Technical data for SCM435 wire rod for cold forming, compliant with JIS G4053. View the chemical composition, mechanical properties, and related technical requirements of the current grade.
Elements not specified in this table shall not be intentionally added, except where necessary for steelmaking purposes. Note a) Shall not be intentionally added. b) For SNCM630, the lower limit for Mo may be 0.30% upon agreement between supplier and purchaser. c) Al content for SACM645 is 0.70% ~ 1.20%.
2. Mechanical properties of wire rod
Mechanical property values shall be determined by agreement between the supplier and the purchaser.
3. Dimensional Tolerances
Table 8 - Dimensional tolerances for hot-rolled wire rod
Diameter
Diameter tolerance
Out-of-roundness
<15
±0.3
<0.4
15<d≤25
±0.4
<0.5
25<d≤32
±0.5
<0.6
32<d≤50
±0.6
<0.7
Tolerances for wire rod with a diameter exceeding 50 mm shall be determined by agreement between the supplier and the purchaser. Note a) Out-of-roundness refers to the difference between the maximum and minimum diameters measured on the same cross-section of the wire rod.
FAQ
Frequently Asked Questions
What product form is shown for SCM435 on the page?
The page lists SCM435 as wire rod, not cold heading wire (CHQ wire). This is the initial product form — hot-rolled rod used as input for cold forming processes. There is also a separate SCM435WCH page on the site; that variant follows JIS G3509 and includes hardenability and decarburization control categories in the material data, making it more directly aligned with cold heading applications.
What standard is referenced on the SCM435 page?
The page references JIS G4053 — Carbon and Alloy Steels for Machine Structural Purposes. The main alloying elements are chromium (Cr) and molybdenum (Mo).
Are the mechanical properties for SCM435 fixed on the page?
No, they are not fixed. The 'Technical Delivery Condition' field on the page is empty. JIS G4053 indicates that mechanical property values for SCM435 are to be agreed between buyer and seller at the time of order. Buyers should provide specific mechanical property requirements when inquiring, to be confirmed by the supplier.
What is the relationship between SCM435 and SCM435WCH on the site?
Both are listed as wire rod, but under different standards: SCM435 follows JIS G4053 and SCM435WCH follows JIS G3509. The material data for SCM435WCH includes hardenability and decarburization control categories, indicating it is suited for cold heading use. If your application has hardenability or decarburization requirements, consult with the supplier to confirm whether the JIS G3509 variant (SCM435WCH) is appropriate.
What should a buyer provide when requesting SCM435 wire rod?
For an accurate quotation, provide: ① Grade and standard (JIS G4053); ② Target size, dimensional tolerance, and delivery-condition requirements (JIS G4053 contains dimensional tolerance provisions; the applicable specifications should be confirmed before quotation); ③ Surface quality requirements (smooth, seamless, no seams/scratches/dents); ④ Mechanical-property requirements; ⑤ Packaging preference (coils / straight lengths / wooden crates). More detail leads to a more accurate quotation.
Chemical composition, mechanical properties, tolerances and delivery condition must be confirmed against the applicable standard edition, customer drawing and order specification.
RFQ CHECKLIST
What to include in the enquiry
Grade and applicable standard
Diameter or section, delivery condition and quantity
Drawing, forming route or failure photos when available
