DIN-50CRV4

1 source records. Standards, editions and conditions are presented separately; matching grade names do not establish interchangeability.

Refer to each source for mass fractions and analysis type. Missing values are not treated as 0. Manufacturer typical values, standard guarantees and measured heat results must remain separate. Use the material selector for calculations and condition selection.

Open condition selection, comparison and carbon-equivalent tools for DIN-50CRV4 →

DIN-50CRV4 · POSCO wire rod catalogue (local archive 1203; original edition not stated)

Chemical composition source verified; this does not verify every standard clause, actual supply or measured heat results

Material category: Spring steels
Subcategory: Spring steels
Material form: Wire rod
Original record status: Manufacturer source verified
Document edition: Local file 1203 (wire-rod pdf); the original does not state a publication edition; PDF metadata 2014-12-03 is only the file generation time
Document title: Wire rod
Table / clause: Printed page 18, composition table 5 (local table index)
PDF page references: 10
Unit: Percentages as stated in the original table; refer to the source for the specific basis
Analysis type: The catalog does not consistently specify heat or product analysis
Manufacturer: POSCO

Carbon-equivalent reference

Estimate from manufacturer-published ranges, not a standard guarantee or measured heat result; formula applicability requires review against the application and process.

IIW / CEV：0.7667–0.9933Known-element contribution; incomplete value; missing Mo, V, Ni CEV = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15; an engineering estimate of welding cold-cracking susceptibility for carbon and low-alloy steels.

Pcm（Ito–Bessyo）：0.5550–0.6933Known-element contribution; incomplete value; missing Ni, Mo, V, B Pcm = C + Si/30 + (Mn + Cu + Cr)/20 + Ni/60 + Mo/15 + V/10 + 5B; mainly used for low-carbon low-alloy steels, particularly modern low-carbon pipeline steels; more relevant when C is approximately no higher than 0.11%.

CET：0.5850–0.7350Known-element contribution; incomplete value; missing Mo, Ni CET = C + (Mn + Mo)/10 + (Cr + Cu)/20 + Ni/40; used in welding preheat assessment for ferritic steels, subject to the applicability conditions of EN 1011-2.

Composition

Element	Composition requirement
C	0.47 ～ 0.55
Si	0.15 ～ 0.4
Mn	0.7 ～ 1.1
P	≤ 0.03 (lower limit not stated)
S	≤ 0.03 (lower limit not stated)
Cr	0.9 ～ 1.2
Cu	≤ 0.3 (lower limit not stated)

Applicability and limitations

POSCO local wire rod catalogue, PDF page 10

printed page 18, table index 4, row 2. The original edition number is not stated; the PDF creation date 2014-12-03 is not the standard publication year. Manufacturer range information does not constitute our supply guarantee. The spring-steel footnote on this page gives maximum Cu 0.30%, retained for the corresponding table.

Composition conditions

Original catalog chemical composition table %, wire rod; Editions of JIS/SAE/DIN were not provided; catalog data shall not be upgraded to the verified official editions of these standards.
Dashes are not zero; cast/product analysis types are not consistently explicit. Orders, product-analysis deviations and actual supply require separate verification.
The maximum Cu for spring steel footnotes on this page is 0.30%, retained according to the corresponding table.

Verification notes

The original PDF tables and text coordinates were reconciled in both directions. Missing grade cells were restored; merged cells, footers and remarks were checked separately. Tables with identified disputes and rows without composition data are withheld.