ASTM A519 Alloy Steel Mechanical Tubing

- specification covers for several grades of carbon and alloy steel mechanical , either hot-finished or cold-finished. The steel used in the mechanical may be cast in ingots or may be strand cast. When steel of different grades is sequentially strand cast, identification of the resultant transition material is required. The is a tubular product made without a welded seam. It is usually manufactured by hot working steel, and if necessary, by subsequently cold finishing the hot-worked tubular product to produce the desired shape, dimensions and properties. The tubes shall be furnished in the following shapes: round, square, rectangular and special sections. Heat analysis shall be made to determine the percentages of the elements specified. If secondary melting processes are used, the heat analysis shall be obtained from one remelted ingot or the product of one remelted ingot of each primary melt. The tubing shall be coated with a film of oil before shaping to retard rust when specified.

Mechanical Properties:

Grade Condition TS (Mpa) Ys (Mpa) E (%)
1020 CW ≥ 414 ≥ 483  ≥ 5
SR ≥ 345 ≥ 448  ≥ 10
A ≥ 193 ≥ 331  ≥ 30
N ≥ 234 ≥ 379  ≥ 22
1025 CW ≥ 448 ≥ 517  ≥ 5
SR ≥ 379 ≥ 483  ≥ 8
A ≥ 207 ≥ 365  ≥ 25
N ≥ 248 ≥ 379  ≥ 22
SR ≥ 586 ≥ 724  ≥ 10
A ≥ 379 ≥ 517  ≥ 30
N ≥ 414 ≥ 621  ≥ 20
4140 SR ≥ 689 ≥ 855  ≥ 10
A ≥414 ≥ 552  ≥ 25
N ≥ 621 ≥ 855  ≥20

Grade and Chemical composition:

Grade C Mn P S Si Cr Mo
1008 ≤ 0.10 0.30-0.50 ≤ 0.040 ≤ 0.050
1010 0.08-0.13 0.30-0.60 ≤ 0.040 ≤ 0.050
1018 0.15-0.20 0.60-0.90 ≤ 0.040 ≤ 0.050
1020 0.18-0.23 0.30-0.60 ≤ 0.040 ≤ 0.050
1025 0.22-0.28 0.30-0.60 ≤ 0.040 ≤ 0.050
1026 0.22-0.28 0.60-0.90 ≤ 0.040 ≤ 0.050
4130 0.28-0.33 0.40-0.60 ≤ 0.040 ≤ 0.050 0.15-0.35 0.80-1.10 0.15-0.25
4140 0.38-0.43 0.75-1.00 ≤ 0.040 ≤ 0.050 0.15-0.35 0.80-1.10 0.15-0.25

Size:

Hot-rolled:    OD:51-508 mm; WT: 7-60 mm; L: Max 16000 mm

Cold-Drawn: OD: 10-50 mm; WT: 2-10 mm; L: Max 16000 mm

Specifications in accordance with customer requirements.

Packing:

Beveled/black painting/plastic caps/in bundles/steel strips/wooden box/

accordance with customer requirements.

Surface treatment:

Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting, Epoxy & Fbe Coating Painting as requested

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