Stainless steel 904L

904L stainless steel is a non-stabilized austenitic stainless steel with low carbon content. This high alloy stainless steel is added with copper to improve its resistance to strong reducing acids, such as sulphuric acid. The steel is also resistant to stress corrosion cracking and crevice corrosion. 904L is non-magnetic, and offers excellent formability, toughness and weldability.
904L contains high amounts of expensive ingredients, such as molybdenum and nickel. Today, most of the applications that employ grade 904L are replaced by low-cost duplex stainless steel 2205.

ITEM	Stainless Steel Sheet From China Facotry
Brand	BAOSTEEL, JISCO, TISCO, etc.
Grade	201.202.301.302.304.304L.310S.316.316L.321.430.430A.309S.2205.2507.2520.430.630.631 .410.440.904Lect. Or Customized
Certificate	SGS,BV,IQI,TUV,ISO,etc
Surface	No.1, 2B, BA, 8K Mirror, Hairline,satin, Embossed,brush,No.4,HL,matt,pvc film,laser film.
Standard	GB, AISI, ASTM, ASME, EN, BS, DIN, JIS
Package	Standard export sea-worthy packing or customized
MOQ	1Ton

Chemical Composition

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	Cu
904L	min. max.	- 0.02	- 2	- 1	- 0.045	- 0.035	19 23	4 5	23 28	1 2

Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B)	Brinell (HB)
904L	490	220	36	70-90 typical	150

Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	At 20°C	At 500°C
904L	7900	190	15	-	-	11.5	-	500	952

Grade Specification Comparison

Grade	UNS No	Old British		Euronorm		Swedish SS	Japanese JIS
		BS	En	No	Name
904L	N08904	904S13	-	1.4539	X1NiCrMoCuN25-20-5	2562	-

Possible Alternative Grades

Grade	Reasons for choosing grade 904L
316L	A lower cost alternative, but with much lower corrosion resistance.
6Mo	A higher resistance to pitting and crevice corrosion is needed.
2205	A very similar corrosion resistance, with the 2205 having higher mechanical strength, and at a lower cost to 904L. (2205 not suitable for temperatures above 300°C.)
Super duplex	Higher corrosion resistance is needed, together with a higher strength than 904L.

Stainless Steel Seamless Pipe

Item	Standard	ASTM A213/A213M				ASTM A312/A312M				JIS G 3459
Grade		TP304 TP316 TP317 TP347 TP309H*		TP304L TP316L TP317L TP310S TP310H* TP321H△		TP304 TP316 TP317 TP317 TP317*		TP304L TP316L TP317L TP310S TP310H* TP321H△	SUS 304TB SUS 316TB SUS 317TB SUS 310TB SUS 321TB SUS 321HTB*	SUS 304LTB SUS 316LTB SUS 317LTB SUS 310LTB SUS 347TB
Yield Strength		≥170;  ≥205				≥170;  ≥205				≥170;  ≥205
Tensile Strength		≥485;  ≥515				≥485;  ≥515				≥485;  ≥520
Elongation		≥35				≥35				≥30;  ≥35
Flattening test(mm)		H=1.09t/(0.09+t/D)and test completeness				H=1.09t/(0.09+t/D)and test completeness				H=1.09t/(0.09+t/D)
Expanding test(mm)		Expanding rate of inside diameter is21-68％								α=60°  Expanding12%D
Grain size		"*""△"ASTM E112"△"No.7or thicker				"*""△"ASTM E112"△"No.7or thicker				“*”、JIS G0551  7# or 7#above
Hydraulic test(MPa)		D	Pmax		Hydraulic test p=220.6t/D designated by user and can be replaced by nondestructive flaw detection	D	Pmax	ASTM A530 /A530M D≤270mm P=2Rt/D in the formula R=50%σ0.2	P=2Rt/D  in the formula R=0.6σ s can be replaced by nonderstructive flaw detection
		<25.4	7
		25.4-<38.1	10			≤88.9	17
		38.1-<50.8	14
		50.8-<76.2	17			>88.9	19
		76.2-<127	24
		≥127	31
Ntergranular corrosion test		ASTM  A262  E method (supplemental requirement)				ASTM  A262  E method (supplemental requirement)				JIS G0575(special requirement)
Nondestructive flaw detection		ASTM  E213  E309  E426				ASTM  E213  E309  E426				Can use eddy current or ultrasonic flaw detection eddy current JIS G0583EV ultrasonic JIS G0582 UD
Heat treatment		Requirements				Requirements				Requirements
Permitted variations in outside diameter (mm)		Outside diameter		Permitted variations in outside diameter		Outside diameter		Permitted variations	Outside diameter	Permitted variations
		<25.4		±0.10		10.3-48.3		+0.40/-0.80	<30	±0.3
		25.4-≤38.1		±0.15		>48.3-114.3		+0.80/-0.80
		>38.1-<50.8		±0.20		>114.3-219.1		+1.60/-0.80
		50.8-<63.5		±0.25		>219.1-457.2		+2.40/-0.80	≥30	±1%
		63.5-<76.2		±0.30		>457.2-660.4		+3.20/-0.80
		76.2-≤101.6		±0.38		>660.4-864		+4.00/-0.80
		>101.6-≤190.5		+0.38/-0.64		>864-1219.2		+4.80/-0.80
Permitted variations in wall thickness		>190.5-≤228.6		+0.38/-1.14		Permitted variations in wall thickness（mm） ±12.5%t				t<2	±0.2
		Outside diameter		Permitted variations in wall thickness
		≤38.1		+20%t/-0						t≥2	±10%
		>38.1		+22%t/-0
Bending		Reasonable straightness				Reasonable straightness				Practical straightness
Other requirements		HRB<90				HRB<90				Hardness HRB<90(special requirement)