SS304 / W.Nr. 1.4301 Stainless Steel

W.Nr. 1.4301 Stainless Steel equivalent to 304 stainless steel!

　　Dual certified 304/304H is used as a material of construction up to 1500°F. Slight scaling begins at about 1200°F. This is the 0.04% minimum carbon version of type 304 stainless. It has general corrosion resistance similar to the low carbon 304/304L. However, it is subject to carbide precipitation in the heat affected zone (HAZ) of welds. Weldments may be sensitive to HAZ intergranular corrosion in oxidizing acid environments, and to polythionic acid stress corrosion cracking. The carbide precipitation is not harmful to high temperature mechanical properties.

　　304/304H is welded using the 22Cr 11Ni filler wire (ER308), or covered electrodes (E308). Post-weld heat treatment is not necessary for most high temperature service.

Chemistry

	Cr	Ni	C	Mn	Si	P	S	Fe
MIN	18.0	8.0	0.04	-	-	-	-	-
MAX	20.0	10.5	0.10	2.0	0.75	0.04	0.03	Balance

Specifications

AMS 5513
ASME SA 240
ASTM A 240, ASTM A 959
EN 1.4301
UNS S30400, UNS S30409
W. Nr./EN 1.4948
Werkstoff 1.4301

Features

• Elevated temperature service to 1500°F
• Corrosion resistance similar to 304/304L

Applications

• Pressure Vessels
• Petrochemical Equipment           
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