Specification and classification of materials
Specification and classification of materials
ASTM materials
ASTM materials at a glance
ASTM materials are based on ASTM International specifications and define material-related requirements such as chemical composition, mechanical properties and test conditions. ASTM standards are particularly widespread in the American market, but also play an important role in international business and in global technical specifications. Of course, we also manufacture components and fasteners for our customers according to ASTM specifications - precisely, in compliance with standards and tailored to the respective application.
Source: https://www.astm.org/
| Marking | Standard | Description | Material | Comparable EN material |
|---|---|---|---|---|
No Grade Mark |
SAE J429 | Bolts, Screws, Studs |
Low or Medium Carbon Steel |
--- |
| ASTM A307 Grade A & B |
Low Carbon Steel | --- | ||
| SAE J429 Grade 2 |
Low or Medium Carbon Steel |
--- | ||
| No Grade Mark | SAE J429 Grade 4 |
Studs | Medium Carbon Cold Drawn Steel |
--- |
| B5 | ASTM A193 Grade B5 |
Bolts, Screws, Studs for high temperature service Class 1: Carbide solution treated |
AISI 501 | ~1.7362 |
| B6 | ASTM A193 Grade B6 |
AISI 410 | ~1.4006 | |
| B7 | ASTM A193 Grade B7 |
AISI 4140, 4142, 4105 | ~1.7225 | |
| B16 | ASTM A193 Grade B16 |
CrMoVa Alloy Steel |
~1.7711 | |
B8 |
ASTM A193 Grade B8 Class 1 |
AISI 304 |
~1.4301 |
|
B8C |
ASTM A193 Grade B8C Class 1 |
AISI 347 |
~1.4550 |
|
B8M |
ASTM A193 Grade B8M Class 1 |
AISI 316 |
~1.4401 |
|
B8T |
ASTM A193 Grade B8T Class 1 |
AISI 321 |
~1.4541 |
|
B8 |
ASTM A193 Grade B8 Class 2 |
Bolts, Screws, Studs for high temperature service Class 2: Carbide solution treated and strain hardened |
AISI 304 Strain Hardened |
~1.4301 |
B8C |
ASTM A193 Grade B8C Class 2 |
AISI 347 Strain Hardened |
~1.4550 | |
B8M |
ASTM A193 Grade B8M Class 2 |
AISI 316 Strain Hardened |
~1.4401 | |
B8T |
ASTM A193 Grade B8T Class 2 |
AISI 321 Strain Hardened |
~1.4541 | |
| L7 | ASTM A320 Grade L7 |
Bolts, Screws, Studs for low temperature service Quenched and tempered |
AISI 4140, 4142, 4145 |
~1.7225 |
| L7A | ASTM A320 Grade L7A |
AISI 4037 | --- | |
| L7B | ASTM A320 Grade L7B |
AISI 4137 | ~1.7220 | |
| L7C | ASTM A320 Grade L7C |
AISI 8740 | ~1.6546 | |
| L43 | ASTM A320 Grade L43 |
AISI 4340 | ~1.6580 | |
B8 |
ASTM A320 Grade B8 Class 1 |
Bolts, Screws, Studs for low temperature service Class 1: Carbide solution treated |
AISI 304 |
~1.4301 |
B8C |
ASTM A320 Grade B8C Class 1 |
AISI 347 |
~1.4550 |
|
B8T |
ASTM A320 Grade B8T Class 1 |
AISI 321 |
~1.4541 |
|
B8F |
ASTM A320 Grade B8F Class 1 |
AISI 303 (Se) |
~1.4305 |
|
B8M |
ASTM A320 Grade B8M Class 1 |
AISI 316 |
~1.4401 |
|
B8 |
ASTM A320 Grade B8 Class 2 |
Bolts, Screws, Studs for low temperature service Class 2: Carbide solution treated and strain hardened |
AISI 304 |
~1.4301 |
B8C |
ASTM A320 Grade B8C Class 2 |
AISI 347 |
~1.4550 |
|
B8T |
ASTM A320 Grade B8T Class 2 |
AISI 321 |
~1.4541 |
|
B8F |
ASTM A320 Grade B8F Class 2 |
AISI 303 (Se) |
~1.4305 |
|
B8M |
ASTM A320 Grade B8M Class 2 |
AISI 316 |
~1.4401 |
|
3 Radial Lines 120° |
SAE J429 Grade 5 |
Bolts, Screws, Studs |
Medium Carbon Steel Quenched and Tempered |
--- |
| ASTM A449 | ||||
3 Radial Lines 90° |
SAE J429 Grade 5.1 |
Bolts, Screws, Studs |
Low or Medium Carbon Steel Quenched and Tempered |
--- |
3 Radial Lines 60° |
SAE J429 Grade 5.2 |
Bolts, Screws, Studs |
Low Carbon Martensitic Steel Quenched and Tempered |
--- |
| A325 | ASTM A325 Type 1 |
High strength structural bolts |
Medium Carbon Steel Quenched and Tempered |
--- |
--- |
ASTM A325 Type 2 (Withdrawn) |
Low Carbon Martensitic Steel Quenched and Tempered |
--- |
|
A325 |
ASTM A325 Type 3 |
Atmospheric Corrosion Resisting Steel Quenched and Tempered |
--- |
|
| BD | ASTM A354 Grade BD |
Bolts, Studs |
Alloy Steel Quenched and Tempered |
--- |
| BC | ASTM A354 Grade BC |
--- | ||
5 Radial Lines |
SAE J429 Grade 7 |
Bolts, Screws |
Medium Carbon Alloy Steel Quenched and Tempered |
--- |
6 Radial Lines 60° |
SAE J429 Grade 8 |
Bolts, Screws, Studs |
Medium Carbon Alloy Steel Quenched and Tempered |
--- |
No Grade Mark |
SAE J429 Grade 8.1 |
Studs |
Medium Carbon Alloy or SAE 1041 Modified Elevated Quenched and Tempered |
--- |
| A490 | ASTM A490 | High strength structural bolts |
Alloy Steel Quenched and Tempered |
--- |
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