QSCR440

2 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 QSCR440 →

QSCr440 · Q/320582 JYG19-2023

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

Material category: Cold-heading steel
Subcategory: Cold-heading steel
Material form: Wire rod
Original record status: Manufacturer source verified
Document edition: 2023 Edition; Published 2023-08-25, implemented 2023-09-25; Supersedes 2019 edition
Document title: Hot-rolled wire rod of cold-heading steel for automotive applications
Table / clause: Table 1
PDF page references: 6
Unit: Mass fraction (wt%)
Manufacturer: Jiangsu Yonggang Group Co., Ltd.

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：0.6600–0.8167Known-element contribution; incomplete value; missing Mo, V 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）：0.4583–0.5433Known-element contribution; incomplete value; missing 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：0.4850–0.5800Known-element contribution; incomplete value; missing Mo 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	0.38 ～ 0.42
Si	0.1 ～ 0.3
Mn	0.6 ～ 0.9
P	≤ 0.015 (lower limit not stated)
S	≤ 0.015 (lower limit not stated)
Cr	0.9 ～ 1.1
Ni	≤ 0.2 (lower limit not stated)
Cu	≤ 0.2 (lower limit not stated)

Applicability and limitations

Yonggang Q/320582 JYG19-2023, Table 1, row 34 (quenching-and-tempering type), PDF page 6, cast analysis wt%; orders, delivery condition and actual supply by Creation Group require separate confirmation.

Composition conditions

Table 1 heat analysis, mass fractions wt%; Dashes in the table do not mean zero..
Residual Ni and Cu mass fractions are each ≤0.20% per Clause 6.1.3; Cr in the table shall be according to the corresponding grade.
Footnote a: Al in the table refers to total aluminum; If acid-soluble aluminum Alₛ is determined, then Alₛ≥0.015%..
Applies to hot-rolled wire rod for automotive fasteners, supplied in the hot-rolled condition.; Annealing and other delivery conditions must be specified in the contract.

Verification notes

2023 public Chinese edition: Table 1 and clause 6.1 checked line by line; the appended English comparison table was not counted again.

QSCr440 · Q/320412 ZTG 5024-2023

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

Material category: Cold-heading steel
Subcategory: Cold-heading steel
Material form: Wire rod
Original record status: Manufacturer source verified
Document edition: 2023 Edition; Published and implemented on 2023-06-25; First publication
Document title: Q-series hot-rolled wire rod for cold-heading steel
Table / clause: Table 1
PDF page references: 5
Unit: Mass fraction (wt%)
Manufacturer: Zenith Steel Group Co., Ltd.

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：0.6600–0.8667Known-element contribution; incomplete value; missing V 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）：0.4600–0.5667Known-element contribution; incomplete value; missing 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：0.4850–0.6050 Envelope of independent element limits from manufacturer data; neither standard guarantee values nor measured heat results 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	0.38 ～ 0.43
Si	0.15 ～ 0.35
Mn	0.6 ～ 0.9
P	≤ 0.025 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Cr	0.9 ～ 1.2
Al	≥ 0.02 (upper limit not stated)
Ni	≤ 0.2 (lower limit not stated)
Cu	≤ 0.2 (lower limit not stated)
Mo	≤ 0.1 (lower limit not stated)

Applicability and limitations

Zhongtian Steel Q/320412 ZTG 5024-2023, Table 1, row 28 (PDF page 5), cast analysis wt%; hot-rolled wire rod, orders and supply by Creation Group require separate confirmation.

Composition conditions

Table 1 cast analysis in mass percent wt%; table dashes are not zero.
Clause 6.1.3: residual Cr, Ni and Cu each ≤0.20%, Mo≤0.10%; grade-specific table limits take precedence.
The source specifies hot-rolled delivery of wire rod and calls only for reporting measured mechanical-property data; those properties are not delivery acceptance criteria.

Verification notes

2023 public edition, Table 1 and residual-element clauses checked line by line; watermark layer excluded.