Technical Info

C	Mn	P	S	Si	Cr	Mo
0.37-0.49	0.65-1.10	0.035 Max	0.04 Max	0.15-0.35	0.75-1.20	0.15-0.25
Dia	Minimum Tempering Temperature ( ° F )	Tensile Strength min, Ksi ( MPa)	Yield Strength. min, 0.2% offset, Ksi ( MPa)	Elongation in 4D min %	Reduction of Area min %	Hardness max
2 1/2" & under	1,100 (593 ° C )	125(860)	105(720)	16	50	321HB or 35 HRc
Over 2 1/2" to 4"	1,100 (593 ° C )	115(795)	95(655)	16	50	302HB or 35 HRc
Over 4" to 7"	1,100 (593 ° C )	100(690)	75(515)	18	50	277HB or 29 HRc

C	Mn	P	S	Si	Cr	Mo
0.37-0.49	0.65-1.10	0.035 Max	0.04 Max	0.15-0.35	0.75-1.20	0.15-0.25
Dia	Minimum Tempering Temperature ( ° FC )	Tensile Strength min, Ksi ( MPa)	Yield Strength. min, 0.2% offset, Ksi ( MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness max
2 1/2" & under	1150 (620 ° C )	100(690)	80(550)	18	50	235HB, 99HRB

C	Mn	P	S	Si	Cr	Mo	Al	V
0.36-0.47	0.45-0.70	0.035 Max	0.04 Max	0.15-0.35	0.80-1.15	0.50-0.65	0.015Max	0.25-0.35
Dia	Minimum Temperature ° F (°C)	Tensile Strength min, ksi ( MPa)	Yield Strength. min, 0.2% offset, Ksi ( MPa)	Elongation in 4D min %s	Reduction of Area min %	Hardness max
2 1/2" & under	1200(650)	125(860)	105(725)	18	50	321HB or 35 HRC
Over 21/2" to 4"	1200(650)	110(760)	95(655)	17	45	302HB or 33 HRC
Over 4" to 7"	1200(650 )	100(690)	85(586)	16	45	227HB or 29 HRC

ASTM A193 B5 (5% Cr AISI 501)

C	Mn	P	S	Si	Cr	Mo
0.10 max	1.00 max	0.040 max	0.030 Max	1.0 Max	4.00 - 6.00	0.40 -0.65
Dia	Minimum Tempering Temperature ° F (°C)	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness max
up to 4" incl	1.100 (593 )	100(690)	80(550)	16	50	-

ASTM A193 B8 (AISI 304) B8A Chemical Requirements

C	Mn	P	S	Si	Cr	Ni
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	18.00 - 20.00	8.00 -10.50

ASTM A193 B8C (AISI 347) B8CA

C	Mn	P	S	Si	Cr	Ni	Columbium + Tantalum
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00 - 19.00	9.00 -13.00	10 x Carbon content, min

ASTM A193 B8N (AISI 304N) B8NA

C	Mn	P	S	Si	Cr	Ni	Nitrogen
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	18.00 - 20.00	8.00 -10.50	0.10 - 0.16

ASTM A193 B8MN (AISI 316N) B8MNA

C	Mn	P	S	Si	Cr	Ni	Mo	Nitrogen
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	16.00 - 18.00	10.00 -14.00	2.00 - 3.00	0.10 - 0.16

ASTM A193 B8P (AISI 305) B8PA

C	Mn	P	S	Si	Cr	Ni
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00 - 19.00	10.50 -13.00

ASTM A193 B8T (AISI 321) B8TA

C	Mn	P	S	Si	Cr	Ni	Titanium
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00 - 19.00	9.00 -12.00	5 x Carbon content, min

ASTM A193 B8R B8RA

C	Mn	P	S	Si	Cr	Ni	Mo	Nitrogen	Columbium + Tanalum	V
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	20.50 - 23.50	11.50 -13.50	1.50 - 3.00	0.20 - 0.40	0.10 - 0.30	0.10 - 0.30

ASTM A193 B8S B8SA

C	Mn	P	S	Si	Cr	Ni	Nitrogen
0.10 Max	7.00 - 9.00	0.040 Max	0.030 Max	3.50 - 4.50	16.00 - 18.00	8.00 - 9.00	0.08 - 0.18

ASTM A193 B8LN, B8LNA

C	Mn	P	S	Si	Cr	Ni	Mo	Nitrogen
0.030 Max	2.00	0.045 Max	0.030 Max	1.00	18.00 - 20.00	8.00 - 10.50	-	0.10 - 0.16

B8MLN, B8MLNA

C	Mn	P	S	Si	Cr	Ni	Mo	Nitrogen
0.030 Max	2.00	0.045 Max	0.030 Max	1.00	16.00 - 18.00	10.00 - 14.00	2.00 - 3.00	0.10 - 0.16

CLASS I: B8, B8C, B8M, B8P, B8T, B8LN, B8MLN Mechanical Requirements

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated	75(515)	30(205)	30	50	223 HB or 96HRB (3/4" in & smaller, 241HB or 100 HRB)

CLASS IA: B8A, B8CA, B8MA, B8PA, B8TA, B8LNA, B8MLNA, B8NA, B8MN4

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated in the finished conditions	75(515)	30(205)	30	50	192 HB or 90HRB

CLASS IB: B8N, B8MN

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated	80(550)	35(240)	30	40	223 HB or 96HRB (3/4" in & smaller, 241HB or 100 HRB)

CLASS IC: B8R

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated	100(690)	55(380)	35	55	271 HB or 28 HRC

CLASS IC: B8RA

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated	95(655)	50(345)	35	55	271 HB or 28 HRC

CLASS IC: B8S

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated in the finished condition	100(690)	55(380)	35	55	271 HB or 28 HRC

CLASS IC: B8SA

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
All diameters	Carbide Solution Treated in the finished condition	95(655)	50(345)	35	55	271 HB or 28 HRC

CLASS 2: B8, B8C, B8P, B8T, B8N

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
3/4" & under	Carbide Solution Treated and Strain Hardened	125(860)	100(690)	12	35	321 HB or 35 HRC
over 3/4" & 1" incl		115(795)	80(550)	15	35
over 1" & 11/4" incl		105(725)	65(450)	20	35
11/4" to 11/2" incl		100(690)	50(345)	28	45

CLASS 2: B8MN / B8M

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
3/4" & under	Carbide Solution Treated and Strain Hardened	110(760)	95(655)	15	45	321 HB or 35 HRC
over 3/4" & 1" incl		100(690)	80(550)	20	45
over 1" & 11/4" incl		95(655)	65(450)	25	45
11/4" to 11/2" incl		95(655)	75(515)	25	40

CLASS 2B: B8M2

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
2" & under	Carbide Solution Treated and Strain Hardened	95(655)	75(515)	25	40	321 HB or 35 HRC
over 2" & 21/2" incl		90(620)	65(450)	30	40
over 21/2" to 3" incl		80(550)	55(380)	30	40

Low-Temperature Alloy Steel Bolt Material Chemical & Mechanical Requirements
ASTM A320-L7 (Cr- Mo AISI 4140,4142,4145 )
This material is considered as the most suitable for bolts to be used at temperature 0-(-)100 ° C, The chemical properties and physical characteristics are as follows:

C	Mn	P	S	Si	Cr	Mo	Impact Energy Absorption Requirements
0.38-0.48	0.75-1.00	0.035 Max	0.04 Max	0.15-0.35	0.80-1.10	0.15-0.25	Minimum Impact Value	Minimum Impact Value
Dia	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness max		Required for Average of Each set of three specimens ft lbf [J]	Permitted for Specimen only of a set ft lbf [J
21/2" and under	125 ( 860 )	105 ( 725 )	16	50	277-321HB for reference		20[27]	15[20]

ASTM A 320 L7M

Dia	Heat Treatment	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Reduction of Area min %	Hardness Max
21/2" and under	Quenched and tempered at 1,150 ° F (620 ° C) min	100(690)	80(550)	18	50	235HB or 99HRB

ASTM A320 B8 (18Cr-8Ni AISI 304)
This material is considered as the most suitable for bolts and nuts to be used at temperatures (-)100-(-)200 ° C The chemical properties are as follows:

C	Mn	P	S	Si	Cr	Ni
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	18.00-20.00	8.00-10.50

ASTM A320 B8M

C	Mn	P	S	Si	Cr	Ni	Mo
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	16.00-18.00	10.00-14.00	2.00-3.00

ASTM A320 B8C

C	Mn	P	S	Si	Cr	Ni	Columbium + Tantulum
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00-19.00	9.00-13.00	10 * Carbon content, min

ASTM A320 B8T

C	Mn	P	S	Si	Cr	Ni	Titanium
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00-19.00	9.00-12.00	5 * Carbon content, min

Super High Temperature Resistant Bolt Material Chemical & Mechanical Requirements
This material is considered as suitable for bolts to be used as temperature below 1,200 ° F (650 ° C) and the material has superior resistence to oxidation and shrinkage to those high temperature resistant bolt material mentioned so far. The chemical properties and physical characteristics are as follows:

ASTM A453 Gr. 660

C	Mn	P	S	Si	Cr
0.08 Max	2.00 Max	0.040 Max	0.030 Max	1.00 Max	24.00-27.00
Cr	Mo	Ti	Al	V	Boron
13.50-16.00	1.00-1.50	1.90-2.35	0.35 Max	0.10-0.50	0.0010 - 0.010
CLASS	Tensile Strength min, ks (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 4x Dia. min,%	Reduction of Area min, %	Brinell Hardness Number
A,B and C	130(895)	85(585)	15	18	248-341 (min 99HRB, max 37HRC)

ASTM A453 Gr. 651

C	Mn	P	S	Si	Cr
0.28 - 0.35	0.75 -1.50	max 0.040	max 0.030	0.30 - 0.80	8.00-11.00
Cr	Mo	Ti	W	Cb	Cu
18.00-21.00	1.00-1.50	0.10 - 0.35	1.00 - 1.75	025 - 0.60	max 0.50
CLASS	Tensile Strength min, ks (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 4x Dia min, %	Reduction of Area min, %	Brinell Hardness Number
A ( 3" and under)	100(690)	70(485)	18	35	217-277 (min 95HRB, max 28HRC)
A (over 3")	-	60(415)	-	-	-
B ( 3" and under)	95(655)	60(415)	18	35	217-277 (min 95HRB, max 28HRC)
B (over 3")	-	50(345)	-	-	-

ASTM B408 (800,800H)

Ni	Cr	Fe	Mu	C	Cu	Si	S	Al	Ti
30.0 - 35.0	19.0 - 23.0	*39.5 min	1.5 Max	0.10 Max	0.75 Max	1.0 Max	0.015 Max	0.15 - 0.60	0.15 - 0.60

* = Iron shall be determined arithmetically by difference

Class	Condition	Tensile Strength min, ksi (MPa)	Yield Strength. min, Ksi (MPa)	Elongation in % min
800	(all sizes) Hot finished rods and bars	80(550)	35(240)	25
	(all sizes) Cold drawn and (annealed) Hot finished rods and bars	75(520)	30(205)	30
800H	(all sizes) Cold drawn and (annealed) Hot finished rods and bars	65(450)	25(170)	30

HASTALLOY C/ASME SB336,UNS N10002

Class	Ni	Co	Cr	Mo	W	Fe	Si	Mn	C
C	Balance	< 2.5	16	16	4	5	< 1.00	< 1.00	< 0.08

Monel K-500

Ni	C	Mn	Fe	S	Si	Cu	Al	Ti
63 - 70	0.25 Max	1.50 Max	2.00 Max	0.01 Max	0.5 Max	balance	2.3 - 3.15	0.35 - 0.85

Monel 400

Ni	C	Mn	Fe	S	Si	Cu
63 - 70	0.30 Max	2.0 Max	2.5 Max	0.024 Max	0.050 Max	balance

Nut Material Chemical & Mechanical Requirements
ASTM A194 Gr.2H
This is the material for bolts made from ASTM A-193 B7, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Brinell Hardness	Rockwell Hardness
0.40 Min	1.00 Max	0.040 Max	0.050 Max	0.40 Max	To 11/2" incl 248 to 352	24 to 38 HRC
					Over 11/2",212 to 352	38 HRC Max

ASTM A194 Gr.2HM
This is the material for bolts made from ASTM A-193 B7, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Brinell Hardness	Rockwell Hardness
0.40 Min	1.00 Max	0.040 Max	0.050 Max	0.40 Max	159 to 237	22 HRC Max

ASTM A194 Gr.4
This material is considered as the most suitable for nuts, when they are used with bolts made from ASTM A-193 B16 and A-320 L7. Even at high temperature range. Then material has superior physical characteristics to those ASTMA A-194 2H previously mentioned. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Mo	Brinell Hardness	Rockwell Hardness
0.40 - 0.50	0.70 - 0.90	0.035 Max	0.04 Max	0.15 - 0.35	0.20 - 0.30	248 to 352	24 to 38 HRC

ASTM A194 Gr. 8 (AISI 304)
This is nut material for bolts made from ASTM A-193 B8, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Cr	Ni	Brinell Hardness	Rockwell Hardness
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	18.00 - 20.00	8.00 - 10.50	126 to 300	60 to 105 HRB

ASTM A194 Gr. 8M (AISI 316)
This is nut material for bolts made from ASTM A-193 B8M and A-320 B8M, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Cr	Ni	Mo	Brinell Hardness	Rockwell Hardness
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	16.00 - 18.00	10.00 - 14.00	2.00 - 3.00	126 to 300	60 to 105 HRB

ASTM A194 Gr. 8C (AISI 347)
This is nut material for bolts made from ASTM A-193 B8C, A-320 B8Cand A-320 B8T, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Cr	Ni	Cb + Ta	Brinell Hardness	Rockwell Hardness
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00 - 19.00	9.00 - 13.00	10 * C% min	126 to 300	60 to 105 HRB

ASTM A194 Gr. 8T (AISI 321)
This is nut material for bolts made from ASTM A-193 B8Tand A-320 B8T, considered to be used with suitable heat treatment. The chemical properties and physical characteristics are as follows :

C	Mn	P	S	Si	Cr	Ni	Ti	Brinell Hardness	Rockwell Hardness
0.08 Max	2.00 Max	0.045 Max	0.030 Max	1.00 Max	17.00 - 19.00	9.00 - 12.00	5 C% min	126 to 300	60 to 105 HRB

ASTM A307
This material is suitable in structural application where nominal strength alongwith weldability is required.

Grade	P	S	Tensile Strength min, ksi (MPa)	Yield Strength. min, 0.2% offset, Ksi (MPa)	Elongation in 2" min %	Hardness max
A	0.06 Max	0.15 Max	60 (415)	-	18	121 - 241 BHN
B	0.04 Max	0.05 Max	60 - 100 (415 - 690)	-	18	121 - 241 BHN
C	-	0.05 Max	58 - 80 (400 - 550)	36(50)	23	Not Required

ASTM A563
This specification of material is used for manufactoring nuts for balts/styds made from ASTM A307

Grade	C	Mn (Max)	P (Max)	S (Max)
O,A,B,C	0.58 Max	-	0.13	-
D	0.58 Max	0.27	0.048	0.058
DH	0.58 Max	0.57	0.048	0.058

Grade	Hardness Required
O	103 to 302 BHN
A	116 to 302 BHN
B	90 to 121 BHN
C	143 to 352 BHN
D	159 to 352 BHN
DH	248 to 352 BHN