Material Grades

Stainless Steel Fasteners

Scroll through our range of stainless steel fasteners, ranging from 304/304L to ISO 3506-1 A2

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304 / 304L

Chemical compositions and mechanical properties for 304 / 304L.

Chemical compositions - 304

Element	% Present
Carbon (C)	0.07
Chromium (Cr)	17.50 - 19.50
Manganese (Mn)	2
Silicon (Si)	1
Phosphorous (P)	0.045
Sulphur (S)	0.015b
Nickel (Ni)	8.00 - 10.50
Nitrogen (N)	0.1
Iron (Fe)	Balance

Chemical compositions - 304L

Element	% Present
Carbon (C)	0.03
Chromium (Cr)	17.50 - 19.50
Manganese (Mn)	2
Silicon (Si)	1
Phosphorous (P)	0.045
Sulphur (S)	0.015b)
Nickel (Ni)	8.00 - 10.50
Nitrogen (N)	0.1
Iron (Fe)	Balance

Mechanical Properties - 304

Property	Value
Comprehensive Strength	210 MPa
Proof Stress	210 Min MPa
Tensile Strength	520 - 720 MPa
Elongation	45 Min%

Mechanical Properties - 304L

Property	Value
Proof Stress	200 Min MPa
Tensile Strength	500 - 700 MPa
Elongation	45 Min%

310

Chemical compositions and mechanical properties for 310.

Chemical Compositions - 310

Element	% Present (in product form)	% Present (in product form)
	C, H, P, L	TW* / TS*
Carbon (C)	≤0.10	≤0.15
Silicon (Si)	≤1.50	≤0.75
Manganese (Mn)	≤2.00	≤2.00
Phosphorous (P)	≤0.045	≤0.045
Sulfur (S)	≤0.015	≤0.030
Chromium (Cr)	24.00 - 26.00	24.00 - 26.00
Nickel (Ni)	19.00 - 22.00	19.00 - 22.00
Nitrogen (N)	≤0.11	-
Iron (Fe)	Balance	Balance

Mechanical Properties - 310

				Product Form	Product Form	Product Form
				C, H, P	L	TW* / TS*
Thickness a or diamter d (mm)	Thickness a or diamter d (mm)			a ≤ 12	d ≤ 25	-
Hardness HB max. 1) 2) 3)	Hardness HB max. 1) 2) 3)			192	192	-
Proof Strength3)	Proof Strength3)		Rp0.2 N/mm2	210	210	210
Proof Strength3)	Proof Strength3)		Rp1.0 N/mm2	230	230	270
Tensile Strength	Tensile Strength		Rm N/mm2	500 - 700	500 - 700	min. 500
Elongation min. in %	Elongation min. in %	Long Products	Long Products	351)	351)	334) / 355)
Elongation min. in %	Elongation min. in %	Flat Products	0.5 ≤ a/d < 3	354)5)	354)5)	354)5)6)
Elongation min. in %	Elongation min. in %	Flat Products	3 ≤ a/d	-	-	354)5)6)

316 / 316L

Chemical compositions and mechanical properties for 316 / 316L.

Chemical Composition - 316

Element	% Present
Carbon (C)	0.07
Silicon (Si)	1
Manganese (Mn)	2
Phosphorous (P)	0.045
Sulfur (S)	0.0151)
Chromium (Cr)	16.50 - 18.50
Nickel (Ni)	10.00 - 13.00
Nitrogen (N)	0.1
Molybdenum (Mo)	2.00 - 2.50
Iron (Fe)	Balance

Mechanical Properties - 316

Product Form	Thickness mm max	Yield Strength	Yield Strength	Tensile Strength	Elongation	Elongation	Impact energy (ISO-V) Room Temperature 10mm or thicker	Impact energy (ISO-V) Room Temperature 10mm or thicker
		0.2%	1%
		Rp0.2 n/mm2 min	Rp1.0 N/mm2 min	Rm N/mm2	A(1) % min (langs)	A(1) % min (quer)	J min. (längs)	J min. (quer)
C	6	240(3)	270(3)	530-680 (3)	-	40	-	-
H	12	220(3)	260(3)	530-680 (3)	-	40	90	60
P	75	220(3)	260(3)	520-670(3)	-	45	90	60
L	160	200(4)	235(4)	500-700 (4)	40	-	100	-
L	250(2)	200(5)	235(5)	500-700 (5)	-	30	-	60
T(w/s)	60	240(6)	240(6)	500-700 (5)	40	30	100	60

321 / 321H

Chemical compositions and mechanical properties for 321 / 321H.

Chemical Properties - 321 / 321H

	Cr	Ni	C	Si	Mn	P	S	N	Ti	Fe
321	min:17.0 max:19.0	min:9.0 max:12.0	max: 0.08	max: 0.75	max: 2.0	max: 0.045	max: 0.03	max: 0.10	min:5*(C+N) max:0.70	Balance
321H	min:17.0 max:19.0	min: 9.0 max:12.0	min:0.04 max:0.10	min:18.0 max:20.0	max: 2.0	max: 0.045	max: 0.03	max: 0.10	min:5*(C+N) max:0.70	Balance

Mechanical Properties - 321 / 321H

Grade	Tensile Strength ksi (min.)	Yield Strength 0.2% Offset ksi (min.)	Elongation - % in 50 mm (min.)	Hardness (Brinell) MAX
321	75	30	40	217

347

Chemical compositions and mechanical properties for 347.

Chemical Compositions - 347

Element	% Present (in product form)
Carbon (C)	0.08
Silicon (Si)	1
Manganese (Mn)	2
Phosphorous (P)	0.045
Sulfur (S)	0.015
Chromium (Cr)	17.00 - 19.00
Nickel (Ni)	9.00 - 12.00
Niobium (Nb)	10xC to 1.00
Iron (Fe)	Balance

Mechanical properties - 347

		Product Form	Product Form	Product Form	Product Form	Product Form	Product Form
		C	H	P	L	L	TW / TS
Thickness (mm) Max		8	13.5	75	160	250)	60
Yield Strength	Rp0.2 N/mm2	2203)	2003)	2003)	2054)	2056)	2055)
Yield Strength	Rp1.0 N/mm2	2503)	2403)	2403)	2404)	2406)	2405)
Tensile Strength	Rm N/mm2	520 - 7203)	520 - 7203)	500 - 7003)	510 - 7404	510 - 7406	510 - 7405
Elongation min. in &	A1) %min (longitudinal)	-	-	-	40	-	35
Elongation min. in &	A1) %min (transverse)	40	40	40	-	30	30
Impact Energy (ISO-V) ≥ 10mm thick	Jmin (longitudinal)	-	100	100	100	-	100
Impact Energy (ISO-V) ≥ 10mm thick	Jmin (transverse)	-	60	60	-	60	60

410

Chemical compositions and mechanical properties for 410.

Chemical Compositions - 410

Grade	Grade	C	Mn	Si	P	S	Cr	Mo	Ni
410	Min	-	-	-	-	-	11.5	-	-
410	Max	0.15	1	1	0.04	0.03	13.5	-	0.75

Mechanical Properties - 410

Grade	Tensile Strength (MPa) min	Elongation (% in 50mm) min	Yield Strength 0.2% Proof (MPa) min
SS 410	480	16	275

421

Chemical compositions and mechanical properties for 421.

INFO NEEDED FROM CLIENT

422

Chemical compositions and mechanical properties for 422.

Chemical Compositions - 422

Grade	Grade	C	Si	Ni	S	Mn	P	Cr	Mo	V	Cu
SS 422	Min	0.2	0.2	0.5	-	-	-	11	0.75	0.17	-
SS 422	Max	0.25	0.6	1	0.03	1	0.04	13.5	1.25	0.3	0.5

Mechanical Properties - 422

422
Grade	Tensile Strength (MPa) min	Elongation (% in 50mm) min	Yield Strength 0.2% Proof (MPa) min	Hardness	Hardness
				Rockwell B (HR B) max	Brinell (HB) max
SS 422	115	25	140	293	341

431

Chemical compositions and mechanical properties for 431.

Chemical compositions - 431

	Min	Max
Carbon	0.12	0.2
Silicon	0	1
Manganese	0	1
Nickel	1.25	3
Chromium	15	18
Phosphorous	0	0.04
Sulphur	0	0.03

Mechanical properties - 431

Condition		Annealed	*T
Tensile Strength (MPa)	Min		850
	Max		1000
0.2% Yield Strength (MPa)	Min		635
Elongation on 5.65√S0 %	Min		11
Izod Impact Valua J mm	Min		63 34
			63 20
Hardness HB	Min		248
	Max	277	302

904L

Chemical compositions and mechanical properties for 904L.

Chemical Compositions - 904L

Element%	% Present (in product form)
Carbon (C)	0.02
Silicon (Si)	0.7
Manganese (Mn)	2
Phosphorous (P)	0.03
Sulfur (S)	0.01
Chromium (Cr)	19.00 - 21.00
Nickel (Ni)	24.00 - 26.00
Nitrogen (N)	0.15
Molybdenum (Mo)	4.00 - 5.00
Copper (Cu)	1.20 - 2.00
Iron (Fe)	Balance

Mechanical properties - 904L

		Product Form	Product Form	Product Form	Product Form	Product Form	Product Form
		C	H	P	L	L	TW/TS
Thickness (mm) Max.		8	13.5	75	160	2502)	60
Yield Strength	Rp0.2 N/mm2	2403)	2203)	2203)	2304)	2305)	2306)
Yield Strength	Rp1.0 N/mm2	2703)	2603)	2603)	2603)	2603)	2503)
Tensile Strength	Rm N/mm2	530 - 7303)	530 - 7303)	520 - 7203)	530 - 7304)	530 - 7305)	520 - 7206)
Elongation min. in %	Jmin (Longitudinal)	-	100	100	100	-	120
Elongation min. in %	Jmin (Transverse)	-	60	60	-	60	90

ISO 3506-1 A4

Chemical compositions and mechanical properties for ISO 3506-1 A4.

Chemical compositions - ISO 3506-1 A4

	C	Si	Mn	P	s	Cr	Mo	Ni	Cu	N	Other elements and notes
A4	0,08	1,00	2,00	0,045	0,030	16,0 to 18,5	2,00 to 3,00	10,0 to 15,0	4,0	-	h,i

Mechanical properties - ISO 3506-1 A4

Property class	Tensile strength a Rmf min. MPa	Stress at 0,2 % non-proportional elongation b Rpf mm. MPa	Elongation after fracture A min. mm
50	500	210	0,6d
70	700	450	0,4d
80	800	600	0,3d
100	1000	800	0,2d

ISO 3506-1 A2

Chemical compositions and mechanical properties for ISO 3506-1 A2.

Chemical compositions - ISO 3506-1 A2

C	Si	Mn	P	S	Cr	Mo	Ni	Cu	N	Other elements and notes
A2	0,10	1,00	2,00	0,050	0,030	15,0 to 20,0	_f	8,o to 19,0	4,0	g,h

Mechanical properties - ISO 3506-1 A2

Stainless steel grade	Property class	Tensile strength a Rmf min. MPa	Stress at 0,2 % non-proportional elongation b Rpf mm. MPa	Elongation after fracture A min. mm
A2	50	500	210	0,6d
A2	70	700	450	0,4d
A2	80	800	600	0,3d

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