock or batch evidence.
Reference boundary: publisher, association and mill pages support terminology and buyer verification. They are not Junxiong heat certificates and do not prove that every designation, product form or delivery condition is interchangeable.
Buyer Checklist Before Quotation
- Exact grade designation, governing standard and standard edition.
- Shape, finished dimensions and machining allowance.
- Dimensional tolerance, straightness, twist and corner-radius limits.
- Delivery and heat-treatment condition.
- Surface condition and defect limits.
- Intended machining, welding or post-delivery heat-treatment route.
- MTC, heat traceability and third-party inspection requirements.
- Quantity per size, repeat demand, destination, schedule and packing.
FAQ for 4130 and 25CrMo4 Bar Buyers
Can Junxiong supply 4130 cold drawn round bar?
Junxiong can review the requirement. Send diameter, tolerance, straightness, surface, length, delivery condition, quantity and destination. Supply is confirmed only after size and condition feasibility review.
Is 25CrMo4 exactly the same as SAE 4130?
No automatic substitution is assumed. They are commonly compared, but the ordered standard, chemistry, properties and delivery condition must be checked before quotation.
Can square, flat and hexagonal 4130 sections be reviewed?
Yes, subject to tooling, reduction route, starting material, condition and quantity. Send the exact dimensions and tolerances rather than only the grade name.
What condition should a buyer specify?
State the required delivery or heat-treatment condition and any mechanical-property or hardness range. The grade alias alone is not enough to select a condition.
Can an order include MTC and traceability?
Yes, when the certificate type, heat traceability and required test items are agreed before production.
Is 30CrMo steel the same as SAE 4130 or 25CrMo4?
No automatic equivalence or substitution is assumed. 30CrMo follows its ordered Chinese-standard route, while SAE 4130 and 25CrMo4 follow separately controlled documents. Compare the exact edition, chemistry, product form, condition and required properties before any written substitution approval.
Can Junxiong quote 30CrMo cold-drawn steel bars?
Junxiong can review a complete 30CrMo enquiry. Send the governing standard, shape, size, tolerance, straightness, condition, quantity, destination and MTC requirement. Feasibility and supply are confirmed only after factory review; the public producer reference does not prove current Junxiong stock or a matching heat.
Related Cold Drawn Steel Pages
- Cold drawn round steel bar
- Cold drawn square steel bar
- Cold drawn flat steel bar
- Cold drawn hexagonal steel bar
- Custom cold drawn steel profiles
- Factory and quality verification
- 4140 and 42CrMo4 cold drawn steel bars
- 4340, 34CrNiMo6 and EN24 cold drawn steel bars
Send the complete 4130, 25CrMo4 or 30CrMo specification for factory review.