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GB/T 3077 is for alloy structure steels. It defines the hot rolled and forging alloy structure steels’ dimension, tolerance, technical requirements, etc. Main materials are 20Mn2, 30Mn2, 40Mn2, 45Mn2, 50Mn2, 27SiMn, 20Cr, 40Cr, 30CrMo, 35CrMo, 42CrMo, etc.
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Product name |
Alloy steel seamless tube 20Mn2 40Mn2 |
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Standard |
GB/T 3077 Alloy structure steels |
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Material |
20Mn2 30Mn2 35Mn2 40Mn2 45Mn2 50Mn2 |
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Dimension |
OD: 16-245mm, WT1-32mm, Length: 3-6m |
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Delivery condition |
Stress Relieved, Quenched and tempered |
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Certificate |
ISO 9001, IATF 16949 |
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Applications |
Automotive suspension part, such as bushing, tie rod, tension pulley, drag link, stabilizer link, torque rod, etc. |
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Packaging |
Long pipe: hexagonal bundles with steel-hooped Short cut pipes: wooden box or metal frame |
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Steel Grade |
C |
Si |
Mn |
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20Mn2 |
0.17-0.24 |
0.17-0.37 |
1.40-1.80 |
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30Mn2 |
0.27~0.34 |
0.17~0.37 |
1.40~1.80 |
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35Mn2 |
0.32~0.39 |
0.17~0.37 |
1.40~1.80 |
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40Mn2 |
0.37-0.44 |
0.17~0.37 |
1.40~1.80 |
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45Mn2 |
0.42~0.49 |
0.17~0.37 |
1.40~1.80 |
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50Mn2 |
0.47~0.55 |
0.17~0.37 |
1.40~1.80 |
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Material |
Tensile strength (Mpa) |
Yield strength(Mpa) |
Elongation (%) |
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No less than |
|||
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20Mn2 |
785 |
590 |
10% |
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30Mn2 |
785 |
635 |
12% |
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35Mn2 |
835 |
685 |
12% |
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40Mn2 |
885 |
735 |
12% |
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45Mn2 |
885 |
735 |
10% |
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50Mn2 |
930 |
785 |
9% |
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1. Q: Are you a trading company or manufacturer?
   A: Dingxin is a profession steel tube manufacturer locating in Jiaxing City, Zhejiang Province.
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2. Q: How long is your delivery time?
   A: Generally it takes 30-50 days to manufacture the pipes.
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3. Q: What is your term of payment?
   A: 30% advance payment, 70% balance against B/L copy or L/C at sight.
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4. Q: What is the trade term?
   A: Trade terms could be FOB, CIF, CFR, DAP, etc.
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5. Q: What is port of landing?
   A: Shanghai port or Ningbo port.
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http://www.dingxinsteeltube.com/