019CR18MOTI

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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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019Cr18MoTi · GB /T 20878-2007

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

Material category: Stainless steel
Subcategory: Ferritic stainless and heat-resistant steels
Material form: Reference record
Original record status: Original standard verified
Standard edition: GB/T 20878—2007
Table / clause: Table 3, No. 90
PDF page references: 12
Unit: Mass fraction (wt%)
Analysis type: Standard composition requirements

Carbon-equivalent reference

IIW / CEV: not directly applicable to this material category

Pcm (Ito–Bessyo): not directly applicable to this material category

CET: not directly applicable to this material category

Composition

Element	Composition requirement
C	≤ 0.025 (lower limit not stated)
Si	≤ 1 (lower limit not stated)
Mn	≤ 1 (lower limit not stated)
P	≤ 0.04 (lower limit not stated)
S	≤ 0.03 (lower limit not stated)
Ni	≤ 0.6 (lower limit not stated)
Cr	16 ～ 19
Mo	0.75 ～ 1.5
N	≤ 0.025 (lower limit not stated)
Ti	≤ 0.8 (lower limit not stated)
Nb	≤ 0.8 (lower limit not stated)
Zr	≤ 0.8 (lower limit not stated)

Applicability and limitations

Original GB/T 20878—2007 composition, mass fractions wt%; Values in parentheses are maximum permitted additions. Ti, Nb, Zr or their combination must satisfy 8(C+N)–0.80; all three must not be treated as simultaneously mandatory. This standard does not guarantee cold-heading suitability or actual supply. GB/T 20878—2007 is a historical edition; This record does not replace verification of the current standard, contract or material applicability.

Combined limits

Combined-element limits

Element coefficient
Ti
1
Nb
1
Zr
1
C
-8
N
-8
Requirement
Combined Ti/Nb/Zr content ≥8(C+N)
Lower limit
0
Element coefficient
Ti
1
Nb
1
Zr
1
Requirement
Combined Ti/Nb/Zr content ≤0.80
Upper limit
0.8

Verification notes

Original historical edition GB/T 20878—2007, Table 3, item 90; The complete 45-page scan was checked; the standard has been withdrawn, and the historical edition’s applicability boundaries are retained. This row includes coupled requirements across elements; without measured composition, manual review is required, and independent intervals must not be treated as a complete assessment.