ASTM A283 Gr C steel vs. ASTM A36 Carbon Steel katalor supplied

 1.MATERIAL SCOPE
 ASTM A 283 Gr C consist of four grade of material (A,B,C, & D) of Carbon Steel Plate of Structural Qualityfor General Application ASTM A 36 covers Carbon Steel plate, shape, and bar of Structural Quality for use in riveted, bolted or weldedconstruction of bridges and building and for General Structural purposeFrom material scope, both ASTM A 36 and ASTM A283 are the Carbon Steel of Structural Quality for General Application
CHEMICAL COMPOSITION（Thickness up to 19 mm）

The chemical composition between ASTM A36 and ASTM A 283 Gr C differ only on Mn content,The effect of Mn and other element to the weldability can be known by Carbon Equivalen (CE) calculation
The formula CE = C + Si/24 + Mn/6 + Ni/40 + Cr/5 + Mo/4 + V/4 (5.2)
where the element in  %  weigth
ASTM A 36
CE = 0.25 + 0.4 / 24
= 0.266 %
ASTM A 283 Gr C
CE = 0.24 + 0.4/24 + 0.9/6 + 0 + 0 + 0 + 0
= 0.406 %

 It seem that CE of A283 Gr C is higher than ASTM A 36. Base on this A 283 Gr C is litte bit difficult to weldcompare to A 36.Refering to ASME IX the weldability of material is classified in to P-Number. Both A283 Gr C and A 36 is groupin to the same P number 1. It mean that once we make the WPS/PQR with A-36, it also valid for A283 Gr C.

MECHANICAL PROPERTIES：

 The mechanical propertiies between A36 and A283 Gr C are almost the same which mean the mechanical proprange are not big different.

 4.CONCLUSION
Base on the above explanation, it can consider that A 36 can be used to alternative substitution of A 283 Gr C.In order to decide A36 as substitution of A 283Gr C further Engineering approval is required.

5.REFERENCE
5.1. ASTM A 36 & ASTM A 283 Gr C Vol. 01.04, Edition. 19985.2. Introduction to the Physical Metallurgy of  A36 &A283C

 Katalor is the supplier of ASTM A283 Gr C and  ASTM A36 Carbon Steel. Welcome to to send inquiry of ASTM A283Gr C and  ASTM A36Carbon Steel to katalor.

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