What differences between SA537 CL3 steel plate and SA537 CL1 steel plate？

Home

Business

Products

Solution

News

About Us

Home Industry News What differences between SA537 CL3 steel plate and SA537 CL1 steel plate？

What differences between SA537 CL3 steel plate and SA537 CL1 steel plate？

2025-12-04

SA537 CL3 steel plate VS SA537 CL1 steel plate

SA537 CL3 steel plate and SA537 CL1 steel plate are both used for pressure vessels and boilers building.SA537 CL3 steel plate shall be done quenched and tempered heat treatment,however SA537 CL1 steel plate done normalized heat treatment.Vacuum treatment and impacting test are supplementary requirements for SA537 CL3 steel plate and SA537 CL1 steel plate.General requirements for SA537 CL1 steel plate and SA537 CL3 steel plate shall be comply to specification ASME SA20/SA20M.

Comparasion of SA537 CL1 steel plate,SA537 CL3 owned a higher yield strength above 380 Mpa for plate thickness equal and below 65mm.SA537 CL1 steel plate owned minimum 345 Mpa.EN 10204 3.2 TYPE mill certificate can be offer to SA537 CL1 steel plate with ABS,TUV,SGS or other third party inspections.

Difference in SA537 CL3 steel plate and SA537 CL1 Chemical composition

SA537 CL1 vs SA537 CL3		Chemical composition: Heat Analysis Max%
Standard	Grade	C	Mn	P	S	Si	Cu	Ni	Cr	Mo
ASME SA537/SA537M	SA537 CL1	0.24	0.64-1.46	0.035	0.035	0.13-0.55	0.38	0.28	0.29	0.09
ASME SA537/SA537M	SA537 CL3	0.24	0.64-1.46	0.035	0.035	0.13-0.55	0.38	0.28	0.29	0.09

Difference in SA537 CL3 plate and SA537 CL1 Mechanical Properties

Mechanical Properties:		Thickness	Yield strength	Tensile strength
			Mpa Min.	Mpa
ASME SA537/SA537M	SA537 CL1	T≤65	345	450-585
ASME SA537/SA537M	SA537 CL3	T≤65	380	550-690

prev: What is Difference of SA 283 GR C and SA 516 GR 70?

next: What is the difference between A537 Class 1 and Class 2?

GNEE GROUP