Manufacturer of 347h Stainless Steel Tube - Seamless stainless mechanical tubing – Donghao Metal Group

We can supply high quality Seamless stainless mechanical tubing / Stainless Steel Hollow bar, which use in mechanical applications where corrosion-resistant or high-temperature strength is needed.

Delivery Condition: Annealed & Pickled, Annealed & Pickled + Polished

Material: TP304/304L, TP316/316L, TP317L, TP904L, Duplex, Other grades can be offered on request.

Standards:

ASTM A790/ASME SA790 Seamless and welded ferritic/austenitic stainless steel pipe

ASTM A312/ASME SA312 Seamless and welded austenitic stainless steel pipes

ASTM A511/ASME SA511 Seamless stainless steel mechanical tubing

DIN 2448 Seamless steel pipes and tubes

DIN 6258 Hollow steel bars for machining

GOST 8731 Seamless hot rolled steel pipes – technical requirements

JIS G3459 Stainless steel pipes

Test & Inspection:

1.100% PMI / SPECTRO CHEMICAL ANALYSIS TESTS

2.100% DIMENSION TESTS & 100% VISUAL EXAMINATION 

3.TENSION TEST, FLARING TESTS(FOR SEAMLESS TUBE/PIPE)/FLANGE TESTS(FOR WELDED TUBE/PIPE), HARDNESS TEST, REVERSED FLATTENING TEST(FOR WELDED TUBE/PIPE), FLATTENING TEST (FOR SEAMLESS TUBE/PIPE)

4. 100% NON-DESTRUCTIVE TESTS

Length: Random Length / Fixed Length

Application:

Mechanical applications where corrosion resistant or high temperature strength is needed.