Chrome Moly Alloy Steel Plate ASTM A387 GR.91 CL2 1800 * 8000 * 8 mm - Product News - News

Product Item: Alloy Steel Plate
Material: ASTM A387 Grade 91 Class 2
Sizes: 1800 x 8000 x 8 mm

The Alloy Steel Plate is crafted from ASTM A387 Grade 91 Class 2, offering excellent strength and resistance to high temperatures.

With a width of 1800 mm, length of 8000 mm, and thickness of 8 mm, this plate is ideal for use in industries requiring durable materials for high-pressure and high-temperature applications.

Our ASTM A387 Supply Range:

Description: Chrome Moly Alloy Steel Plate ASME SA387/ ASTM A387
Grade: A/SA387 GRADE 11, 22, 12, 5, 9, 91
Manufacturing Types: Hot Rolled, Heat Treated
Thickness: 5 to 150 mm
Width: 0.6m to 3m
Length: 6m, 12m, customized
Surface: Natural, Painted
Packing: Standard sea packing, bundled with streel strip.
Customized cutting: Laser Cut, Plasma Cut, CNC Cut.

ASTM A387 GR 91 CLASS 2 Chemical Composition

Grade	C	Mn	P	S	Si	Cr	Mo	V
A387 Gr.91	0.08-0.12	0.30-0.60	0.020	0.010	0.20-0.50	8.00-9.50	0.85-1.05	0.18-0.25

ASTM A387 / SA387 GR 91 CLASS 2 Mechanical Properties

Class	Tensile (MPa)	Yield (MPa)	Elong. (50mm)	Elong. (200mm)	Reduc'n of Area*
Class 2	585 - 760	415 min	18% min	-	-

Equivalent Grades for ASME SA387 Grade 91 Alloy Steel Plates Class 2 Plates

COUNTRY	USA	EUROPEAN	GERMANY	ENGLAND	FRANCE	RUSSIA
STANDARDS	ASTM	EN 10028	DIN	BS	AFNOR 36206	GOST
Grade 91	A387	10CrMoVNb9-1	-	-	-	-

Overview SA 387 Gr 12 / SA 387 Gr 5 / SA 387 Gr 9 / SA 387 Gr 91

Certain applications with the Refining and Power Industries along with specific environments within Chemical Plants require grades which address limited corrosion and elevated temperature concerns.
SA 387 Gr 12 is utilized to address low to moderate temperature challenges. For conditions with higher elevated operating temperatures, our SA 387 Gr 5, SA 387 Gr 9 and SA 387 Gr 91 are often used. Minimum tempering temperature for these cr / mo grades are:

SA 387 Gr 12 (1150 °F)
SA 387 Gr 9 (1250 °F)
SA 387 Gr 5 (1300 °F)
SA 387 Gr 91 (1350 °F)

Thickness' from 3/16″ – 6″

Supplemental testing available to simulate application and environment conditions

These grades can be specified in either Class 1 or Class 2

Computer controlled processing per customer specifications

In the tables use SA 387 Gr 12, SA 387 Gr 5, SA 387 Gr 9, and SA 387 Gr 91

Chemical Requirements

*Elements represented in percentage

Element Composition %
Element Composition %	SA 387 Grade 12	SA 387 Grade 5	SA 387 Grade 9	SA 387 Grade 91
Carbon, max:
Heat analysis	0.05-0.17	0.15 max	0.15 max	0.08-0.12
Product analysis	0.04-0.17	0.15 max	0.15 max	0.06-0.15
Manganese, max:
Heat analysis	0.40-0.65	0.30-0.60	0.30-0.60	0.30-0.60
Product analysis	0.35-0.73	0.25-0.66	0.25-0.66	0.25-0.66
Phosphorus, max:
Heat analysis	0.025	0.025	0.025	0.020
Product analysis	0.025	0.025	0.025	0.025
Sulfur, max:
Heat analysis	0.025	0.025	0.025	0.010
Product analysis	0.025	0.025	0.025	0.012
Silicon:
Heat analysis	0.15-0.40	0.50 max	1.00 max	0.20-0.50
Product analysis	0.13-0.45	0.55 max	1.05 max	0.18-0.56
Chromium:
Heat analysis	0.80-1.15	4.00-6.00	8.00-10.00	8.00-9.50
Product analysis	0.74-1.21	3.90-6.10	7.90-10.10	7.90-9.60
Molybdenum:
Heat analysis	0.45-0.60	0.45-0.65	0.90-1.10	0.85-1.05
Product analysis	0.40-0.65	0.40-0.70	0.85-1.15	0.80-1.10

Tensile Requirements For Class 1 Plates

	SA 387 Grade 12	SA 387 Grade 22, 5, 9
Tensile strength, ksi [MPa]	55 to 80 [380 to 550]	60 to 85 [415 to 585]
Yield strength min. ksi [MPa]	33	30
Elongation in 8 in. [200 mm], min. %	18
Elongation in 2 in. [50 mm], min. %	22	18
Reduction of area, min %		45 40

Tensile Requirements For Class 2 Plates

	SA 387 Grade 12	SA 387 Grade 5, 9	SA 387 Grade 91
Tensile strength, ksi [MPa]	65 to 85 [450 to 585]	75 to 100 [515 to 690]	85 to 110 [585 to 760]
Yield strength min. ksi [MPal]/(0.2% offset)	40 [275]	45 [310]	60 [415]
Elongation in 8 in. [200 mm], min. %B	19	…	…
Elongation in 2 in. [50 mm], min. %B	22	18	18
Reduction of area, min %	…	45 40	…