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GB/T 3077 30CrNi3 vs GB/T 3077 20CrNi3

Related Material — 69.3% match based on chemical composition and mechanical property overlap.

GB/T 3077 30CrNi3 (GB/T 3077:2015) and GB/T 3077 20CrNi3 (GB/T 3077:2015) are both steel grades. Both fall under the Alloy Steel category. GB/T 3077 30CrNi3 is typically used for hot-rolled or forged structural alloy steel bars, while GB/T 3077 20CrNi3 is commonly used for hot-rolled or forged structural alloy steel bars. GB/T 3077 30CrNi3 is defined under Guobiao Standards (GB/T), originating from China, while GB/T 3077 20CrNi3 is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 3077 30CrNi3 vs GB/T 3077 20CrNi3 is a 91.4% match. As per mechanical properties, the match is 25%. Combined, this makes them a related material overall at 69.3%.

Frequently Compared With GB/T 3077 30CrNi3:
IS 1570 (Part 7) 10Mo6H IS 1570 (Part 4) 07Cr4Mo6 UNI 11234 100Cr6 IS 1570 (Part 4) 103Cr6 IS 1570 (Part 4) 105Cr5 EN 10028-2 10CrMo9-10 IS 1570 (Part 4) 10Mo6 IS 4367 07Cr4Mo6 NF A35-565 100C6 IS 1570 (Part 4) 103Cr4 IS 1570 (Part 4) 10Cr20Mo6 IS 1570 (Part 7) 10Cr36Mo10H
Match Breakdown
CHEMISTRY MATCH
91.4%
MECHANICAL MATCH
25%
OVERALL
69.3%
Specifications
Property GB/T 3077 30CrNi3 GB/T 3077 20CrNi3
Standard GB/T 3077:2015 GB/T 3077:2015
Category Alloy Steel Alloy Steel
C (%) 0.27-0.33 0.17-0.24
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.30-0.60 0.30-0.60
Cr (%) 0.60-0.90 0.60-0.90
Ni (%) 2.75-3.15 2.75-3.15
P (%) <=0.030 <=0.030
S (%) <=0.030 <=0.030
Cu (%) <=0.30 <=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 GB/T 3077 30CrNi3 GB/T 3077 20CrNi3
Tensile Strength >=980 MPa >=930 MPa
Yield Strength >=785 MPa >=735 MPa
Elongation >=9% >=11%
Hardness <=241 HB <=241 HB
Condition Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered Quenched and tempered, test sample 25 mm; hardness is for bars delivered annealed or high temperature tempered
Typical Applications
GB/T 3077 30CrNi3
Hot-rolled or forged structural alloy steel bars
GB/T 3077 20CrNi3
Hot-rolled or forged structural alloy steel bars
Can GB/T 3077 30CrNi3 Be Substituted With GB/T 3077 20CrNi3?
GB/T 3077 30CrNi3 and GB/T 3077 20CrNi3 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.
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GB/T 3077 30CrNi3
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GB/T 3077 20CrNi3
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Frequently Asked Questions
What is the difference between GB/T 3077 30CrNi3 and GB/T 3077 20CrNi3?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 3077 30CrNi3 be substituted with GB/T 3077 20CrNi3?
GB/T 3077 30CrNi3 and GB/T 3077 20CrNi3 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.