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347H Stainless Steel Seamless Tube with Cold-Drawing Technique and Polished Surface Treatment in OD 6-630mm

Minimum Order Quantity	50 kg
Price	US $4.85-7.25 / kg

Product Details

Shape	Round	Technique	Cold-Drawing
Surface Treatment	Polished	Outside Diameter	1/2"-24"
Thickness	SCH5 SCH10 SCH40 SCH80 SCH160 XXS	Material Grade	Incone 904L, 254MO, 317L
Standard	ASTM A312, A269	Outer Diameter Tolerance	+/- 0.2mm
Thickness Tolerance	+/- 0.02mm	Length Tolerance	+/- 5mm
Density	7.96 G/cm3	Specific Heat	500 J/kg-°K
Modulus Of Elasticity	193 GPa	Thermal Conductivity	16.3 W/m-°K
Melting Range	1398 - 1446°C
Highlight	Cold-Drawing Technique Stainless Steel Seamless Tube , Polished Surface Treatment Alloy 347H Tube , OD 6-630mm UNS S34709 Tube

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Product Description

347H Stainless Steel Seamless Tube

Alloy 347H (UNS S34709) stainless steel seamless tube offers excellent resistance to intergranular corrosion and enhanced creep resistance for high-temperature applications.

Product Specifications

Parameter	Specification
Product Name	347H Stainless Steel Seamless Tube
Round Outside Diameter	1/2" - 24"
Thickness Schedule	SCH5, SCH10, SCH40, SCH80, SCH160, XXS
Material Grade	Special steel including Incone 904L, 254MO, 317L
Raw Material	TSING SHAN
Standard	ASTM A312, A269
Length	Customized to customer requirements
Tolerance	Outer Diameter: ±0.2mm, Thickness: ±0.02mm, Length: ±5mm
Surface Treatment	Annealing, pickling, sandblasting
Marking	LOGO, SIZE, STANDARD, HEAT TREATMENT, custom requests
Testing	Squash test, extended test, water pressure test, heat treatment, NDT
Applications	Industrial, exhausting, water, petroleum, chemical, nuclear industry, electric power, shipbuilding, paper making, food, decoration, machinery and construction industries

Material Properties

Alloy 347H stainless steel is stabilized by columbium and tantalum additions, providing excellent resistance to intergranular corrosion following exposure to temperatures between 800-1500°F (427-816°C).

Key Advantages

Superior resistance to intergranular corrosion
Enhanced creep and stress rupture properties
Excellent high-temperature mechanical properties
Good oxidation resistance up to 1500°F (816°C)
Superior performance in strongly oxidizing environments

Chemical Composition

Element	347 (%)	347H (%)
Chromium	17.00-19.00	17.00-19.00
Nickel	9.00-13.00	9.00-13.00
Carbon	0.08 max	0.04-0.10
Manganese	2.00 max	2.00 max
Phosphorus	0.045 max	0.045 max
Sulfur	0.03 max	0.03 max
Silicon	0.75 max	0.75 max
Columbium & Tantalum	10×(C+N) min - 1.00 max	8×(C+N) min - 1.00 max
Iron	Balance	Balance

Physical Properties

Property	Value
Density	0.288 lbs/in³ (7.96 g/cm³)
Specific Heat	0.12 BTU/lb-°F (500 J/kg-°K)
Modulus of Elasticity	28.0 × 10⁶ psi (193 GPa)
Thermal Conductivity	133 BTU/hr/ft²/ft/°F (16.3 W/m-°K)
Melting Range	2550-2635°F (1398-1446°C)
Electrical Resistivity	72 Microhm-cm at 20°F

Thermal Expansion

Temperature Range	Coefficient of Thermal Expansion
68-212°F (20-100°C)	9.2 × 10⁻⁶ in/in°F (16.0 × 10⁻⁶ cm/cm°C)
68-1112°F (20-600°C)	10.5 × 10⁻⁶ in/in°F (18.9 × 10⁻⁶ cm/cm°C)
68-1832°F (20-1000°C)	11.4 × 10⁻⁶ in/in°F (20.5 × 10⁻⁶ cm/cm°C)