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ASTM A502 Structural Steel Rivets Specification

Steel Rivets for Structural Fabrication Purpose

ASTM A502 Structural Rivets

ASTM A502 specification covers three grades of steel rivets in diameters from 1/2 to 11/2 in. inclusive, for structural fabricating purposes.

Scope

Grade Description
ASTM A502 Grade 1 Carbon steel rivets for general purpose use
ASTM A502 Grade 2 Carbon manganese steel rivets for use with high strength carbon and high strength low alloy structural steels
ASTM A502 Grade 3 Weathering steel rivets

ASTM A502 Chemical Requirements

Elements ASTM A502 Grade 1 ASTM A502 Grade 2 ASTM A502 Grade 3 A , B
Heat Analysis, % Product Analysis, C % Heat Analysis, % Product Analysis, % Class A Class B
Heat Analysis, % Product Analysis, % Heat Analysis, % Product Analysis, %
C 0.13-0.25 0.11-0.27 0.19-0.30 0.16-0.33 0.10-0.19 0.09-0.20 0.20 max 0.21 max
Mn 0.30-0.90 0.27-0.93 1.20-1.65 1.14-1.71 0.90-1.25 0.86-1.29 0.75-1.25 0.71-1.29
P, max . . . . . . . . . . . . . . . . . . . . . . . .
acid 0.06 0.070 0.06 0.070 . . . . . . . . . . . .
basic 0.04 0.048 0.04 0.048 0.04 0.045 0.04 0.045
S, max 0.05 0.058 0.05 0.058 0.05 0.055 0.05 0.055
Si . . . . . . 0.10-0.35 0.08-0.37 0.15-0.35 0.13-0.37 0.15-0.35 0.13-0.37
Ni . . . . . . . . . . . . . . . . . . 0.25-0.50 0.22-0.53
Cr . . . . . . . . . . . . 0.40-0.65 0.37-0.68 0.40-0.70 0.37-0.73
Cu . . . . . . . . . . . . 0.25-0.40 0.22-0.43 0.20-0.40 0.17-0.43
Cu, when copper bearing  steel is specified, min 0.20 0.18 0.20 0.18 . . . . . . . . . . . .
V . . . . . . . . . . . . 0.02-0.10 0.01-0.11 0.01-0.10 0.11 max
  • (A) A and B are classes of material used for Grade 3 rivets. Selection of a class shall be at the option of the rivet manufacturer.
  • (B) See 5.2.
  • (C) Product analysis is not applicable to rivets made from rimmed steel or merchant quality bars.
  • 5.2 Grade 3 rivets shall be weathering steel and shall conform to Class A or Class B chemical composition specified in Table 1. The selection of the composition, A or B, shall be at the option of the rivet manufacturer. See Guide G101 for methods of estimating the atmospheric corrosion resistance of low alloy steels.

ASTM A502 Hardness Requirements

Hardness  ASTM A502 Grade 1 ASTM A502 Grade 2 ASTM A502 Grade 3
Min Max Min Max Min Max
Rockwell, B 55 72 76 85 76 93
Brinell, 500-kgf (4900-N),  10-mm ball 103 126 137 163 137 197

ASTM A502 Bolting Surface Treatment Specifications

ASTM A502 Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

Grade Grade Marking
ASTM A502 Grade 1 none required A
ASTM A502 Grade 2 TB 2
ASTM A502 Grade 3 TB 3
  • (A) The numeral 1 shall be used at the manufacturer's option.

ASTM A502 Bolting Certifications

  • EN 10204 3.1
  • EN 10204 3.2
  • PED 2014/68/EC
  • MERKBLATT AD 2000 W2/W7/W10
  • API 20 E BSL 1/ BSL 2
  • NACE MR 0175
  • NACE MR 0103

ASTM A502 Supplementary Requirements

S1 Additional Hardness Tests on Individual Shipments