Post Stock Login Register

GB/T 699 35 vs GB/T 699 20Mn

Related Material — 66.2% match based on chemical composition and mechanical property overlap.

GB/T 699 35 (GB/T 699:2015) and GB/T 699 20Mn (GB/T 699:2015) are both steel grades. Both fall under the Carbon Steel category. GB/T 699 35 is typically used for used for shafts, connecting rods, bolts, forged parts, gears, and machine components., while GB/T 699 20Mn is commonly used for hot-rolled or forged quality carbon structural steel bars up to 250 mm. GB/T 699 35 is defined under Guobiao Standards (GB/T), originating from China, while GB/T 699 20Mn is defined under Guobiao Standards (GB/T), originating from China.

As per chemical composition, GB/T 699 35 vs GB/T 699 20Mn is a 86.9% match. As per mechanical properties, the match is 25%. Combined, this makes them a related material overall at 66.2%.

Frequently Compared With GB/T 699 35:
BS 970 (Part 1) 040A10 BS 970 (Part 3) 070M55 BS 970 (Part 1) 040A04 BS 970 (Part 1) 040A12 BS 970 (Part 1) 045A10 BS 970 (Part 1) 045A10 BS 970 (Part 3) 045A10 BS 970 (Part 1) 045M10 BS 970 (Part 1) 045M10 BS 970 (Part 3) 045M10 BS 970 (Part 1) 055M15 BS 970 (Part 1) 060A32
Match Breakdown
CHEMISTRY MATCH
86.9%
MECHANICAL MATCH
25%
OVERALL
66.2%
Specifications
Property GB/T 699 35 GB/T 699 20Mn
Standard GB/T 699:2015 GB/T 699:2015
Category Carbon Steel Carbon Steel
C (%) 0.32-0.39 0.17-0.23
Si (%) 0.17-0.37 0.17-0.37
Mn (%) 0.50-0.80 0.70-1.00
P (%) <=0.035 <=0.035
S (%) <=0.035 <=0.035
Cr (%) <=0.25 <=0.25
Ni (%) <=0.30 <=0.30
Cu (%) <=0.25 <=0.25
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 699 35 GB/T 699 20Mn
Tensile Strength >=530 MPa >=450 MPa
Yield Strength >=315 MPa >=275 MPa
Elongation >=20% >=24%
Hardness <=197 HB (as delivered, not heat treated) <=197 HB (as delivered, not heat treated)
Condition Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state Normalized 25 mm sample blank, bars up to 80 mm; hardness for delivery state
Typical Applications
GB/T 699 35
Used for shafts, connecting rods, bolts, forged parts, gears, and machine components.
GB/T 699 20Mn
Hot-rolled or forged quality carbon structural steel bars up to 250 mm
Can GB/T 699 35 Be Substituted With GB/T 699 20Mn?
GB/T 699 35 and GB/T 699 20Mn 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.
Forms & Sizes Available on M-EX
GB/T 699 35
Round Bar → (2 listings)
Diameter: 40–40 mm (1.57–1.57 in)
Length: 6500–6900 mm (255.91–271.65 in)
GB/T 699 20Mn
No active listings currently.
On M-EX Right Now
GB/T 699 35
2 active listings and RFQs →
GB/T 699 20Mn
0 active listings and RFQs →
Frequently Asked Questions
What is the difference between GB/T 699 35 and GB/T 699 20Mn?
Both grades share a similar composition profile; see the specification table above for the exact chemistry and mechanical property values.
Can GB/T 699 35 be substituted with GB/T 699 20Mn?
GB/T 699 35 and GB/T 699 20Mn 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.