SAE1018-D

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.

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SAE1018-D · Q/320582 SGGT503-2025 (Edition 0)

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: Edition 0 (2025); issued 2025-10-29; effective 2025-11-07
Document title: Hot-rolled cold-heading steel wire rod for automotive fasteners
Table / clause: Table 1
PDF page references: 5
Unit: Mass fraction (wt%)
Manufacturer: Jiangsu Shagang Steel 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：0.2767–0.4033Known-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）：0.1950–0.2732Known-element contribution; incomplete value; missing V 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：0.2300–0.3138 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	0.16 ～ 0.2
Si	≤ 0.1 (lower limit not stated)
Mn	0.7 ～ 0.9
P	≤ 0.02 (lower limit not stated)
S	≤ 0.015 (lower limit not stated)
Cr	≤ 0.1 (lower limit not stated)
Al	≥ 0.02 (upper limit not stated)
Ni	≤ 0.15 (lower limit not stated)
B	≤ 0.0008 (lower limit not stated)
Cu	≤ 0.2 (lower limit not stated)
Mo	≤ 0.05 (lower limit not stated)

Applicability and limitations

Shagang Q/320582 SGGT503-2025 (edition 0), Table 1, row 17 (PDF page 5), cast analysis wt%; applies to the hot-rolled wire rod specified by the standard. Where Table 1 specifies otherwise, the limits in that row take precedence. Orders and actual supply require separate confirmation; this is not a supply commitment by Creation Group.

Composition conditions

Table 1: heat analysis, mass fraction wt%; a dash is not zero, and unlisted elements must not be assumed to be zero.
Clause 6.1.3 residual limits: Cr≤0.20%, Ni≤0.20%, Cu≤0.20%, Mo≤0.05%; where Table 1 specifies otherwise, follow the grade entry.
Product scope: 5.0–38 mm diameter wire rod for automotive fasteners, hot rolled without twist and subjected to controlled cooling; delivery condition: hot rolled.
Table 2: oxygen≤30×10⁻⁶ and nitrogen≤70×10⁻⁶; these are not alloy-element fields in mass fraction wt%.
Clauses 6.8/6.9 call for reporting measured hardness and mechanical data for information only, not as delivery acceptance criteria; no generic mechanical values are entered.

Verification notes

The 2025 manufacturer document, Edition 0, Table 1 and clause 6.1.3 were checked row by row; cells obscured by the watermark were additionally checked against the rendered original page.