7MNB8

3 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 7MNB8 →

7MnB8 · EN 10263

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

Material form: Drawn wire
Original record status: Reference transcription of standard
Standard edition: BS EN 10263-2:2017
Table / clause: Table 2

Carbon-equivalent reference

IIW / CEV：0.3683–0.4150 Known-item contribution, not a complete value; missing Cr, Mo, V, Ni, Cu 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）：0.1575–0.1958 Known-item contribution, not a complete value; missing Cu, Cr, 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：0.2450–0.2850 Known-item contribution, not a complete value; missing Mo, Cr, Cu, 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	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Al	0.02 ～ 0.04

Applicability and limitations

Note e for optional additions: Cr≤0.2, Mo≤0.05, Ni≤0.25, V=0.03~0.05, Ti=0.06~0.1, B=0.0015~0.0030%; Not all are mandatory additions. Note f: Patents exist for specific applications. No edition is stated on the website; Displayed under this source edition; contract applicability is not established

Verification notes

Standard source: BS EN 10263-2:2017 · Table 2View associated products →

7MnB8 · EN 10263-2-2017

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

Material form: Reference record
Original record status: Original standard verified
Standard edition: EN 10263-2-2017
Table / clause: Table 2 and notes a–f

Carbon-equivalent reference

Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.

Default composition in Table 2, Al deoxidation condition

Default composition in Table 2, Al deoxidation condition; Al is replaced by elements with equivalent effect; the replacement elements and contents require separate verification

Composition record (conditional branches apply; this is not an unconditional requirement)

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Al	0.02 ～ 0.04

Applicability and limitations

Heat-analysis mass fractions wt%; See Table 3 separately for product-analysis tolerances. ; Note b permits aluminum to be replaced by other elements with a similar effect; composition of replacement elements must not be inferred before they are identified. ; Unlisted elements must not be intentionally added without purchaser consent, except additions needed to finish the heat; Residual elements must not impair properties or suitability; unlisted content does not mean zero. ; This standard covers cold heading and cold extrusion; actual delivery condition, dimensions, surface and mechanical properties require separate verification, and no supply product is created automatically. ; Note e permits addition of Cr/Mo/Ni/V/Ti/B; this is not a default mandatory constituent in Table 2; The actual selection must be confirmed at enquiry or ordering. Note f identifies patents associated with specific applications.

Original condition-branch records

Default composition in Table 2, Al deoxidation condition

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Al	0.02 ～ 0.04

Default composition in Table 2, Al deoxidation condition; Al is replaced by elements with equivalent effect; the replacement elements and contents require separate verification

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)

A condition branch must be selected

Yes

Verification notes

The original Table 2 and footnotes have been checked; Optional additions and agreed provisions require separate confirmation

7MnB8 · DIN EN 10263-2-2018

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

Material form: Reference record
Original record status: Original standard verified
Standard edition: DIN EN 10263-2:2018-02
Table / clause: Tabelle 2 and footnote a–f; Tabelle 3 product-analysis tolerances require separate verification
PDF page references: 1、9
Unit: Mass fraction (wt%)
Analysis type: Heat analysis

Carbon-equivalent reference

Estimates are presented separately for each applicable composition condition. Match the actual ordering conditions; ranges must not be combined.

Default composition in Table 2, Al deoxidation condition

Default composition in Table 2, Al deoxidation condition; Al is replaced by elements with equivalent effect; the replacement elements and contents require separate verification

Composition record (conditional branches apply; this is not an unconditional requirement)

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Al	0.02 ～ 0.04

Applicability and limitations

DIN EN 10263-2:2018-02 is the German-language edition of EN 10263-2:2017; This record was verified against heat analysis and footnotes in Table 2 of the official German edition. ; Heat-analysis mass fractions wt%; See Table 3 separately for product-analysis tolerances. ; Note b permits aluminum to be replaced by other elements with a similar effect; composition of replacement elements must not be inferred before they are identified. ; Unlisted elements must not be intentionally added without purchaser consent, except additions needed to finish the heat; Residual elements must not impair properties or suitability; unlisted content does not mean zero. ; This standard covers cold heading and cold extrusion; actual delivery condition, dimensions, surface and mechanical properties require separate verification, and no supply product is created automatically. ; Note e permits addition of Cr/Mo/Ni/V/Ti/B; this is not a default mandatory constituent in Table 2; The actual selection must be confirmed at enquiry or ordering. Note f identifies patents associated with specific applications.

Original condition-branch records

Default composition in Table 2, Al deoxidation condition

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)
Al	0.02 ～ 0.04

Default composition in Table 2, Al deoxidation condition; Al is replaced by elements with equivalent effect; the replacement elements and contents require separate verification

Element	Composition requirement
C	0.06 ～ 0.09
Si	0.15 ～ 0.25
Mn	1.85 ～ 1.95
P	≤ 0.015 (lower limit not stated)
S	≤ 0.025 (lower limit not stated)

A condition branch must be selected

Yes

Verification notes

Row 9 of Table 2 and its footnotes verified against the official German edition DIN EN 10263-2:2018-02; The EN version year adopted is 2017.