New Design Wholesale AMS 5513/1.4948/Uns S30409/ASTM A959 Austenitic Stainless Steel Coil for Cooling Towers 304h Steel Strip

• Customization: Available
• Type: Coil
• Standard: AISI, ASTM, DIN, JIS, GB
• Model NO.: 304H Coil/Strip
• Composition: 300 Sreise
• Technique: Hot Rolled
• Shape: Coil
• Surface Treatment: Color Coated
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel
• Application: Container Plate
• Key Words: 304h Coil/Strip
• Outside Diameter: 4mm - 1219mm
• Thickness: 0.5 -100mm
• Length: as Your Requirments
• Diameter Tolerance: H9, H11, H13, K9, K11, K13 etc
• Sample: Free-Sample
• Surface: Lack, Peeled, Polishing, Bright, Sand Blast, Hl
• MOQ: 100kgs
• Stock: in Stock
• Transport Package: Wooden Package
• Specification: 304H Coil/Strip
• Trademark: LORK
• Origin: China
• HS Code: 7219350000
• Production Capacity: 50000kg/Month

Product Description

Product Description

Introduction

Unlike 304L, Type 304H has a higher carbon content making the steel more suitable for use in applications where elevated temperatures are present. It is an austenitic chromium-nickel steel alloy and the greater carbon content delivers an increased tensile and yield strength.
 

Chemical composition

The chemical composition of Grade 304H Stainless Steel is provided in the table below.

UNS NO	Grade	C	Si	Mn	P	S	Cr	Mo	Ni	N
S30409	304H	0.04/0.10	0.75	2.00	0.045	0.030	18.00/20.00	-	8.00/10.50	0.10

 

Grade Specification

Grade	UNS	DIN	EN	AMS	ASTM		JIS
304H	S30409	-	1.4948	AMS 5513	ASTM A240 ASTM A959

Mechanical properties of 304H Strip

The mechanical properties of Grade 304H Stainless Steel are provided in the table below.

UNS No	Grade	Proof Stress 0.2% (MPa)	Tensile Strength (MPa)	Elongation A5(%)	Hardness Max
					HB	HRB
S30409	304H	205	515	40	201	92

 

Physical properties of 304H Strip

 

Density g/cm	Specific heat capacity J/kg K	Thermal conductivity W/m K	Electrical resistivity2 mmym
7.93	450	17	0.71

Characteristic

Heat Resistance

• Good oxidation resistance in intermittent service to 870^O C and in continuous service to 920^O C
• Continuous use of Alloy 304 in the 425-860°C range is not recommended if subsequent aqueous corrosion resistance is important
• Alloy 304H has higher strength at elevated temperatures so is often used for structural and pressure-containing applications at temperatures above about 500°C and up to about 800°C
• Alloy 304H will become sensitized in the temperature range of 425-860°C; this is not a problem for high temperature applications, but will result in reduced aqueous corrosion resistance.

Corrosion Resistance

• Resistance to corrosion in oxidizing environments is a result from the 18 to 19% chromium that the 304 alloys contain
• Resistance to moderately aggressive organic acids is a result from the 9 to 11% nickel that the 304 alloys contain
• At times, Alloy 304L may show a lower corrosion rate than the higher carbon Alloy 304; otherwise, the 304, 304L, and 304H alloys may be considered to perform uniformly in most corrosive environments.

 

Technology

Welding Characteristics:

• readily welded by most standard processes.
• may be necessary to anneal the plate after welding
• annealing helps restore corrosion resistance lost by the sensitization.

Processing - Hot Forming:

• Working tempertarues of 1652-2102 degrees F are recommended
• meterial should be annealed at 1900 degrees F
• material should be water quenched or or rapidly cooled

Processing - Cold Forming:

• alloy is quite ductile and forms easily
• helps increase strength and hardness of alloy
• may leave alloy slightly magnetic

Machineability:

• subject to work hardening during deformation
• subject to chip breaking
• best results achieved through slower speed, heavier feeds, good lubrication, and sharp tooling

Applications

Alloy 304H Strip is often used as a material of construction up to about 1500^oF. Some examples of applications that Alloy 304H is commonly used for includes:

• Most commonly used in petroleum refineries
• Boilers
• Heat exchangers
• Condensers
• Pipelines
• Cooling towers
• Steam exhausts
• Electric generation plants
• On occasion will be found in fertilizer and chemical plants

304H stainless steel is commonly found in the oil refining, gas and chemical industry and is used in industrial boilers, pressure vessels, heat exchangers, pipelines and condensers. The material is also used throughout the power generation industry.

surface

Processing

 

Main Applications

 

Company Profile

 

Packaging & Shipping

 

FAQ