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ASTM & SAE Grade Markings for Steel Bolts and Screws

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ASTM & SAE Grade Markings for Steel Bolts and Screws | Industrial Hardware & Specialties, Inc.
ASTM & SAE Grade Markings for Steel Bolts and Screws
Grading *
Marking
Specification Material Bolt & Screw
Size, Inches
Min. Yield
Strength
Min. Tensile
Strength
 
18 - 8
18 Chromium
8 Nickel
"300" Series
Stainless Steel
All Diameters 30,000** 70,000**
  ASTM-A193 / A320
GR  B8
CL-1
Solution Treated
304 - 304L
Stainless Steel
All Diameters 30,000 75,000
  ASTM-A193 / A320
GR  B8M
CL-1
Solution Treated
316 - 316L
Stainless Steel
All Diameters 30,000 75,000
  ASTM A193 / A320
GR  B8A
CL-1A
304 - 304L
Stainless Steel
Solution Treated In Finished Condition
All Diameters 30,000 75,000
  ASTM  A193 / A320
GR  B8MA
CL-1A
316 - 316L
Stainless Steel
Solution Treated In Finished Condition
All Diameters 30,000 75,000
  ASTM A193
GR B6
410 Stainless Steel
Quenched and Tempered
1/4" thru 4" 85,000 110,000
  ASTM A193
GR B8C
CL1
347 Stainless Steel
Solution Treated
All Diameters 30,000 75,000
  ASTM A193
GR B8T
CL1
321 Stainless Steel
Solution Treated
All Diameters 30,000 75,000
  ASTM A193
GR B8R
Nitronic 50
Solution Treated
All Diameters 55,000 100,000
  ASTM A193
GR B8S
Nitronic 60
Solution Treated
All Diameters 50,000 95,000
  ASTM F593
Cond. AH
17 - 4 PH (Type 630)
Annealed and Age Hardened
1/4" thru 1-1/2" 105,000 135,000
  ASTM-A307
GR-A
Low or Medium
Carbon Steel
1/4" thru 4" --------- 60,000
  ASTM-A307
GR-B
Low or Medium
Carbon Steel
1/4" thru 4" --------- 60,000
100,000 Max.
  ASTM-A449
J429 GR5
Medium Carbon Steel
Quenched and Tempered
1/4" thru 1"
1" thru 1-1/2"
1-1/2" thru 3"
85,000
74,000
55,000
120,000
105,000
90,000
  J429 GR8 Medium Carbon Alloy Steel
Quenched and Tempered
1/4" thru 1-1/2" 120,000 150,000
  ASTM A354
GR BC
Alloy Steel
Quenched and Tempered
1/4" thru 2-1/2"
over 2-1/2" - 4"
109,000
99,000
125,000
115,000
  ASTM A354
GR BD
Alloy Steel
Quenched and Tempered
1/4" thru 2-1/2"
over 2-1/2" - 4"
130,000
115,000
150,000
140,000
  ASTM A193
GR B7
Chrom - Moly - Steel
Quenched and Tempered
2-1/2" & under
over 2-1/2" thru 4"
over 4" thru 7"
105,000
95,000
75,000
125,000
115,000
100,000
  ASTM A193
GR B16
Chrom - Moly - Vanadium - Steel
Quenched and Tempered
2-1/2" & under
over 2-1/2" thru 4"
over 4" thru 7"
105,000
95,000
75,001
125,000
115,000
100,000
  ASTM A325
Type 1
Medium Carbon Steel
Quenched and Tempered
1/2" thru 1"
1-1/8" thru 1-1/2
85,000
74,000
120,000
105,000
  ASTM A325
Type 3
Weather Resistant Steel
Quenched and Tempered
1/2" thru 1"
1-1/8" thru 1-1/2
85,000
74,000
120,000
105,000
  ASTM A490 Alloy Steel
Quenched and Tempered
1/2" thru 1-1/2" 120,000 150,000
* Manufacturer's ID also appears.
** Cold forming greatly increases these values.  Actual properties will be considerably higher
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