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Material Name
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St35
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St45
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St52
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chemical analysis
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C: ≤0.17;Si: ≤0.35;Mn: ≥0.40;P: ≤0.025; S: ≤0.025;
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C: ≤0.21;Si: ≤0.35;Mn: ≥0.40;P: ≤0.025; S: ≤0.025
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C:≤0.22;Si: ≤0.55;Mn: ≤1.60;P: ≤0.025; S: ≤0.025
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Tensile Strength
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BK, ≥480MPa; BKW, ≥420MPa;BKS, ≥420MPa;GBK, ≥315MPa;NBK,340-470MPa
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BK, ≥580MPa; BKW, ≥520MPa;BKS, ≥520MPa,GBK, ≥390MPa, NBK 440-570MPa
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BK, ≥640MPa; BKW, ≥580MPa;BKS, ≥580MPa;GBK, ≥490MPa;NBK,490-630MPa
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Yield strength
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BKS, ≥315MPa; NBK, ≥235MPa
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BKS,≥ 375MPa;
NBK≥255MPa
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BKS, ≥420MPa; NBK, ≥355MPa
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Standard
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DIN2391
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Length
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5-5.8M, 5.8M fixed length, or as customer's request
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Packaging
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Bundles Package, wooden box
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Heat Treatment/ Delivery Condition
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1.Cold finished (hard) BK(+C)
Tubes do not undergo heat treatment following the final cold forming and, thus, have a rather high resistance to deformation
2.Cold finished (soft) BKW(+LC)
The final heat treatment is followed by cold drawing involving limited deformation. Appropriate further processing allows a certain degree of cold forming (e.g. bending, expanding)
3.Cold finished and stress-relieved annealing BKS(+SR)
Heat treatment is applied following the last cold forming process. Subject to appropriate processing conditions, the increase in the residual stresses involved enables both forming and machining to a certain degree.
4.Annealed GBK(+A)
The last Cold forming process is followed by annealing in a controlled atmosphere.
5.Normalized NBK(+N)
The last cold forming process is followed by annealing above the upper transformation point in a controlled atmosphere.
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Delivery Time
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45 days
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Payment Term
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30% TT in advance, Balance to be paid before shipment
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Usage/Application
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Truck drag link, automotive parts
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Surface
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free of oxide scale, bright
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