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IS 1570 (Part 7) 7Cr18Ni11NbH vs ASTM A959 .-

Minimal Match — 35% match based on chemical composition and mechanical property overlap.

IS 1570 (Part 7) 7Cr18Ni11NbH (IS 1570 (Part 7):1992) and ASTM A959 .- (ASTM A959:2011) are both steel grades. Both fall under the Stainless Steel category. IS 1570 (Part 7) 7Cr18Ni11NbH is typically used for boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature, while ASTM A959 .- is commonly used for wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1). IS 1570 (Part 7) 7Cr18Ni11NbH is defined under Bureau of Indian Standards (IS), originating from India, while ASTM A959 .- is defined under ASTM International, originating from United States.

As per chemical composition, IS 1570 (Part 7) 7Cr18Ni11NbH vs ASTM A959 .- is a 65.5% match. Mechanical property data is not available for both grades, so this factor could not be scored. Combined, this makes them a minimal match overall at 35%.

Frequently Compared With IS 1570 (Part 7) 7Cr18Ni11NbH:
IS 1570 (Part 7) 11Cr17Ni13W3TiH IS 1570 (Part 7) 12Cr12MoH IS 1570 (Part 7) 12Cr12MoVH IS 1570 (Part 7) 12Cr12Ni2Mo GOST 5632 06Kh23N28 GOST 5632 08X18H10 EN 10088-1 1.4301 GB/T 3280 06Cr19Ni10 EN 10088-1 1.4006 EN 10088-1 1.4401 EN 10088-1 1.4845 IS 1570 (Part 7) 12Cr13H
Match Breakdown
CHEMISTRY MATCH
65.5%
MECHANICAL MATCH
No shared data
OVERALL
35%
Specifications
Property IS 1570 (Part 7) 7Cr18Ni11NbH ASTM A959 .-
Standard IS 1570 (Part 7):1992 ASTM A959:2011
Category Stainless Steel Stainless Steel
C (%) 0.04-0.10 <=0.030
Si (%) <=0.75 <=1.00
Mn (%) <=2.00 <=1.00
P (%) <=0.045 <=0.040
S (%) <=0.030 <=0.030
Cr (%) 17.00-19.00 18.0-20.0
Ni (%) 9.00-13.00 <=0.50
Nb+Ta (%) >=10xC, <=1.00 Not specified
Cb (%) Not specified 0.10-0.60
N (%) Not specified <=0.030
Ti (%) Not specified 0.07-0.30
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Mechanical Properties
Property IS 1570 (Part 7) 7Cr18Ni11NbH ASTM A959 .-
Tensile Strength 510-710 MPa Not specified
Yield Strength >=205 MPa (0.2 % proof stress) Not specified
Elongation >=30% Not specified
Condition Pipes, bars, forgings, plates, Q, thickness - (first row of Table 3) Not specified
Typical Applications
IS 1570 (Part 7) 7Cr18Ni11NbH
Boilers, pressure vessels, steam turbines, steam and water piping and other power plant equipment working at elevated temperature
ASTM A959 .-
Wrought stainless steel products; recommended composition limits for adoption by product standards (clause 1.1)
Key Differences
Can IS 1570 (Part 7) 7Cr18Ni11NbH Be Substituted With ASTM A959 .-?
IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 .- share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.
On M-EX Right Now
IS 1570 (Part 7) 7Cr18Ni11NbH
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ASTM A959 .-
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Frequently Asked Questions
What is the difference between IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 .-?
IS 1570 (Part 7) 7Cr18Ni11NbH specifies Nb+Ta which is not specified for ASTM A959 .-. ASTM A959 .- specifies Cb, N, Ti which are not specified for IS 1570 (Part 7) 7Cr18Ni11NbH.
Can IS 1570 (Part 7) 7Cr18Ni11NbH be substituted with ASTM A959 .-?
IS 1570 (Part 7) 7Cr18Ni11NbH and ASTM A959 .- share some compositional similarity but differ enough that substitution should not be assumed. Review the differences above carefully, and consult the applicable standard or a metallurgist before using one in place of the other.